DLPA2000 datasheet(8/63 Pages) TI

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Table 5-7. GPIO Peripheral Interface (continued)

PIN(1)

I/O

TYPE(3)

DESCRIPTION(2)

NAME

NO.

GPIO_11

H15

I/O

General purpose I/O 11 (hysteresis buffer). Options:

Thermistor power enable (output). Turns on the power to the thermistor when it is used and

enabled.

Optional GPIO. If unused TI recommends this pin be configured as a logic zero GPIO output and

left unconnected. Otherwise this pin requires an external pullup or pulldown to avoid a floating

GPIO input.

GPIO_10

H14

I/O

General purpose I/O 10 (hysteresis buffer). Options:

RC_CHARGE (output): Intended to feed the RC charge circuit of the thermistor interface.

Optional GPIO. If unused TI recommends this pin be configured as a logic zero GPIO output and

left unconnected. Otherwise this pin requires an external pullup or pulldown to avoid a floating

GPIO input.

GPIO_09

G15

I/O

General purpose I/O 09 (hysteresis buffer). Optional GPIO. If unused TI recommends this pin be

configured as a logic zero GPIO output and left unconnected. Otherwise this pin requires an external

pullup or pulldown to avoid a floating GPIO input.

GPIO_08

G14

I/O

General purpose I/O 08 (hysteresis buffer). Normal mirror parking request (active low): To be driven

by the PROJ_ON output of the host. A logic low on this signal causes the DLPC34xx to PARK the

DMD, but it does not power down the DMD (the DLPAxxxx does that instead). At power-up, GPIO_08

must remain high until HOST_IRQ goes low (see Section 9.3).

GPIO_07

F15

I/O

General purpose I/O 07 (hysteresis buffer). If unused TI recommends this pin be configured as a logic

zero GPIO output and left unconnected. Otherwise this pin requires an external pullup or pulldown to

avoid a floating GPIO input.

GPIO_06

F14

I/O

General purpose I/O 06 (hysteresis buffer). Optional GPIO. If unused TI recommends this pin be

configured as a logic zero GPIO output and left unconnected. Otherwise this pin requires an external

pullup or pulldown to avoid a floating GPIO input.

GPIO_05

E15

I/O

General purpose I/O 05 (hysteresis buffer). Optional GPIO. If unused TI recommends this pin be

configured as a logic zero GPIO output and left unconnected. Otherwise this pin requires an external

pullup or pulldown to avoid a floating GPIO input.

GPIO_04

E14

I/O

General purpose I/O 04 (hysteresis buffer). Options:

3D glasses control (output): Controls the shutters on 3D glasses (Left = 1, Right = 0).

SPI1_CSZ1 (active-low output): Optional SPI1 chip select 1 signal. Requires an external pullup

resistor to deactivate this signal during reset and auto-initialization processes.

Optional GPIO. If unused TI recommends this pin be configured as a logic zero GPIO output and

left unconnected. Otherwise this pin requires an external pullup or pulldown to avoid a floating

GPIO input.

GPIO_03

D15

I/O

General purpose I/O 03 (hysteresis buffer). SPI1_CSZ0 (active low output): SPI1 chip select 0 signal.

This pin is typically connected to the DLPAxxxx SPI_CSZ pin. Requires an external pullup resistor to

deactivate this signal during reset and auto-initialization processes.

GPIO_02

D14

I/O

General purpose I/O 02 (hysteresis buffer). Options:

SPI1_DOUT (output): SPI1 data output signal. This pin is typically connected to the DLPAxxxx

SPI_DIN pin.

Optional DSI Bus Width Config 1 (input): The controller samples this pin during boot and is used

to define the number of lanes used for DSI operation. Requires an external pullup or pulldown

resistor to configure as defined in Table 5-8. After boot, this GPIO pin will continue to be used as

SPI1_DOUT. Select the external pullup or pulldown resistor to not interfere.

DLPC3420

DLPS232 – OCTOBER 2021

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