DLPC3421 datasheet(7/63 Pages) TI

7 / 63 page

Table 5-6. Peripheral Interface (continued)

PIN(1)

I/O

TYPE(2)

DESCRIPTION

NAME

NO.

LED_SEL_0

B15

LED enable select. Automatically controlled by the DLPC34xx programmable DMD sequence.

LED_SEL(1:0)

Enabled LED

None

Red

Green

Blue

LED_SEL_1

B14

The controller drives these signals low when RESETZ is asserted and the corresponding I/O power is supplied. The

controller continues to drive these signals low throughout the auto-initialization process. A weak, external pulldown

resistor is recommended to ensure that the LEDs are disabled when I/O power is not applied.

SPI0_CLK

A13

SPI (Serial Peripheral Interface) port 0, clock. This pin is typically connected to the flash memory clock.

SPI0_CSZ0

A14

SPI port 0, chip select 0 (active low output). This pin is typically connected to the flash memory chip select.

TI recommends an external pullup resistor to avoid floating inputs to the external SPI device during controller reset

assertion.

SPI0_CSZ1

C12

SPI port 0, chip select 1 (active low output). This pin typically remains unused.

TI recommends an external pullup resistor to avoid floating inputs to the external SPI device during controller reset

assertion.

SPI0_DIN

B12

Synchronous serial port 0, receive data in. This pin is typically connected to the flash memory data out.

SPI0_DOUT

B13

Synchronous serial port 0, transmit data out. This pin is typically connected to the flash memory data in.

(1)

External pullup resistor must be 8 kΩ or less.

(2)

See Table 5-11 for type definitions.

(3)

For more information about usage, see Section 7.3.2.

(4)

When VCC_INTF is powered and VDD is not powered, the controller may drive the IIC0_xxx pins low which prevents communication

on this I2C bus. Do not power up the VCC_INTF pin before powering up the VDD pin for any system that has additional secondary

devices on this bus.

Table 5-7. GPIO Peripheral Interface

PIN(1)

I/O

TYPE(3)

DESCRIPTION(2)

NAME

NO.

GPIO_19

M15

I/O

General purpose I/O 19 (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_18

M14

I/O

General purpose I/O 18 (hysteresis buffer). Options:

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.

MTR_SENSE, Motor Sense (Input): For focus motor control applications, this GPIO must be

configured as an input to the DLPC34xx and supplied from the focus motor position sensor.

GPIO_17

L15

I/O

General purpose I/O 17 (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_16

L14

I/O

General purpose I/O 16 (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_15

K15

I/O

General purpose I/O 15 (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_14

K14

I/O

General purpose I/O 14 (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_13

J15

I/O

General purpose I/O 13 (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_12

J14

I/O

General purpose I/O 12 (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.

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DLPC3421

DLPS231 – OCTOBER 2021

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