DLPC3435 datasheet(4/59 Pages) TI1

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DLPC3430, DLPC3435

DLPS038B – JULY 2014 – REVISED FEBRUARY 2016

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Product Folder Links: DLPC3430 DLPC3435

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(1)

If operation does not call for an external pullup and there is no external logic that might overcome the weak internal pulldown resistor,

then this I/O can be left open or unconnected for normal operation. If operation does not call for an external pullup, but there is external

logic that might overcome the weak internal pulldown resistor, then an external pulldown resistor is recommended to ensure a logic low.

(2)

External pullup resistor must be 8 k

Ω, or less, for pins with internal pullup or down resistors.

(3)

If operation does not call for an external pullup and there is no external logic that might overcome the weak internal pulldown resistor,

then the TSTPT I/O can be left open/ unconnected for normal operation. If operation does not call for an external pullup, but there is

external logic that might overcome the weak internal pulldown resistor, then an external pulldown resistor is recommended to ensure a

logic low.

Pin Functions – Board Level Test, Debug, and Initialization

I/O

DESCRIPTION

NAME

NUMBER

HWTEST_EN

C10

Manufacturing test enable signal. This signal should be connected directly to ground on the

PCB for normal operation.

PARKZ

C13

DMD fast PARK control (active low Input) (hysteresis buffer). PARKZ must be set high to

enable normal operation. PARKZ should be set high prior to releasing RESETZ (that is, prior to

the low-to-high transition on the RESETZ input). PARKZ should be set low for a minimum of 40

µs before any power is removed from the DLPC343x such that the fast DMD PARK operation

can be completed. Note for PARKZ, fast PARK control should only be used when loss of power

is eminent and beyond the control of the host processor (for example, when the external power

source has been disconnected or the battery has dropped below a minimum level). The longest

lifetime of the DMD may not be achieved with the fast PARK operation. The longest lifetime is

achieved with a normal PARK operation. Because of this, PARKZ is typically used in

conjunction with a normal PARK request control input through GPIO_08. The difference being

that when the host sets PROJ_ON low, which connects to both GPIO_08 and the DLPA2000

PMIC chip, the DLPC343x takes much longer than 40 µs to park the mirrors. The DLPA2000

holds on all power supplies, and keep RESETZ high, until the longer mirror parking has

completed. This longer mirror parking time, of up to 500 µs, ensures the longest DMD lifetime

and reliability.

The DLPA2000 monitors power to the DLPC343x and detects an eminent power loss condition

and drives the PARKZ signal accordingly.

Reserved

P12