5 Pin Configuration and Functions

Figure 5-1 PZP Package,100-Pin PQFP PowerPAD Package(Top View)

Table 5-1 Pin Functions

PIN		TYPE⁽¹⁾	DESCRIPTION
NAME	NO.	TYPE⁽¹⁾	DESCRIPTION
AGND	79, 83, 87, 89, 92	GND	Analog ground – Ground reference and current return for analog circuitry
AVDD	82, 84, 88, 95	V_DD	Analog VDD – Power supply for analog circuitry. Nominally 3.3 V
CTL[3:1]	42, 41, 40	DO	General-purpose control signals – Used for user-defined control. CTL1 is not powered down through PDO.
DE	46	DO	Output data enable – Used to indicate time of active video display versus non-active display or blank time. During blank, the device transmits only HSYNC, VSYNC, and CTL[3:1]. During times of active display, or non-blank, the device transmits only pixel data, QE[23:0], and QO[23:0]. High: Active display time Low: Blank time
DFO	1	DI	Output clock data format – Controls the output clock (ODCK) format for either TFT or DSTN panel support. For TFT support, the ODCK clock runs continuously. For DSTN support, ODCK only clocks when DE is high; otherwise, ODCK remains low when DE is low. High: DSTN support – ODCK held low when DE = low Low: TFT support – ODCK runs continuously.
GND	5, 39, 68	GND	Digital ground – Ground reference and current return for digital core
DVDD	6, 38, 67	V_DD	Digital VDD – Power supply for digital core. Nominally 3.3 V.
EXT_RES	96	AI	Internal impedance matching – The TFP401A-Q1 device has internal optimization for impedance matching at 50 Ω. An external resistor tied to this pin has no effect on device performance.
HSYNC	48	DO	Horizontal sync output
RSVD	99	DI	Reserved. Tie this pin high for normal operation.
OVDD	18, 29, 43, 57, 78	V_DD	Output driver VDD – Power supply for output drivers. Nominally 3.3 V
ODCK	44	DO	Output data clock – Pixel clock. The device synchronizes all pixel outputs QE[23:0] and QO[23:0] (if in 2-pixels-per-clock mode), along with DE, HSYNC, VSYNC and CTL[3:1], to this clock.
OGND	19, 28, 45, 58, 76	GND	Output driver ground – Ground reference and current return for digital output drivers
OCK_INV	100	DI	ODCK polarity – Selects ODCK edge to which pixel data (QE[23:0] and QO[23:0]) and control signals (HSYNC, VSYNC, DE, CTL[3:1]) latch. Normal mode: High: Latches output data on rising ODCK edge Low: Latches output data on falling ODCK edge
PD	2	DI	Power down – An active-low signal that controls the TFP401A-Q1 power-down state. During power down, all output buffers switch to a high-impedance state. The device powers down all analog circuits and disables all inputs, except for PD. If leaving PD unconnected, an internal pullup defaults the TFP401A-Q1 device to normal operation. High : Normal operation Low: Power down
PDO	9	DI	Output drive power down – An active-low signal that controls the power-down state of the output drivers. During output drive power down, the output drivers (except SCDT and CTL1) are driven to a high-impedance state. When PDO is left unconnected, an internal pullup defaults the TFP401A-Q1 device to normal operation. High: Normal operation; output drivers on Low: Output drive powered down
PGND	98	GND	PLL GND – Ground reference and current return for internal PLL.
PIXS	4	DI	Pixel select – Selects between 1- and 2-pixels-per-clock output modes. During the 2-pixels-per-clock mode, the device outputs both even pixels, QE[23:0], and odd pixels, QO[23:0], in tandem on a given clock cycle. During 1-pixel-per-clock mode, the device outputs even and odd pixels sequentially, one at a time, with the even pixel first, on the even-pixel bus, QE[23:0]. (The first pixel per line is pixel-0, the even pixel. The second pixel per line is pixel-1, the odd pixel). High: 2 pixels per clock Low: 1 pixel per clock
PVDD	97	V_DD	PLL VDD – Power supply for internal PLL
QE[8:15]	20–27	DO	Even green-pixel output – Output for even and odd green pixels when in 1-pixel-per-clock mode. Output for even-only green pixel when in 2-pixels-per-clock mode. Output data synchronizes to the output data clock, ODCK. LSB: QE8, pin 20 MSB: QE15, pin 27
