DLPC3470 datasheet(9/70 Pages) TI1

9 / 70 page

DLPC3470

www.ti.com

DLPS110 – APRIL 2018

Product Folder Links: DLPC3470

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(1)

External pullup resistor must be 8 kΩ or less.

(2)

For more information about usage, see HOST_IRQ Usage Model.

Pin Functions – Peripheral Interface(1)

I/O

DESCRIPTION

NAME

NUMBER

CMP_OUT

A12

Successive approximation ADC comparator output (DLPC3470 controller Input). Assumes a

successive approximation ADC is implemented with a WPC light sensor and/or a thermistor feeding

one input of an external comparator and the other side of the comparator is driven from the ASIC’s

CMP_PWM pin. Should be pulled-down to ground if this function is not used. (hysteresis buffer)

CMP_PWM

A15

Successive approximation comparator pulse-duration modulation (output). Supplies a PWM signal to

drive the successive approximation ADC comparator used in WPC light-to-voltage sensor applications.

Should be left unconnected if this function is not used.

HOST_IRQ(2)

Host interrupt (output)

HOST_IRQ indicates when the DLPC3470 controller auto-initialization is in progress and most

importantly when it completes.

The DLPC3470 controller tri-states this output during reset and assumes that an external pullup is in

place to drive this signal to its inactive state.

IIC0_SCL

N10

I2C slave (port 0) SCL (bidirectional, open-drain signal with input hysteresis): An external pullup is

required. The slave I2C I/Os are 3.6-V tolerant (high-volt-input tolerant) and are powered by VCC_INTF

(which can be 1.8, 2.5, or 3.3 V). External I2C pullups must be connected to a host supply with an

equal or higher supply voltage, up to a maximum of 3.6 V (a lower pullup supply voltage would not

likely satisfy the VIH specification of the slave I2C input buffers).

Reserved

R11

TI internal use. TI recommends an external pullup resistor.

IIC0_SDA

I2C slave (port 0) SDA. (bidirectional, open-drain signal with input hysteresis): An external pullup is

required. The slave I2C port is the control port of ASIC. The slave I2C I/Os are 3.6-V tolerant (high-volt-

input tolerant) and are powered by VCC_INTF (which can be 1.8, 2.5, or 3.3 V). External I2C pullups

must be connected to a host supply with an equal or higher supply voltage, up to a maximum of 3.6 V

(a lower pullup supply voltage would not likely satisfy the VIH specification of the slave I2C input

buffers).

Reserved

R10

TI internal use. TI recommends an external pullup resistor.

LED_SEL_0

B15

LED enable select. Controlled by programmable DMD sequence

Timing

LED_SEL(1:0)

Enabled LED

DLPA2000 device application

None

Red

Green

Blue

LED_SEL_1

B14

These signals will be driven low when RESETZ is asserted and the corresponding I/O power is

supplied. They will continue to be driven low throughout the auto-initialization process. A weak,

external pulldown resistor is still recommended to ensure that the LEDs are disabled when I/O power is

not applied.

SPI0_CLK

A13

O13

Synchronous serial port 0, clock

SPI0_CSZ0

A14

O13

SPI port 1, device select 0 (active low output)

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

ASIC reset assertion.

SPI0_CSZ1

C12

O13

SPI port 1, device select 1 (active low output)

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

ASIC reset assertion.

SPI0_DIN

B12

I12

Synchronous serial port 0, receive data in

SPI0_DOUT

B13

O13

Synchronous serial port 0, transmit data out

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