LPC1786 datasheet(89/117 Pages) NXP

89 / 117 page

LPC178X_7X

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Objective data sheet

Rev. 2 — 27 May 2011

89 of 117

NXP Semiconductors

LPC178x/7x

32-bit ARM Cortex-M3 microcontroller

11.7 I2C-bus

Fig 23. SSP slave timing in SPI mode

SCK (CPOL = 0)

MOSI

MISO

Tcy(clk)

tclk(H)

tclk(L)

tDS

tDH

tv(Q)

DATA VALID

th(Q)

SCK (CPOL = 1)

DATA VALID

MOSI

MISO

tDS

tDH

tv(Q)

DATA VALID

th(Q)

DATA VALID

CPHA = 1

CPHA = 0

002aae830

Table 23.

Dynamic characteristic: I2C-bus pins[1]

Tamb = 40 C to +85 C.[2]

Symbol

Parameter

Conditions

Min

Max

Unit

fSCL

SCL clock

frequency

Standard-mode

100

kHz

Fast-mode

400

kHz

Fast-mode Plus

MHz

fall time

[4][5][6][7]

of both SDA and

SCL signals

Standard-mode

300

Fast-mode

20 + 0.1

 C

300

Fast-mode Plus

120

tLOW

LOW period of

the SCL clock

Standard-mode

4.7

s

Fast-mode

1.3

s

Fast-mode Plus

0.5

s

tHIGH

HIGH period of

the SCL clock

Standard-mode

4.0

s

Fast-mode

0.6

s

Fast-mode Plus

0.26

s

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