米6体育平台手机版

ZHCSN24A August 2019 – May 2021 TPS53676

PRODUCTION DATA

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7.4.4 Pin-strap detection and PIN_DETECT_OVERRIDE

The ADDR pin provides limited resistor pin detection for the PMBus slave address. Connect a resistor divider to ADDR as shown in Figure 7-4. Refer to Table 7-1 to select resistor values. The table shows series E96 value equivalents. Use 1% tolerance resistors for all values. The device loads the decoded value into the SLAVE_ADDRESS command, after pin detection completes. Disable ADDR pin detection using PIN_DETECT_OVERRIDE, to use another address, which is not available in the table.

The BOOT_CHA pin provides resistor pin detection for the channel A boot voltage. The channel B boot voltage does not have pin detection and must be programmed in non-volatile memory. Connect a resistor divider to BOOT_CHA as shown in Table 7-1. The table shows series E96 value equivalents. Use 1% tolerance resistors for all values. After pin detection completes, the decoded result is loaded into the VOUT_COMMAND command for PAGE 0.

For each each pin detection, during boot-up the device performs two measurements to determine an 8 bit binary number, referred to as the pinstrap decode. The 3 LSB bits are determined by shorting the high-side resistor and measuring the low-side resistor value. Pin voltage measurement determines the 5 MSB bits. Pinstrap decodes are mapped to PMBus addresses, and Channel A VBOOT values as shown in the tables below.

Use the PIN_DETECT_OVERRIDE command to achieve values not given by the tables below. This command instructs the device at power-up, whether to follow the values given by pin detection, or use values stored in non-volatile memory to populate the SLAVE_ADDRESS, and VOUT_COMMAND commands.

Figure 7-4 Pin-strap pin connections

Example: Selecting a PMBus address not available by pin-strapping

Select the ADDR resistors R_HA and R_LA to ensure each device on the bus still has a unique adddress at the first power-up. Each device must still be addressed uniquely, in order to configure the PIN_DETECT_OVERRIDE command.
Set bit 1 of PIN_DETECT_OVERRIDE 0b, to disable pin detection for the ADDR pin.
Write the SLAVE_ADDRESS command, to configure the new slave address, in 7-bit right justified binary format.
Issue a STORE_USER_ALL command to commit the configuration to non-volatile memory
At the next power cycle, the values stored in non-volatile memory are used, instead of those selected by the ADDR resistors.

Table 7-2 shows ADDR pinstrap decoding.

Table 7-2 ADDR pinstrap decoding

MSB	PMBus Address	R_LA (kΩ)	R_HA (kΩ)
00000b	88d / B0h	20	1300
00001b	89d / B2h	20	422
00010b	90d / B4h	20	249
00011b	91d / B6h	20	169
00100b	92d / B8h	20	127
00101b	93d / BAh	20	102
00110b	94d / BCh	20	82.5
00111b	95d / BEh	20	68.1
01000b	96d / C0h	20	59
01001b	97d / C2h	Not recommended - reserved address
01010b	98d / C4h	20	43.2
01011b	99d / C6h	20	38.3
01100b	100d / C8h	20	33.2
01101b	101d / CAh	20	29.4
01110b	102d / CCh	20	26.1
01111b	103d / CEh	20	23.2
10000b	104d / D0h	20	20.5
10001b	105d / D2h	20	18.2
10010b	106d / D4h	20	16.2
10011b	107d / D6h	20	14.3
10100b	108d / D8h	20	12.4
10101b	109d / DAh	20	11
10110b	110d / DCh	20	9.53
10111b	111d / DEh	20	8.45
11000b	112d / E0h	20	7.15
11001b	113d / E2h	20	6.19
11010b	114d / E4h	20	5.11
11011b	115d / E6h	20	4.22
11100b	116d / E8h	20	3.4
11101b	117d / EAh	20	2.61
11110b	118d / ECh	20	1.87
11111b	119d / EEh	20	1.15

