ZHCSJZ6D June 2019 – December 2021 BQ25618 , BQ25619
PRODUCTION DATA
I2C Slave Address: 6AH
Default I2C Slave Address: 0x6A (1101 010B + R/ W)
Address | Access Type | Acronym | Register Name | Section |
---|---|---|---|---|
00h | R/W | REG00 | Input Current Limit | Go |
01h | R/W | REG01 | Charger Control 0 | Go |
02h | R/W | REG02 | Charge Current Limit | Go |
03h | R/W | REG03 | Precharge and Termination Current Limit | Go |
04h | R/W | REG04 | Battery Voltage Limit | Go |
05h | R/W | REG05 | Charger Control 1 | Go |
06h | R/W | REG06 | Charger Control 2 | Go |
07h | R/W | REG07 | Charger Control 3 | Go |
08h | R | REG08 | Charger Status 0 | Go |
09h | R | REG09 | Charger Status 1 | Go |
0Ah | R | REG0A | Charger Status 2 | Go |
0Bh | R | REG0B | Part Information | Go |
0Ch | R/W | REG0C | Charger Control 4 | Go |
Complex bit access types are encoded to fit into small table cells. Table 8-6 shows the codes that are used for access types in this section.
Access Type | Code | Description |
---|---|---|
Read Type | ||
R | R | Read |
Write Type | ||
W | W | Write |
Reset Value | ||
-n | Value after reset | |
-X | Undefined value |
7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
0 | 0 | 0 | 1 | 0 | 1 | 1 | 1 |
R/W | R/W | R/W | R/W | R/W | R/W | R/W | R/W |
LEGEND: R/W = Read/Write; R = Read only; -n = value after reset |
Bit | Field | POR | Type | Reset | Description | |
---|---|---|---|---|---|---|
7 | EN_HIZ | 0 | R/W | by REG_RST by Watchdog |
HIZ mode enable in buck mode. 0 – Disable (default) 1 – Enable |
|
6 | TS_IGNORE | 0 | R/W | by REG_RST | When charger does not monitor the NTC, host sets this bit to 1 to
ignore the TS pin condition during charging and boost mode. 0 – Include TS pin into charge and boost mode enable conditions. (default) 1 – Ignore TS pin. Always consider TS is good to allow charging and boost mode. NTC_FAULT bits are 000 to report normal status. |
|
5 | BATSNS_DIS | 0 | R/W | by REG_RST | Select either BATSNS pin or BAT pin to regulate battery voltage.
0 – Enable BATSNS in battery CV regulation. If the device fails BATSNS open/short detection (BATSNS_STAT = 1). Battery voltage is regulated through BAT pin. (default) 1 – Disable BATSNS. Use BAT pin in battery CV regulation. |
|
4 | IINDPM[4] | 1 | R/W | by REG_RST | 1600 mA | Input current limit setting (maximum limit, not
typical) Offset: 100 mA Range: 100 mA (000000) – 3.2 A (11111) Default: 2400 mA (10111) IINDPM bits are changed automatically after Section 8.3.3.3 is completed PSEL HIGH = 500 mA PSEL LOW = 2.4 A Host can reprogram IINDPM register bits after input source detection is completed. |
3 | IINDPM[3] | 0 | R/W | by REG_RST | 800 mA | |
2 | IINDPM[2] | 1 | R/W | by REG_RST | 400 mA | |
1 | IINDPM[1] | 1 | R/W | by REG_RST | 200 mA | |
0 | IINDPM[0] | 1 | R/W | by REG_RST | 100 mA |
LEGEND: R/W = Read/Write; R = Read only |
7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
0 | 0 | 0 | 1 | 1 | 0 | 1 | 0 |
R/W | R/W | R/W | R/W | R/W | R/W | R/W | R/W |
LEGEND: R/W = Read/Write; R = Read only; -n = value after reset |
Bit | Field | POR | Type | Reset | Description | |
---|---|---|---|---|---|---|
