83C576 Datasheet, PDF (36/46 Pages) NXP Semiconductors – 80C51 8-bit microcontroller family 8K/256 OTP/ROM, 6 channel 10-bit A/D, 4 comparators, failure detect circuitry, watchdog timer

Philips Semiconductors
80C51 8-bit microcontroller family
8K/256 OTP/ROM, 6 channel 10-bit A/D, 4 comparators,
failure detect circuitry, watchdog timer
Product specification
83C576/87C576
INSTRUCTION
ALE
CLOCK
OUTPUT DATA
WRITE TO SBUF
INPUT DATA
CLEAR RI
0
1
2
3
4
5
6
7
8
t_XLXL
t_QVXH
t_XHQX
0
t_XHDV
VALID
1
2
t_XHDX
VALID
VALID
3
VALID
4
VALID
5
VALID
Figure 28. Shift Register Mode Timing
V_CC–0.5
0.45V
0.7V_CC
0.2V_CC–0.1
t_CHCL
t_CLCX
t_CHCX
t_CLCH
t_CLCL
SU00009
Figure 29. External Clock Drive
6
VALID
7
SET TI
VALID
SET RI
SU00027
V_CC–0.5
0.2V_CC+0.9
0.45V
0.2V_CC–0.1
NOTE:
AC inputs during testing are driven at V_CC –0.5 for a logic ‘1’ and 0.45V for a logic ‘0’.
Timing measurements are made at V_IH min for a logic ‘1’ and V_IL max for a logic ‘0’.
Figure 30. AC Testing Input/Output
SU00010
V_LOAD
V_LOAD+0.1V
V_LOAD–0.1V
TIMING
REFERENCE
POINTS
V_OH–0.1V
V_OL+0.1V
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_OH/V_OL level occurs. I_OH/I_OL ≥ ±20mA.
SU00011
Figure 31. Float Waveform
1998 Jun 04
36