P89C668 Philips Semiconductors, P89C668 Datasheet - Page 35

• Manufacturer Part Number: P89C668
• Description: 80C51 8-bit Flash microcontroller family 64KB ISP FLASH with 8KB RAM
• Manufacturer: Philips Semiconductors

1. Parameters are valid over operating temperature range and voltage range unless otherwise specified.
2. Load capacitance for port 0, ALE, and PSEN = 100 pF, load capacitance for all other outputs = 80 pF.
3. These values are characterized but not 100% production tested.
4. At 100 kbit/s. At other bit rates this value is inversely proportional to the bit-rate of 100 kbit/s.
5. Determined by the external bus-line capacitance and the external bus-line pull-resistor, this must be < 1 s.
6. Spikes on the SDA and SCL lines with a duration of less than 3 t
7. t
Philips Semiconductors
AC ELECTRICAL CHARACTERISTICS (6 CLOCK MODE) (Continued)
T
NOTES:
2001 Jul 27
amb
I
t
t
t
t
t
t
t
t
t
t
t
t
t
t
SYMBOL
2
HD;STA
LOW
HIGH
RC
FC
SU;DAT1
SU;DAT2
SU;DAT3
HD;DAT
SU;STA
SU;STO
BUF
RD
FD
80C51 8-bit Flash microcontroller family
64KB ISP Flash with 8KB RAM
C Interface
SCL = 400 pF.
CLCL
= 0 C to +70 C, V
= 1/f
START condition hold time
SCL low time
SCL high time
SCL rise time
SCL fall time
Data set-up time
SDA set-up time (before rep. START cond.)
SDA set-up time (before STOP cond.)
Data hold time
Repeated START set-up time
STOP condition set-up time
Bus free time
SDA rise time
SDA fall time
OSC
= one oscillator clock period at pin XTAL1.
CC
= 5 V
PARAMETER
10% or –40 C to +85 C, V
CC
= 5 V
CLCL
35
will be filtered out. Maximum capacitance on bus-lines SDA and
5%, V
SS
= 0 V
7 t
7 t
7 t
INPUT
300 ns
7 t
8 t
7 t
250 ns
250 ns
250 ns
0.3 s
1 s
1 s
1, 2
0 ns
CLCL
CLCL
CLCL
CLCL
CLCL
CLCL
7
7
4
4
4
> 10 t
> 4 t
> 4.0 s
> 4.7 s
> 4.0 s
< 0.3 s
> 4.7 s
> 4.0 s
> 4.7 s
< 0.3 s
OUTPUT
> 4 t
> 1 s
CLCL
CLCL
–
–
P89C668
CLCL
5
5
Preliminary data
– t
– t
4
4
4
4
6
4
4
4
6
FC
RD