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Section 5 Power-Down Modes
Rev. 6.00 Sep 12, 2006 page 91 of 526
REJ09B0326-0600
Bits 6 to 4
Standby Timer Select 2 to 0 (STS2 to STS0):
These bits designate the time the
CPU and peripheral modules wait for stable clock operation after exiting from standby mode or
watch mode to active mode due to an interrupt. The designation should be made according to the
clock frequency so that the waiting time is at least 10 ms.
Bit 6: STS2
Bit 5: STS1
Bit 4: STS0
Description
0
0
0
Wait time = 8,192 states
(initial value)
1
Wait time = 16,384 states
1
0
Wait time = 32,768 states
1
Wait time = 65,536 states
1
*
*
Wait time = 131,072 states
Legend:
*
Don’t care
Bit 3
Low Speed on Flag (LSON):
This bit chooses the system clock (
φ
) or subclock (
φ
SUB
) as
the CPU operating clock when watch mode is cleared. The resulting operation mode depends on
the combination of other control bits and interrupt input.
Bit 3: LSON
Description
0
The CPU operates on the system clock (
φ
) (initial
value)
1
The CPU operates on the subclock (
φ
SUB
)
Bits 2
Reserved Bits:
Bit 2 is reserved: it is always read as 1 and cannot be modified.
Bits 1 and 0
Active (Medium-Speed) Mode Clock Select (MA1, MA0):
Bits 1 and 0 choose
φ
osc
/128,
φ
osc
/64,
φ
osc
/32, or
φ
osc
/16 as the operating clock in active (medium-speed) mode and
sleep (medium-speed) mode. MA1 and MA0 should be written in active (high-speed) mode or
subactive mode.
Bit 1: MA1
Bit 0: MA0
Description
0 0
φ
osc
/16
1
φ
osc
/32
1 0
φ
osc
/64
1
φ
osc
/128 (initial
value)
Summary of Contents for F-ZTAT H8/3642A Series
Page 6: ...Rev 6 00 Sep 12 2006 page iv of xx ...
Page 8: ...Rev 6 00 Sep 12 2006 page vi of xx ...
Page 22: ...Rev 6 00 Sep 12 2006 page xx of xx ...
Page 124: ...Section 5 Power Down Modes Rev 6 00 Sep 12 2006 page 102 of 526 REJ09B0326 0600 ...
Page 188: ...Section 6 ROM Rev 6 00 Sep 12 2006 page 166 of 526 REJ09B0326 0600 ...
Page 190: ...Section 7 RAM Rev 6 00 Sep 12 2006 page 168 of 526 REJ09B0326 0600 ...
Page 298: ...Section 9 Timers Rev 6 00 Sep 12 2006 page 276 of 526 REJ09B0326 0600 ...
Page 378: ...Section 12 A D Converter Rev 6 00 Sep 12 2006 page 356 of 526 REJ09B0326 0600 ...
Page 446: ...Section 13 Electrical Characteristics Rev 6 00 Sep 12 2006 page 424 of 526 REJ09B0326 0600 ...