PCF8545ATTSLASHA datasheet(52/72 Pages) NXP

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PCF8545

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Product data sheet

Rev. 1 — 13 November 2013

52 of 72

NXP Semiconductors

PCF8545

Universal LCD driver for multiplex rates up to 1:8

Fig 43. I2C-bus timing waveforms

Table 36.

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. Timing waveforms see Figure 44.

Symbol

Parameter

Conditions

VDD < 2.7 V

VDD  2.7 V

Unit

Min

Max

Min

Max

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_N)

CE_N set-up time

150

th(CE_N)

CE_N hold time

trec(CE_N)

CE_N recovery time

100

tsu

set-up time

set-up time for

SDI data

-5

-ns

hold time

hold time for SDI

data

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