p89c669 NXP Semiconductors, p89c669 Datasheet - Page 21

• Manufacturer Part Number: p89c669
• Description: P89c669 80c51 8-bit Microcontroller Family With Extended Memory; 96 Kb Flash With 2 Kb Ram
• Manufacturer: NXP Semiconductors

Philips Semiconductors
Table 10:
[1]
[2]
[3]
[4]
9397 750 12299
Product data
Symbol
t
t
t
t
t
t
t
t
t
t
t
t
t
t
HD;STA
LOW
HIGH
RC
FC
SU;DAT1
SU;DAT2
SU;DAT3
HD;DAT
SU;STA
SU;STO
BUF
RD
FD
Parameters are valid over operating temperature range unless otherwise specified.
Load capacitance for port 0, ALE, and PSEN = 100 pF, load capacitance for all other outputs = 80 pF.
Interfacing the microcontroller to devices with float times up to 45 ns is permitted. This limited bus contention will not cause damage to
Port 0 drivers.
Parts are tested down to 2 MHz, but are guaranteed to operate down to 0 Hz.
I
2
C-bus interface characteristics
Parameter
START condition hold time
SCL LOW time
SCL HIGH time
SCL rise time
SCL fall time
Data set-up time
SDA set-up time
SDA set-up time
Data hold time
Repeated START set-up
time
STOP condition set-up time
Bus free time
SDA rise time
SDA fall time
10.1 Explanation of AC symbols
Each timing symbol has five characters. The first character is always ‘t’ ( = time). The
other characters, depending on their positions, indicate the name of a signal or the
logical status of that signal. The designations are:
A — Address
C — Clock
D — Input data
H — Logic level HIGH
I — Instruction (program memory contents)
L — Logic level LOW, or ALE
P — PSEN
Q — Output data
R — RD signal
t — Time
V — Valid
W — WR signal
X — No longer a valid logic level
Z — Float
Conditions
before repeated START
condition
before STOP condition
Rev. 02 — 13 November 2003
80C51 8-bit microcontroller family with extended memory
Input
7t
8t
7t
1 s
0.3 s
250 ns
250 ns
250 ns
0 ns
7t
7t
7t
1 s
300 ns
CLCL
CLCL
CLCL
CLCL
CLCL
CLCL
© Koninklijke Philips Electronics N.V. 2003. All rights reserved.
Output
> 4.0 s
> 4.7 s
> 4.0 s
-
< 0.3 s
> 10t
> 1 s
> 4t
> 4t
> 4.7 s
> 4.0 s
> 4.7 s
-
< 0.3 s
P89C669
CLCL
CLCL
CLCL
- t
FC
t
RD
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