Z87233 Datasheet, PDF (51/71 Pages) Zilog, Inc. – CMOS Z8-R MCU Consumer Controller Processor

Z87233
CMOS Z8“ MCU Consumer Controller Processor
45
Bit
Position
D4–D2
Bit
Field
Stop Mode
Reset
R/W State Description
W
000 Stop-Mode Recovery Source²
000: POR only and/or external RESET
001: P30
010: P31
011: P32
100: P33
101: P27
110: P2 NOR 0–3
111: P2 NOR 0–7
D1
Clock
W
0 External Clock Divide-by-2
0: SCLK &TCLK = X_IN ÷ 2
1: SCLK &TCLK = X _IN
D0
SCLK/TCLK W
0 SCLK/TCLK Divide-by-16
0: Off
1: On
Notes:
1. For the Stop-Mode Recovery Source, either SMR or SMR2 can be selected. If SMR is used to
select the Stop-Mode Recovery Source, bits D1–D0 of SMR2 must be 0.
2. Cleared by RESET and SMR.
3. Not reset after Stop-Mode Recovery.
Stop-Mode Recovery Register 2
The Stop-Mode Recovery Register, SMR2, controls additional Port 2 clocking
functions. WRITE and reset states for bits D7–D0 are listed in Table 34.
Table 34. Stop-Mode Recovery Register 2—SMR2 0Dh/R13 Bank Fh: WRITE ONLY
Bit
D7
D6 D5
D4
D3
D2
D1
D0
R/W
W
W
W
W
W
W
W
W
Reset
X
X
X
X
X
X
0
0
Note: W = Write, X = Indeterminate.
Bit
Bit
Position Field
Reset
R/W State Description
Note: For the Stop-Mode Recovery Source, either SMR or SMR2 can be selected. If SMR2 is used
to select the Stop-Mode Recovery Source, bits D4–D2 of SMR must be 0. Not used in
conjunction with SMR Source.
PS022701-0104