P89C668 Philips Semiconductors, P89C668 Datasheet - Page 41

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

Philips Semiconductors
2001 Jul 27
80C51 8-bit Flash microcontroller family
64KB ISP Flash with 8KB RAM
(INPUT/OUTPUT)
(INPUT/OUTPUT)
SDA
SCL
START or repeated START condition
t
HD;STA
t
FD
t
t
LOW
RC
V
NOTE:
For timing purposes, a port is no longer floating when a 100mV change from load voltage occurs,
and begins to float when a 100mV change from the loaded V
LOAD
AC inputs during testing are driven at V
NOTE:
Timing measurements are made at V
V
CC
t
0.45V
RD
–0.5
t
V
V
HIGH
LOAD
LOAD
–0.1V
+0.1V
t
Figure 38. Timing SI01 (I
FC
Figure 39. AC Testing Input/Output
t
SU;DAT1
Figure 40. Float Waveform
0.2V
0.2V
IH
CC
min for a logic ‘1’ and V
REFERENCE
CC
CC
t
HD;DAT
–0.5 for a logic ‘1’ and 0.45V for a logic ‘0’.
TIMING
POINTS
+0.9
–0.1
41
2
C) Interface
OH
/V
OL
IL
repeated START condition
STOP condition
max for a logic ‘0’.
level occurs. I
V
V
OH
OL
+0.1V
OH
–0.1V
SU00010
/I
OL
SU00011
t
20mA.
SU;DAT2
t
SU;STA
t
SU;STO
0.7 V
0.3 V
t
SU;DAT3
CC
CC
t
BUF
P89C668
0.7 V
0.3 V
START condition
Preliminary data
CC
CC
SU00107A