87C654 Philips Semiconductors, 87C654 Datasheet - Page 18

• Manufacturer Part Number: 87C654
• Description: 80C51 8-bit microcontroller 8K/16K/ 256 OTP/ I2C
• Manufacturer: Philips Semiconductors

*
Philips Semiconductors
NOTE:
1996 Aug 16
CMOS single-chip 8-bit microcontroller
Ports 1.6 and 1.7 should be connected to V
exceed the I
OL1
specification.
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
NOTE:
AC inputs during testing are driven at V
Timing measurements are made at V
V
CC
0.45V
CLOCK SIGNAL
–0.5
V
V
LOAD
LOAD
CC
–0.1V
+0.1V
(NC)
Figure 8. I
through resistors of sufficiently high value such that the sink current into these pins does not
Figure 6. AC Testing Input/Output
All other pins are disconnected
V
CC
Figure 7. Float Waveform
RST
XTAL2
XTAL1
V
CC
SS
0.2V
0.2V
Test Condition, Active Mode
IH
CC
min for a logic ‘1’ and V
REFERENCE
CC
CC
TIMING
POINTS
87C654
–0.5 for a logic ‘1’ and 0.45V for a logic ‘0’.
+0.9
–0.1
18
V
P1.6
P1.7
CC
OH
EA
P0
/V
OL
IL
max for a logic ‘0’.
level occurs. I
I
CC
V
V
CC
CC
*
*
V
V
OH
OL
+0.1V
OH
–0.1V
/I
OL
20mA.
Product specification
87C654
SU00011
SU00272
SU00010