7 | PFM_DIS | 0 | R/W | by REG_RST | PFM disable in both buck and boost mode. 0 – PFM enable (default) 1 – PFM disable |
|
6 | WD_RST | 0 | R/W | by REG_RST by Watchdog |
I2C Watchdog timer reset. Back to 0 after watchdog
timer reset 0 – Normal (default) 1 – Reset |
|
5 | BST_CONFIG | 0 | R/W | by REG_RST by Watchdog |
Boost mode enable. In charging case application, based on adapter
plug-in or removal, the charger will automatically transit between
charging mode and boost mode by setting BST_CONFIG bit and
CHG_CONFIG bit both to 1. 0 – Boost mode disable (default) 1 – Boost mode enable |
|
4 | CHG_CONFIG | 1 | R/W | by REG_RST by Watchdog |
Battery charging buck mode enable. Charging is enabled when
CE pin is pulled low, CHG_CONFIG bit is 1
and charge current is not zero. 0 – Charge Disable 1 – Charge Enable (default) |
|
3 | SYS_MIN[2] | 1 | R/W | by REG_RST | System minimum voltage setting. 000 – 2.6 V 001 – 2.8 V 010 – 3 V 011 – 3.2 V 100 – 3.4 V 101 – 3.5 V (default) 110 – 3.6 V 111 – 3.7 V |
|
2 | SYS_MIN[1] | 0 | R/W | by REG_RST | ||
1 | SYS_MIN[0] | 1 | R/W | by REG_RST | ||
0 | MIN_VBAT_SEL | 0 | R/W | by REG_RST | Minimum battery voltage when exiting boost mode. The rising
threshold allows the device to start boost mode if other conditions
are valid. 0 – 2.8 V VBAT falling, 3 V rising (default) 1 – 2.5 V VBAT falling, 2.8 V rising |
LEGEND: R/W = Read/Write; R = Read only |
7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
1 | 0 | 0 | 1 | 0 | 0 | 0 | 1 |
R/W | R/W | R/W | R/W | R/W | R/W | R/W | R/W |
LEGEND: R/W = Read/Write; R = Read only; -n = value after reset |
Bit | Field | POR | Type | Reset | Description | |
---|---|---|---|---|---|---|
7 | Reserved | 1 | R/W | |||
6 | Q1_FULLON | 0 | R/W | by REG_RST | In buck mode, charger will fully turn on Q1 RBFET according to this
bit setting when IINDPM is below 700 mA. When IINDPM is over 700 mA,
Q1 is always fully on.
0 – Partially turn on Q1 for better regulation accuracy when IINDPM is below 700 mA. (default) 1 – Fully turn on Q1 for better efficiency when IINDPM is below 700 mA. |
|
5 | ICHG[5] | 0 | R/W | by REG_RST by Watchdog |
640 mA |
Fast charge current setting Default: 340 mA (010001) Range: 0 mA (0000001) – 1180 mA (111011), 20 mA/step 111100: 1290 mA 111101: 1360 mA 111110: 1430 mA 111111: 1500 mA ICHG 0 mA disables charge. |
4 | ICHG[4] | 1 | R/W | by REG_RST by Watchdog |
320 mA | |
3 | ICHG[3] | 0 | R/W | by REG_RST by Watchdog |
160 mA | |
2 | ICHG[2] | 0 | R/W | by REG_RST by Watchdog |
80 mA | |
1 | ICHG[1] | 0 | R/W | by REG_RST by Watchdog |
40 mA | |
0 | ICHG[0] | 1 | R/W | by REG_RST by Watchdog |
20 mA |
LEGEND: R/W = Read/Write; R = Read only |
7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
0 | 0 | 0 | 1 | 0 | 0 | 1 | 0 |
R/W | R/W | R/W | R/W | R/W | R/W | R/W | R/W |
LEGEND: R/W = Read/Write; R = Read only; -n = value after reset |
Bit | Field | POR | Type | Reset | Description | |
---|---|---|---|---|---|---|
7 | IPRECHG[3] | 0 | R/W | by REG_RST by Watchdog |
160 mA |
Precharge current setting Default: 40 mA (0001) Range: 20 mA (0000) – 260 mA (1100) Offset: 20 mA Note: IPRECHG > 260 mA is clamped to 260 mA (1100) |
6 | IPRECHG[2] | 0 | R/W | by REG_RST by Watchdog |
80 mA | |
5 | IPRECHG[1] | 0 | R/W | by REG_RST by Watchdog |
