DLPA2005 datasheet(41/60 Pages) TI

41 / 60 page

t2 t3

System State

SYSPWR

PROJ_ON (GPIO_8)

VDD (1.1 V)

VDDLP12

(if not tied to VDD)

VDD_PLLM/D (1.1 V)

VCC18 (1.8 V)

VCC_INTF (e.g. 1.8 V)

VCC_FLSH (e.g. 1.8 V)

PARKZ

PLL_REFCLK

RESETZ

HOST_IRQ

2C (activity)

Regular operation

Fast

Park

Power supplies collapse

(a)

(b)

Signals

from PMIC (DLPA3000)

from other source

FPGA PWR

t1:

A fault is detected and PARKZ is asserted (goes low) to tell the controller to initiate a fast park of the DMD.

t2:

The controller finishes the fast park procedure.

t3:

Eventually all power supplies that were derived from SYSPWR collapse.

t4:

System is completely turned off.

Figure 9-3. DLPC1438 Fast Power-Down

9.3 Power-Up Initialization Sequence

An external power monitor is required to hold the DLPC1438 controller in system reset during the power-up

sequence by driving RESETZ to a logic-low state. It shall continue to drive RESETZ low until all controller

voltages reach the minimum specified voltage levels, PARKZ goes high, and the input clocks are stable. The

external power monitoring is automatically done by the DLPAxxxx PMIC.

No signals output by the DLPC1438 controller will be in their active state while RESETZ is asserted. The

following signals are tri-stated while RESETZ is asserted:

• SPI0_CLK

• SPI0_DOUT

• SPI0_CSZ0

• SPI0_CSZ1

• GPIO [19:00]

Add external pullup (or pulldown) resistors to all tri-stated output signals (including bidirectional signals to be

configured as outputs) to avoid floating controller outputs during reset if they are connected to devices on the

PCB that can malfunction. For SPI, at a minimum, include a pullup to any chip selects connected to devices.

www.ti.com

DLPC1438

DLPS216A – JULY 2021 – REVISED AUGUST 2021

Submit Document Feedback

Product Folder Links: DLPC1438

DLPA2005 Datasheet(PDF) 41 Page - Texas Instruments

DLPA2005 Datasheet(HTML) 41 Page - Texas Instruments

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60

Datasheet Download

Link URL