PCF8537 datasheet(69/82 Pages) NXP

69 / 82 page

PCF8537

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Product data sheet

Rev. 1 — 31 May 2012

69 of 82

NXP Semiconductors

PCF8537

Industrial LCD driver for multiplex rates up to 1:8

Table 39.

Timing characteristics: SPI-bus

VDD = 1.8 V to 5.5 V; VSS =0V; Tamb = 40 C to +85 C. All timing values are valid within the operating supply voltage and

temperature range and referenced to VIL and VIH with an input voltage swing of VSS to VDD.

Symbol

Parameter

Conditions

VDD < 2.7 V

VDD  2.7 V

Unit

Min

Max

Min

Max

Timing characteristics (see Figure 61)

fclk(SCL)

SCL clock frequency

MHz

tSCL

SCL time

500

200

tclk(H)

clock HIGH time

200

tclk(L)

clock LOW time

200

rise time

for SCL signal

100

fall time

for SCL signal

100

tsu(CE)

CE set-up time

150

th(CE)

CE hold time

trec(CE)

CE recovery time

100

tsu

set-up time

set-up time for SDI data

hold time

hold time for SDI data

Fig 61. SPI-bus timing

013aaa679

SDIO

SCL

70 %

30 %

tclk(L)

th(CE)

trec(CE)

tsu

tclk(H)

tSCL

tsu(CE)

SDIO

td(R)SDIO

tdis(SDIO)

tt(SDIO-SDIO)

Microcontroller driving SDIO bus

PCF8537BH driving SDIO bus

Write example

Read example

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