SAB80515 Datasheet, PDF (261/270 Pages) Siemens Semiconductor Group – 8-Bit Single-Chip Microcontroller Family

Device Specifications
AC Characteristics for SAB 80C515-20 / 80C535-20
V_CC = 5 V ± 10 %; V_SS = 0 V T_A = 0 °C to + 70 °C
(C_L for port 0, ALE and PSEN outputs = 100 pF; C_L for all other outputs = 80 pF)
Parameter
Symbol
Limit values
Unit
20 MHz
clock
Variable clock
1/t_CLCL = 3.5 MHz to 20 MHz
min. max.
min.
max.
Program Memory Characteristics
ALE pulse width
t_LHLL
60 –
2 t_CLCL – 40
Address setup to ALE
t_AVLL
20 –
t_CLCL – 30
Address hold after ALE t_LLAX
20 –
t_CLCL – 30
ALE low to valid instr in t_LLIV
–
100 –
ALE to PSEN
t_LLPL
25 –
t_CLCL – 25
PSEN pulse width
t_PLPH
115 –
3 t_CLCL – 35
PSEN to valid instr in
t_PLIV
–
75 –
Input instruction hold
after PSEN
t_PXIX
0
–
0
Input instruction float
after PSEN
t_PXIZ*⁾
–
40 –
Address valid after PSEN t_PXAV*⁾ 47
–
t_CLCL – 3
Address to valid instr in t_AVIV
–
190 –
Address float to PSEN
t_AZPL
0
–
0
–
ns
–
ns
–
ns
4 t_CLCL– 100 ns
–
ns
–
ns
3 t_CLCL – 75 ns
–
ns
t_CLCL – 10
ns
–
ns
5 t_CLCL – 60 ns
–
ns
*⁾ Interfacing the SAB 80C515 / 80C535 microcontrollers to devices with float times up to 45 ns is permissible.
This limited bus contention will not cause any damage to port 0 drivers.
Semiconductor Group
261