SAB80C517 Datasheet, PDF (50/61 Pages) Siemens Semiconductor Group – 8-Bit CMOS Single-Chip Microcontroller

SAB 80C517/80C537
AC Characteristics
V_CC = 5 V ± 10 %; V_SS = 0 V T _A = 0 to 70 ^oC for the SAB 80C517/83C537
T _A = – 40 to 85 ^oC for the SAB 80C517/83C537-T40/85
(C_L for port 0, ALE and PSEN outputs = 100 pF; C_L for all other outputs = 80 pF))
Parameter
Symbol
Limit Values
Unit
12 MHz Clock
Variable Clock
1/t _CLCL = 3.5 MHz to 12 MHz
min max.
min.
max.
Program Memory Characteristics
ALE pulse width
Address setup to ALE
Address hold after ALE
ALE to valid
instruction in
t_LHLL
t_AVLL
t_LLAX
t_LLIV
127 –
2 t_CLCL – 40 –
ns
53
–
t_CLCL – 30
–
ns
48
–
t_CLCL – 35
–
ns
–
233 –
4t_CLCL – 100 ns
ALE to PSEN
PSEN pulse width
PSEN to valid
instruction in
t_LLPL
t_PLPH
t_PLIV
58
–
t_CLCL – 25
–
ns
215 –
3 t_CLCL – 35 –
ns
–
150 –
3t_CLCL – 100 ns
Input instruction hold
t_PXIX
0
–
0
ns
after PSEN
Input instruction float
after PSEN ^*)
t_PXIX^*)
–
63
–
t_CLCL – 20
ns
Address valid after
t_PXAV^*)
75
–
t_CLCL – 8
–
ns
PSEN ^*)
Address to valid
instruction in
t_AVIV
–
302 0
5t_CLCL – 115 ns
Address float to PSEN t_AZPL
–
–
–
ns
*) _{Interfacing the SAB 80C517 to devices with float times up to 75 ns is permissible.}
This limited bus contention will not cause any damage to port 0 drivers.
Semiconductor Group
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