40 mA | |
4 | IPRECHG[0] | 1 | R/W | by REG_RST by Watchdog |
20 mA | |
3 | ITERM[3] | 0 | R/W | by REG_RST by Watchdog |
160 mA | Termination current setting
Default: 60 mA (0010) Range: 20 mA – 260 mA (1100) Offset: 20 mA Note: ITERM > 260 mA is clamped to 260 mA (1100) |
2 | ITERM[2] | 0 | R/W | by REG_RST by Watchdog |
80 mA | |
1 | ITERM[1] | 1 | R/W | by REG_RST by Watchdog |
40 mA | |
0 | ITERM[0] | 0 | R/W | by REG_RST by Watchdog |
20 mA |
LEGEND: R/W = Read/Write; R = Read only |
7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
R/W | R/W | R/W | R/W | R/W | R/W | R/W | R/W |
LEGEND: R/W = Read/Write; R = Read only; -n = value after reset |
Bit | Field | POR | Type | Reset | Description | |
---|---|---|---|---|---|---|
7 | VBATREG[4] | 0 | R/W | by REG_RST by Watchdog |
Battery voltage setting, also called VREG. Default: 4.200 V (01000) 00000 – 3.504 V 00001 – 3.600 V 00010 – 3.696 V 00011 – 3.800 V 00100 – 3.904 V 00101 – 4.000 V 00110 – 4.100 V 00111 – 4.150 V 01000 – 4.200 V 01001 - 11111 – 4.300 V - 4.520 V, 10 mV/step 01110 4.350 V, 10011 4.400 V, 11000 4.450 V, 11101 4.500 V |
|
6 | VBATREG[3] | 1 | R/W | by REG_RST by Watchdog |
||
5 | VBATREG[2] | 0 | R/W | by REG_RST by Watchdog |
||
4 | VBATREG[1] | 0 | R/W | by REG_RST by Watchdog |
||
3 | VBATREG[0] | 0 | R/W | by REG_RST by Watchdog |
||
2 | TOPOFF_TIMER[1] | 0 | R/W | by REG_RST by Watchdog |
Top-off timer setting. 00 – Disabled (default) 01 – 15 minutes 10 – 30 minutes 11 – 45 minutes |
|
1 | TOPOFF_TIMER[0] | 0 | R/W | by REG_RST by Watchdog |
||
0 | VRECHG | 0 | R/W | by REG_RST by Watchdog |
Battery
recharge threshold setting. 0 – 120 mV (default) 1 – 210 mV |
LEGEND: R/W = Read/Write; R = Read only |
7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
1 | 0 | 0 | 1 | 1 | 1 | 1 | 0 |
R/W | R/W | R/W | R/W | R/W | R/W | R/W | R/W |
LEGEND: R/W = Read/Write; R = Read only; -n = value after reset |
Bit | Field | POR | Type | Reset | Description | |
---|---|---|---|---|---|---|
7 | EN_TERM | 1 | R/W | by REG_RST by Watchdog |
Battery
charging termination enable. 0 – Disable 1 – Enable (default) |
|
6 | Reserved | 0 | R/W | by REG_RST by Watchdog |
Reserved | |
5 | WATCHDOG[1] | 0 | R/W | by REG_RST by Watchdog |
Watchdog timer setting. 00 – Disable timer 01 – 40 s (default) 10 – 80 s 11 – 160 s |
|
4 | WATCHDOG[0] | 1 | R/W | by REG_RST by Watchdog |
||
3 | EN_TIMER | 1 | R/W | by REG_RST by Watchdog |
Battery
charging safety timer enable, including both fast charge and
precharge timers. Precharge timer is 2 hours. Fast charge timer is
set by REG05[2] 0 – Disable 1 – Enable timer (default) |
|
2 | CHG_TIMER | 1 | R/W | by REG_RST by Watchdog |
Battery fast
charging safety timer setting. 0 – 20 hrs 1 – 10 hrs (default) |
|
1 | TREG | 1 | R/W | by REG_RST by Watchdog |
Thermal
regulation threshold: 0 – 90°C 1 – 110°C (default) |
|
0 | JEITA_VSET (45C-60C) | 0 | R/W | by REG_RST by Watchdog |
Battery
voltage setting during JEITA warm (T3 - T5, typically 45C - 60C) 0 – Set charge voltage to 4.1 V (max) (default) 1 – Set charge voltage to VREG |
LEGEND: R/W = Read/Write; R = Read only |
7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