QE[16:23]	30–37	DO	Even red-pixel output – Output for even and odd red pixels when in 1-pixel-per-clock mode. Output for even-only red pixel when in 2-pixels-per-clock mode. Output data synchronizes to the output data clock, ODCK. LSB: QE16, pin 30 MSB: QE23, pin 37
QO[0:7]	49–56	DO	Odd blue-pixel output – Output for odd-only blue pixel when in 2-pixels-per-clock mode. Not used, and held low, when in 1-pixel-per-clock mode. Output data synchronizes to the output data clock, ODCK. LSB: QO0, pin 49 MSB: QO7, pin 56
QO[8:15]	59–66	DO	Odd green-pixel output – Output for odd-only green pixel when in 2-pixels-per-clock mode. Not used, and held low, when in 1-pixel-per-clock mode. Output data synchronizes to the output data clock, ODCK. LSB: QO8, pin 59 MSB: QO15, pin 66
QO[16:23]	69–75, 77	DO	Odd red-pixel output – Output for odd-only red pixel when in 2-pixels-per-clock mode. Not used, and held low, when in 1-pixel-per-clock mode. Output data synchronizes to the output data clock, ODCK. LSB: QO16, pin 69 MSB: QO23, pin 77
QE[0:7]	10–17	DO	Even blue-pixel output – Output for even and odd blue pixels when in 1-pixel-per-clock mode. Output for even-only blue pixel when in 2-pixels-per-clock mode. Output data synchronizes to the output data clock, ODCK. LSB: QE0, pin 10 MSB: QE7, pin 17
RxC+	93	AI	Clock positive receiver input – Positive side of reference clock. TMDS low-voltage signal differential-input pair.
RxC–	94	AI	Clock negative receiver input – Negative side of reference clock. TMDS low-voltage signal differential-input pair.
Rx0+	90	AI	Channel-0 positive receiver input – Positive side of channel-0. TMDS low-voltage signal differential-input pair. Channel-0 receives blue pixel data in active display and HSYNC, VSYNC control signals in blank.
Rx0–	91	AI	Channel-0 negative receiver input – Negative side of channel-0. TMDS low-voltage signal differential-input pair.
Rx1+	85	AI	Channel-1 positive receiver input – Positive side of channel-1 TMDS low-voltage signal differential-input pair. Channel-1 receives green-pixel data in active display and CTL1 control signals in blank.
Rx1–	86	AI	Channel-1 negative receiver input – Negative side of channel-1 TMDS low-voltage signal differential-input pair.
Rx2+	80	AI	Channel-2 positive receiver input – Positive side of channel-2 TMDS low-voltage signal differential-input pair. Channel-2 receives red-pixel data in active display and CTL2, CTL3 control signals in blank.
Rx2–	81	AI	Channel-2 negative receiver input – Negative side of channel-2 TMDS low-voltage signal differential-input pair
SCDT	8	DO	Sync detect - Output to signal when the link is active or inactive. The link is active when DE is actively switching. The TFP401A-Q1 device monitors the state of DE to determine link activity. SCDT can be tied externally to PDO to power down the output drivers when the link is inactive. High: Active link Low: Inactive link
ST	3	DI	Output drive strength select – Selects output drive strength for high- or low-current drive. (See dc specifications for I_OH and I_OL versus the ST state). High: High drive strength Low: Low drive strength
STAG	7	DI	Staggered pixel select – An active-low signal used in the 2-pixels-per-clock pixel mode (PIXS = high). Time-staggers the even and odd pixel outputs to reduce ground bounce. Normal operation outputs the odd and even pixels simultaneously. High: Normal simultaneous even-and-odd pixel output Low: Time-staggered even-and-odd pixel output
VSYNC	47	DO	Vertical sync output
Thermal Pad		—	Thermal pad. Recommend soldering the package thermal pad to thermal pad on PCB. Soldering the thermal pad will help to release stress through the solder, otherwise the stress will be absorbed by the peripheral pins.

(1) DI = Digital Input; DO = Digital Output; AI = Analog Input; AO = Analog Output