HD6433937 Datasheet, PDF (114/521 Pages) Hitachi Semiconductor – Hardware Manual

Bits 1 and 0: Subactive mode clock select (SA1, SA0)
These bits select the CPU clock rate (ø_W/2, ø_W/4, or ø_W/8) in subactive mode. SA1 and SA0
cannot be modified in subactive mode.
Bit 1
SA1
0
0
1
Bit 0
SA0
0
1
*
Description
ø_W/8
ø_W/4
ø_W/2
(initial value)
*: Don’t care
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