1 | 1 | 1 | 0 | 0 | 1 | 1 | 0 |
R/W | R/W | R/W | R/W | R/W | R/W | R/W | R/W |
LEGEND: R/W = Read/Write; R = Read only; -n = value after reset |
Bit | Field | POR | Type | Reset | Description | |
---|---|---|---|---|---|---|
7 | OVP[1] | 1 | R/W | by REG_RST | VACOV threshold during buck mode and boost mode. 00 – 5.85 V 01 – 6.4 V (5-V input) 10 – 11 V (9-V input) 11 – 14.2 V (12-V input) (default) |
|
6 | OVP[0] | 1 | R/W | by REG_RST | ||
5 | BOOSTV[1] | 1 | R/W | by REG_RST | Boost regulation voltage setting 00 – 4.6 V 01 – 4.75 V 10 – 5.0 V (default) 11 – 5.15 V |
|
4 | BOOSTV[0] | 0 | R/W | by REG_RST | ||
3 | VINDPM[3] | 0 | R/W | by REG_RST | 800 mV | VINDPM
threshold setting Default: 4.5 V (0110) Range: 3.9 V (0000) – 5.4 V (1111) Offset: 3.9 V |
2 | VINDPM[2] | 1 | R/W | by REG_RST | 400 mV | |
1 | VINDPM[1] | 1 | R/W | by REG_RST | 200 mV | |
0 | VINDPM[0] | 0 | R/W | by REG_RST | 100 mV |
LEGEND: R/W = Read/Write; R = Read only |
7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
0 | 1 | 0 | 0 | 1 | 1 | 0 | 0 |
R/W | R/W | R/W | R/W | R/W | R/W | R/W | R/W |
LEGEND: R/W = Read/Write; R = Read only; -n = value after reset |
Bit | Field | POR | Type | Reset | Description | |
---|---|---|---|---|---|---|
7 | IINDET_EN | 0 | R/W | by REG_RST by Watchdog |
Force input source type detection. After the detection is complete,
this bit returns to 0. 0 – Not in input current limit detection. (default) 1 – Force input current limit detection when adapter is present. |
|
6 | TMR2X_EN | 1 | R/W | by REG_RST by Watchdog |
Safety timer is slowed by 2X during input DPM, JEITA cool/warm or
thermal regulation. 0 – Disable. Safety timer duration is set by REG05[2]. 1 – Safety timer slowed by 2X during input DPM (both V and I) or JEITA cool/warm (except ICHG=100%), or thermal regulation. (default) |
|
5 | BATFET_DIS | 0 | R/W | by REG_RST | BATFET Q4 ON/OFF control. Set this bit to 1 to enter ship mode. To
reset the device with adapter present, the host shall set
BATFET_RST_WVBUS to 1 and then BATFET_DIS to 1. 0 – Turn on Q4. (default) 1 – Turn off Q4 after tBATFET_DLY delay time (REG07[3]) |
|
4 | BATFET_RST_WVBUS | 0 | R/W | by REG_RST | Start BATFET full system reset with or without adapter present. 0 – Start BATFET full system reset after adapter is removed from VBUS. (default) 1 – Start BATFET full system reset when adapter is present on VBUS. |
|
3 | BATFET_DLY | 1 | R/W | by REG_RST | Delay from BATFET_DIS (REG07[5]) set to 1 to BATFET turn off during
ship mode. 0 – Turn off BATFET immediately when BATFET_DIS bit is set. 1 – Turn off BATFET after tBATFET_DLY (typ 10 s) when BATFET_DIS bit is set. (default) |
|
2 | BATFET_RST_EN | 1 | R/W | by REG_RST by Watchdog |
Enable BATFET full system reset. The time to start of BATFET full
system reset is based on the setting of BATFET_RST_WVBUS bit. 0 – Disable BATFET reset function 1 – Enable BATFET reset function when REG07[5] is also 1. (default) |
|
1 | VINDPM_BAT_TRACK[1] | 0 | R/W | by REG_RST | Sets VINDPM to track BAT voltage. Actual VINDPM is
higher of register value and VBAT + VINDPM_BAT_TRACK. 00 – Disable function (VINDPM set by register) (default) 01 – VBAT + 200 mV 10 – VBAT + 250 mV 11 – VBAT + 300 mV |
|
