DLPA2000 datasheet(23/63 Pages) TI

23 / 63 page

6.16 Flash Interface Timing Requirements

The DLPC34xx flash memory interface consists of a SPI flash serial interface with a programmable clock rate. The

DLPC34xx can support 1- to 128-Mb flash memories.(2) (3) (4)

MIN

MAX

UNIT

fclock

SPI_CLK frequency

See (1)

1.4

36.0

MHz

tp_clkper

SPI_CLK period

50% reference points

27.8

704

tp_wh

SPI_CLK pulse duration high

50% reference points

352

tp_wl

SPI_CLK pulse duration low

50% reference points

352

Transition time – all signals

20% to 80% reference

points (rising signal)

80% to 20% reference

points (falling signal)

0.2

3.0

tp_su

Setup time – SPI_DIN valid before SPI_CLK falling edge 50% reference points

10.0

tp_h

Hold time – SPI_DIN valid after SPI_CLK falling edge

50% reference points

0.0

tp_clqv

SPI_CLK clock falling edge to output valid time –

SPI_DOUT and SPI_CSZ

50% reference points

1.0

tp_clqx

SPI_CLK clock falling edge output hold time –

SPI_DOUT and SPI_CSZ

50% reference points

–3.0

3.0

(1)

This range include the ±200 ppm of the external oscillator (but no jitter).

(2)

Standard SPI protocol is to transmit data on the falling edge of SPI_CLK and capture data on the rising edge. The DLPC34xx does

transmit data on the falling edge, but it also captures data on the falling edge rather than the rising edge. This provides support for SPI

devices with long clock-to-Q timing. DLPC34xx hold capture timing has been set to facilitate reliable operation with standard external

SPI protocol devices.

(3)

With the above output timing, DLPC34xx provides the external SPI device 8.2-ns input set-up and 8.2-ns input hold, relative to the

rising edge of SPI_CLK.

(4)

For additional requirements of the external flash device view the Section 7.3.3.1 section.

SPI_CLK

(Controller output)

SPI_DIN

(Controller input)

SPI_DOUT, SPI_CS(1:0)

(Controller output)

tCLKPER

tWH

tWL

tP_CLQV

tP_CLQX

tP_SU

tP_H

Figure 6-10. Flash Interface Timing

www.ti.com

DLPC3420

DLPS232 – OCTOBER 2021

Submit Document Feedback

Product Folder Links: DLPC3420

DLPA2000 Datenblatt(PDF) 23 Page - Texas Instruments

DLPA2000 Datenblatt(HTML) 23 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 61 62 63

Datenblatt Download

Link URL