IC80C51 Datasheet, PDF (39/44 Pages) Integrated Circuit Solution Inc – CMOS SINGLE CHIP 8-BIT MICROCONTROLLER

IC80C51
IC80C31
Vcc — 0.5V
0.45V
0.7Vcc
0.2Vcc — 0.1
tCHCL
tCLCX
tCHCX
tCLCH
tCLCL
Figure 27. Clock Signal Waveform for ICC Tests in Active and Idle Mode (tCLCH=tCHCL=5 ns)
AC CHARACTERISTICS
(Ta=0°C to 70 °C; VCC=5V+10%; GND=0V; C1 for Port 0, ALE and PSEN Outputs=100pF; C1 for other
outputs=80pF)
EXTERNAL MEMORY CHARACTERISTICS
Symbol
1/tCLCL
tLHLL
tAVLL
tLLAX
tLLIV
tLLPL
tPLPH
tPLIV
tPXIX
tPXIZ
tAVIV
tPLAZ
tRLRH
tWLWH
tRLDV
tRHDX
tRHDZ
tLLDV
tAVDV
tLLWL
tAVWL
tQVWX
tWHQX
tRLAZ
tWHLH
Parameter
Oscillator frequency
ALE pulse width
Address valid to ALE low
Address hold after ALE low
ALE low to valid instr in
ALE low to PSEN low
PSEN pulse width
PSEN low to valid instr in
Input instr hold after PSEN
Input instr float after PSEN
Address to valid instr in
PSEN low to address float
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 to RD or WR low
Data valid to WR transition
Data hold after WR
RD low to address float
RD or WR high to ALE high
24 MHz
Clock
Min Max
——
68 —
26 —
31 —
— 147
31 —
110 —
— 105
0—
— 37
— 188
— 10
230 —
230 —
— 157
0—
— 78
— 282
— 323
105 145
146 —
26 —
31 —
—0
26 57
40 MHz
Clock
Min Max
——
35 —
10 —
15 —
— 80
15 —
60 —
— 55
0—
— 20
— 105
— 10
130 —
130 —
— 90
0—
— 45
— 165
— 190
55 95
80 —
10 —
15 —
—0
10 40
Variable Oscillator
(3.5 - 40 MHz)
Min
Max
3.5
40
2tCLCL–15
—
tCLCL–15
—
tCLCL–10
—
—
4tCLCL–20
tCLCL–10
—
3tCLCL–15
—
—
3tCLCL–20
0
—
—
tCLCL–5
—
5tCLCL–20
—
10
6tCLCL–20
—
6tCLCL–20
—
—
4tCLCL–10
0
—
—
2tCLCL–5
—
7tCLCL–10
—
8tCLCL–10
3tCLCL–20
3tCLCL+20
4tCLCL–20
—
tCLCL–15
—
tCLCL–10
—
—
0
tCLCL–15
tCLCL+15
Unit
MHz
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
Integrated Circuit Solution Inc.
39
MC001-0B