Table 7-3 BOOT_CHA Pinstrap Decoding

	R_LB = 20.0 kΩ LSB = 000b		R_LB = 27.4 kΩ LSB = 001b		R_LB = 37.4 kΩ LSB = 010b		R_LB = 49.9 kΩ LSB = 011b		R_LB = 64.9 kΩ LSB = 100b		R_LB = 86.6 kΩ LSB = 101b		R_LB = 115.0 kΩ LSB = 110b		R_LB = 154.0 kΩ LSB = 111b
MSB	V_BOOTA (V)	R_HB (kΩ)	V_BOOTA (V)	R_HB (kΩ)	V_BOOTA (V)	R_HB (kΩ)	V_BOOTA (V)	R_HB (kΩ)	V_BOOTA (V)	R_HB (kΩ)	V_BOOTA (V)	R_HB (kΩ)	V_BOOTA (V)	R_HB (kΩ)	V_BOOTA (V)	R_HB (kΩ)
00000b	Do Not Use		0.25	1780	0.26	2430	0.27	3240	0.28	4220	0.29	5620	0.3	7500	0.31	9760
00001b	0.32	422	0.33	576	0.34	787	0.35	1050	0.36	1370	0.37	1820	0.38	2430	0.39	3240
00010b	0.4	249	0.41	340	0.42	464	0.43	619	0.44	806	0.45	1070	0.46	1430	0.47	1910
00011b	0.48	169	0.49	232	0.5	316	0.51	422	0.52	549	0.53	732	0.54	976	0.55	1300
00100b	0.56	127	0.57	174	0.58	237	0.59	316	0.6	412	0.61	549	0.62	732	0.63	976
00101b	0.64	102	0.65	140	0.66	191	0.67	255	0.68	332	0.69	442	0.7	576	0.71	787
00110b	0.72	82.5	0.73	113	0.74	154	0.75	205	0.76	267	0.77	357	0.78	475	0.79	634
00111b	0.8	68.1	0.81	95.3	0.82	130	0.83	174	0.84	226	0.85	301	0.86	392	0.87	536
01000b	0.88	59	0.89	80.6	0.90	110	0.91	147	0.92	191	0.93	255	0.94	332	0.95	453
01001b	0.96	49.9	0.97	68.1	0.98	93.1	0.99	124	1	162	1.01	215	1.02	287	1.03	383
01010b	1.04	43.2	1.05	59	1.06	80.6	1.07	110	1.08	140	1.09	187	1.1	249	1.11	332
01011b	1.12	38.3	1.13	52.3	1.14	71.5	1.15	95.3	1.16	124	1.17	165	1.18	221	1.19	294
01100b	1.2	33.2	1.21	45.3	1.22	61.9	1.23	82.5	1.24	107	1.25	143	1.26	191	1.27	255
01101b	1.28	29.4	1.29	40.2	1.3	54.9	1.31	73.2	1.32	95.3	1.33	127	1.34	169	1.35	226
01110b	1.36	26.1	1.37	35.7	1.38	48.7	1.39	64.9	1.4	84.5	1.41	113	1.42	150	1.43	200
01111b	1.44	23.2	1.45	31.6	1.46	43.2	1.47	57.6	1.48	75	1.49	97.6	1.5	133	1.51	178
10000b	1.52	20.5	1.53	28	1.54	38.3	1.55	51.1	1.56	66.5	1.57	88.7	1.58	118	1.59	158
10001b	1.6	18.2	1.61	24.9	1.62	34	1.63	45.3	1.64	59	1.65	78.7	1.66	105	1.67	140
10010b	1.68	16.2	1.69	22.1	1.7	30.1	1.71	40.2	1.72	52.3	1.73	69.8	1.74	93.1	1.75	124
10011b	1.76	14.3	1.77	19.6	1.78	26.7	1.79	35.7	1.8	46.4	1.81	61.9	1.82	82.5	1.83	110
10100b	1.84	12.4	1.85	17.4	1.86	23.2	1.87	30.9	1.88	40.2	1.89	53.6	1.9	71.5	1.91	95.3
10101b	1.92	11	1.93	15	1.94	20.5	1.95	27.4	1.96	35.7	1.97	47.5	1.98	63.4	1.99	84.5
10110b	2	9.53	2.01	13.3	2.02	18.2	2.03	24.3	2.04	30.9	2.05	41.2	2.06	54.9	2.07	75
10111b	2.08	8.45	2.09	11.5	2.1	15.8	2.11	21	2.12	27.4	2.13	36.5	2.14	48.7	2.15	64.9
11000b	2.16	7.15	2.17	9.76	2.18	13.3	2.19	17.8	2.2	23.2	2.21	30.9	2.22	41.2	2.23	54.9
11001b	2.24	6.19	2.25	8.45	2.26	11.5	2.27	15.4	2.28	20	2.29	26.7	2.30	35.7	2.31	47.5
11010b	2.32	5.11	2.33	7.15	2.34	9.53	2.35	13	2.36	16.9	2.37	22.1	2.38	29.4	2.39	40.2
11011b	2.4	4.22	2.41	5.76	2.42	7.87	2.43	10.5	2.44	13.7	2.45	18.2	2.46	24.3	2.47	32.4
11100b	2.48	3.4	2.49	4.64	2.50	6.34	2.51	8.45	2.52	11	2.53	14.7	2.54	19.6	2.55	26.1
11101b	2.56	2.61	2.57	3.57	2.58	4.87	2.59	6.49	2.60	8.45	2.61	11.3	2.62	15	2.63	20
11110b	2.64	1.87	2.65	2.55	2.66	3.48	2.67	4.64	2.68	6.04	2.69	8.06	2.70	10.7	2.71	14.3
11111b	2.72	1.15	2.73	1.58	2.74	2.15	2.75	2.87	2.76	3.74	2.77	4.99	3.3	6.65	5 ⁽¹⁾	8.87

(1) Requires the use of an external output voltage divider.

封装选项

机械数据 (封装 | 引脚)

散热焊盘机械数据 (封装 | 引脚)

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7.4.4 Pin-strap detection and PIN_DETECT_OVERRIDE