SAB88C166 Datasheet, PDF (52/58 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)
CLKOUT and READY for 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
Parameter
CLKOUT cycle time
CLKOUT high time
CLKOUT low time
CLKOUT rise time
CLKOUT fall time
CLKOUT rising edge to
ALE falling edge
Synchronous READY
setup time to CLKOUT
Synchronous READY
hold time after CLKOUT
Asynchronous READY
low time
Asynchronous READY
setup time ¹⁾
Asynchronous READY
hold time ¹⁾
Async. READY hold time
after RD, WR high
(Demultiplexed Bus) ²⁾
Symbol
Max. CPU Clock
= 20 MHz
min.
max.
t₂₉ CC 50
50
t₃₀ CC ₂₀
–
t₃₁ CC ₁₅
–
t₃₂ CC –
t₃₃ CC –
t₃₄ CC 0 + t_A
5
5
10 + t_A
t₃₅ SR 10
–
t₃₆ SR 10
–
t₃₇ SR 65
–
t₅₈ SR ₂₀
–
t₅₉ SR ₀
–
t₆₀ SR ₀
0
+ 2t_A + t_F
2)
Variable CPU Clock
1/2TCL = 1 to 20 MHz
min.
max.
2TCL
2TCL
TCL – 5
–
TCL – 10 –
–
5
–
5
0 + t_A
10 + t_A
10
–
10
–
2TCL + 15 –
20
–
0
–
0
TCL – 25
+ 2t_A + t_F
2)
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
Notes
1) _{These timings are given for test purposes only, in order to assure recognition at a specific clock edge.}
2) _{Demultiplexed bus is the worst case. For multiplexed bus 2TCL are to be added to the maximum values. This}
adds even more time for deactivating READY.
Semiconductor Group
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