SAB88C166 Datasheet, PDF (45/58 Pages) Siemens Semiconductor Group – 16-Bit CMOS Single-Chip Microcontrollers with/without oscillator prescaler with 32 KByte Flash EPROM

SAB 88C166(W)
AC Characteristics (cont’d)
Demultiplexed Bus for the SAB 88C166
V_CC = 5 V ± 10 %; V_SS = 0 V
T_A = 0 to + 70 ˚C for SAB 88C166-5M
C_L (for Port 0, Port 1, Port 4, ALE, RD, WR, BHE, CLKOUT) = 100 pF
ALE cycle time = 4 TCL + 2t_A + t_C + t_F (100 ns at 20-MHz CPU clock without waitstates)
Parameter
ALE high time
Address setup to ALE
ALE falling edge to RD,
WR (with RW-delay)
ALE falling edge to RD,
WR (no RW-delay)
RD, WR low time
(with RW-delay)
RD, WR low time
(no RW-delay)
RD to valid data in
(with RW-delay)
RD to valid data in
(no RW-delay)
ALE low to valid data in
Address to valid data in
Data hold after RD
rising edge
Data float after RD rising
edge (with RW-delay)
Data float after RD rising
edge (no RW-delay)
Data valid to WR
Data hold after WR
ALE rising edge after RD,
WR
Address hold after RD,
WR
Symbol Max. CPU Clock
= 20 MHz
min.
max.
t₅CC
15 + t_A
–
t₆CC
10 + t_A
–
t₈CC
15 + t_A
–
t₉CC
– 10 + t_A –
t₁₂CC 40 + t_C
–
t₁₃CC 65 + t_C
–
t₁₄SR –
30 + t_C
t₁₅SR –
55 + t_C
t₁₆SR –
t₁₇SR –
t₁₈SR 0
55
+ t_A + t_C
75
+ 2t_A + t_C
–
t₂₀SR –
35 + t_F
t₂₁SR –
15 + t_F
t₂₂CC 35 + t_C
–
t₂₄CC
t₂₆CC
15 + t_F
–
– 10 + t_F –
t₂₈CC 0 + t_F
–
Variable CPU Clock
1/2TCL = 1 to 20 MHz
min.
max.
TCL – 10 + t_A –
TCL – 15 + t_A –
TCL – 10 –
+ t_A
– 10
–
+ t_A
2TCL – 10 –
+ t_C
3TCL – 10 –
+ t_C
–
2TCL – 20
+ t_C
–
3TCL – 20
+ t_C
–
3TCL – 20
+ t_A + t_C
–
4TCL – 25
+ 2t_A + t_C
0
–
–
–
2TCL – 15
+ t_C
TCL - 10 + t_F
– 10
+ t_F
0
+ t_F
2TCL – 15
+ t_F
TCL – 10
+ t_F
–
–
–
–
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
Semiconductor Group
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