P89V51RB2BBC datasheet(69/77 Pages) PHILIPS

69 / 77 page

Philips Semiconductors

P89V51RB2/RC2/RD2

8-bit microcontrollers with 80C51 core

Product data

Rev. 03 — 02 December 2004

69 of 77

9397 750 14341

tCLCX

low time

8.75

0.35TCLCL

0.65TCLCL

tCLCH

rise time

tCHCL

fall time

Table 71:

External clock drive…continued

Symbol

Parameter

Oscillator

Unit

40 MHz

Variable

Min

Max

Min

Max

Fig 33. External clock drive waveform.

002aaa551

0.2 VDD - 0.1

0.45 V

tCHCL

tCLCL

tCLCH

tCLCX

tCHCX

0.7VDD

VDD - 0.5

Table 72:

Serial port timing

Symbol

Parameter

Oscillator

Unit

40 MHz

Variable

Min

Max

Min

Max

tXLXL

serial port clock cycle time

0.3

12tCLCL

µs

tQVXH

output data set-up to clock rising

edge

117

10tCLCL − 133 -

tXHQX

output data hold after clock rising

edge

2tCLCL − 50

tXHDX

input data hold after clock rising

edge

tXHDV

clock rising edge to input data valid

117

10tCLCL − 133 ns

Fig 34. Shift register mode timing waveforms.

002aaa552

ALE

INSTRUCTION

CLOCK

OUTPUT DATA

WRITE TO SBUF

VALID

INPUT DATA

CLEAR RI

tXLXL

tQVXH

tXHQX

tXHDV

tXHDX

SET TI

SET R I

P89V51RB2BBC Datasheet(PDF) 69 Page - NXP Semiconductors

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