0 | VINDPM_BAT_TRACK[0] | 0 | R/W | by REG_RST |
LEGEND: R/W = Read/Write; R = Read only |
7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
x | x | x | x | x | x | x | x |
R | R | R | R | R | R | R | R |
LEGEND: R/W = Read/Write; R = Read only; -n = value after reset |
Bit | Field | POR | Type | Reset | Description |
---|---|---|---|---|---|
7 | VBUS_STAT[2] | x | R | NA | VBUS Status
register 000 – No input 001 – USB host SDP (500 mA) → PSEL pin HIGH 011 – Adapter 2.4 A → PSEL pin LOW 111 – Boost mode Software current limit is reported in IINDPM register |
6 | VBUS_STAT[1] | x | R | NA | |
5 | VBUS_STAT[0] | x | R | NA | |
4 | CHRG_STAT[1] | x | R | NA | Charging
status: 00 – Not charging 01 – Precharge or trickle charge (< VBATLOWV) 10 – Fast charging 11 – Charge termination |
3 | CHRG_STAT[0] | x | R | NA | |
2 | PG_STAT | x | R | NA | Power Good status: 0 – Power Not Good 1 – Power Good |
1 | THERM_STAT | x | R | NA | 0 – Not in thermal
regulation 1 – In thermal regulation |
0 | VSYS_STAT | x | R | NA | 0 – Not in SYS_MIN
regulation (VBAT > VSYS_MIN) 1 – In SYS_MIN regulation (VBAT < VSYS_MIN) |
LEGEND: R/W = Read/Write; R = Read only |
7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
1 | x | x | x | x | x | x | x |
R | R | R | R | R | R | R | R |
LEGEND: R/W = Read/Write; R = Read only; -n = value after reset |
Bit | Field | POR | Type | Reset | Description |
---|---|---|---|---|---|
7 | WATCHDOG_FAULT | 1 | R | NA | 0 – Normal, device is in
host mode, 1 – Watchdog timer expiration, device is in default mode. |
6 | BOOST_FAULT | x | R | NA | 0 – Normal 1 – Fault detected in boost mode (any conditions that are not valid for boost operation), including VBUS overloaded (BST_OVP) or battery is too low (BST_BAT) |
5 | CHRG_FAULT[1] | x | R | NA | 00 – Normal
01 – Input fault 10 – Thermal shutdown 11 – Charge safety timer expiration |
4 | CHRG_FAULT[0] | x | R | NA | |
3 | BAT_FAULT | x | R | NA | 0 – Normal, 1 – Battery overvoltage. |
2 | NTC_FAULT[2] | x | R | NA | TS fault in
buck mode 000 – Normal 010 – Warm 011 – Cool 101 – Cold 110 – Hot TS fault in boost mode 000 – Normal 101 – Cold 110 – Hot |
1 | NTC_FAULT[1] | x | R | NA | |
0 | NTC_FAULT[0] | x | R | NA |
LEGEND: R/W = Read/Write; R = Read only |
7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
x | x | x | x | x | x | 0 | 0 |
R | R | R | R | R | R | R/W | R/W |
LEGEND: R/W = Read/Write; R = Read only; -n = value after reset |
Bit | Field | POR | Type | Reset | Description |
---|---|---|---|---|---|
7 | VBUS_GD | x | R | NA | 0 – VBUS does not pass
poor source detection 1 – VBUS passes poor source detection |
6 | VINDPM_STAT | x | R | NA | 0 – Not in VINDPM 1 – In VINDPM |
5 | IINDPM_STAT | x | R | NA | 0 – Not in IINDPM 1 – In IINDPM |
4 | BATSNS_STAT | x | R | NA | 0 – BATSNS pin is in good
connection. Regulation battery voltage through BATSNS pin. 1 – BATSNS pin is open/short. Regulate battery voltage through BAT pin. |
3 | TOPOFF_ACTIVE | x | R | NA | 0 – Top off timer not
counting. 1 – Top off timer counting |
2 | ACOV_STAT | x | R | NA | 0 – Not in ACOV 1 – In ACOV |
1 | VINDPM_INT_ MASK | 0 | R/W | by REG_RST | Allow or block
INT pulse assertion to host during VINDPM.
