80C31 Datasheet, PDF (14/30 Pages) NXP Semiconductors – CMOS single-chip 8-bit microcontrollers

Philips Semiconductors
CMOS single-chip 8-bit microcontrollers
Product specification
80C31/80C51/87C51
AC ELECTRICAL CHARACTERISTICS FOR PHILIPS DEVICES
T_amb = 0°C to +70°C, V_CC = 5V ±20%, V_SS = 0V (PCB80C31/51, PCF80C31/51)^{1, 2, 4, 5}
VARIABLE CLOCK³
SYMBOL FIGURE
PARAMETER
MIN
MAX
UNIT
1/t_CLCL
Oscillator frequency: Speed Versions
PCB8031/51
–2
PCA/PCB/PCF80C31/51 –3
PCB/PCF80C31/51
–4
PCB/FB80C31/51
–5
0.5
12
MHz
1.2
16
MHz
1.2
24
MHz
1.2
33
MHz
t_LHLL
1
t_AVLL
1
t_LLAX
1
t_LLIV
1
t_LLPL
1
t_PLPH
1
t_PLIV
1
t_PXIX
1
t_PXIZ
1
t_AVIV
1
t_PLAZ
1
Data Memory
ALE pulse width
Address valid to ALE low
Address hold after ALE low
ALE low to valid instruction in
ALE low to PSEN low
PSEN pulse width
PSEN low to valid instruction in
Input instruction hold after PSEN
Input instruction float after PSEN
Address to valid instruction in
PSEN low to address float
2t_CLCL–40
ns
t_CLCL–25
ns
t_CLCL–25
ns
4t_CLCL–65
ns
t_CLCL–25
ns
3t_CLCL–45
ns
3t_CLCL–60
ns
0
ns
t_CLCL–25
ns
5t_CLCL–80
ns
10
ns
t_RLRH
2, 3
t_WLWH
2, 3
t_RLDV
2, 3
t_RHDX
2, 3
t_RHDZ
2, 3
t_LLDV
2, 3
t_AVDV
2, 3
t_LLWL
2, 3
t_AVWL
2, 3
t_QVWX
2, 3
t_WHQX
2, 3
t_RLAZ
2, 3
t_WHLH
2, 3
External Clock
RD pulse width
WR pulse width
RD low to valid data in
Data hold after RD
Data float after RD
ALE low to valid data in
Address to valid data in
ALE low to RD or WR low
Address valid to WR low or RD low
Data valid to WR transition
Data hold after WR
RD low to address float
RD or WR high to ALE high
6t_CLCL–100
ns
6t_CLCL–100
ns
5t_CLCL–90
ns
0
ns
2t_CLCL–28
ns
8t_CLCL–150
ns
9t_CLCL–165
ns
3t_CLCL–50
3t_CLCL+50
ns
4t_CLCL–75
ns
t_CLCL–30
ns
t_CLCL–25
ns
0
ns
t_CLCL–25
t_CLCL+25
ns
t_CHCX
5
High time
15
ns
t_CLCX
5
Low time
15
ns
t_CLCH
5
Rise time
20
ns
t_CHCL
5
Fall time
20
ns
NOTES:
1. Parameters are valid over operating temperature range unless otherwise specified.
2. Load capacitance for port 0, ALE, and PSEN = 100pF, load capacitance for all other outputs = 80pF.
3. For all Philips speed versions only.
4. Interfacing the 80C31/51 to devices with float times up to 30ns is permitted. This limited bus contention will not cause damage to port 0
drivers.
5. V_CC = 5V ±10% for 33MHz.
1996 Aug 16
14