0 – INT is asserted to host during VINDPM (default). 1 – No INT pulse asserted to host during VINDPM. |
0 | IINDPM_INT_ MASK | 0 | R/W | by REG_RST | Allow or block
INT pulse assertion to host during
IINDPM 0 – INT is asserted to host during IINDPM (default). 1 – No INT pulse asserted to host during IINDPM. |
LEGEND: R/W = Read/Write; R = Read only |
7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
0 | 0 | 1 | 0 | 1 | 1 | 0 | 0 |
R/W | R | R | R | R | R | R | R |
LEGEND: R/W = Read/Write; R = Read only; -n = value after reset |
Bit | Field | POR | Type | Reset | Description |
---|---|---|---|---|---|
7 | REG_RST | 0 | R/W | NA | Register reset 0 – Keep current register setting (default). 1 – Reset to default register value and reset safety timer. This bit returns to 0 after register reset is completed. |
6 | PN[3] | 0 | R | NA | Reserved |
5 | PN[2] | 1 | R | NA | |
4 | PN[1] | 0 | R | NA | |
3 | PN[0] | 1 | R | NA | |
2 | Reserved |
1 | R | NA | Reserved |
1 | Reserved |
0 | R | NA | Reserved |
0 | Reserved |
0 | R | NA |
LEGEND: R/W = Read/Write; R = Read only |
7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
0 | 1 | 1 | 1 | 0 | 1 | 0 | 1 |
R/W | R/W | R/W | R/W | R/W | R/W | R/W | R/W |
LEGEND: R/W = Read/Write; R = Read only; -n = value after reset |
Bit | Field | POR | Type | Reset | Description |
---|---|---|---|---|---|
7 | JEITA_COOL_ISET [1] | 0 | R/W | by REG_RST by Watchdog |
Fast charge
current setting during cool temperature range (T1 - T2), as
percentage of ICHG in REG02[5:0]. 00 – No Charge 01 – 20% of ICHG (default) 10 – 50% of ICHG 11 – 100% of ICHG (safety timer does not become 2X) |
6 | JEITA_COOL_ISET [0] | 1 | R/W | by REG_RST by Watchdog |
|
5 | JEITA_WARM_ISET [1] | 1 | R/W | by REG_RST by Watchdog |
Fast charge
current setting during warm temperature range (T3 - T5), as
percentage of ICHG in REG02[5:0]. 00 – No Charge 01 – 20% of ICHG 10 – 50% of ICHG 11 – 100% of ICHG (safety timer does not become 2X) (default) |
4 | JEITA_WARM_ISET [0] | 1 | R/W | by REG_RST by Watchdog |
|
3 | JEITA_VT2 [1] | 0 | R/W | by REG_RST by Watchdog |
00 – VT2% =
70.75% (5.5°C) 01 – VT2% = 68.25% (10°C) (default) 10 – VT2% = 65.25% (15°C) 11 – VT2% = 62.25% (20°C) |
2 | JEITA_VT2 [0] | 1 | R/W | by REG_RST by Watchdog |
|
1 | JEITA_VT3 [1] | 0 | R/W | by REG_RST by Watchdog |
00 – VT3% =
48.25% (40°C) 01 – VT3% = 44.75% (44.5°C) (default) 10 – VT3% = 40.75% (50.5°C) 11 – VT3% = 37.75% (54.5°C) |
0 | JEITA_VT3 [0] | 1 | R/W | by REG_RST by Watchdog |
LEGEND: R/W = Read/Write; R = Read only |