HD6417660 RENESAS [Renesas Technology Corp], HD6417660 Datasheet - Page 379

• Manufacturer Part Number: HD6417660
• Description: Renesas 32-Bit RISC Microcomputer
• Manufacturer: RENESAS [Renesas Technology Corp]

Bit
15 to 13 
12
11
10
9
8
7
Bit Name
CKOEN

STC2
STC1
STC0

Initial
Value
All 0
1
0
0
0
0
0
R/W
R
R/W
R
R/W
R/W
R/W
R
Description
Reserved
These bits are always read as 0. The write value
should always be 0. If 1 is written to this bit, correct
operation cannot be guaranteed.
Clock Output Enable
When the HIZCNT bit in CMNCR is set to 1, CKOEN
specifies whether a clock is output from the CKIO pin,
or whether the CKIO pin is placed in the level-fixed
state during release of the standby mode. If CKOEN
is cleared to 0 and HIZCNT in CMNCR is set to 1, the
CKIO pin is fixed at low. Therefore, the malfunction of
an external circuit because of an unstable CKIO clock
during release of the standby mode can be prevented.
In clock operating mode 7, the CKIO pin functions as
an input regardless of this bit value.
0: CKIO pin goes low during release of the standby
1: Clock is output from CKIO pin
Reserved
This bit is always read as 0. The write value should
always be 0. If 1 is written to this bit, correct operation
cannot be guaranteed.
Frequency Multiplication Ratio
000: × 1 time
001: × 2 times
010: × 3 times
011: × 4 times
100: Setting prohibited
101: Setting prohibited
110: Setting prohibited
111: Setting prohibited
Reserved
This bit is always read as 0. The write value should
always be 0. If 1 is written to this bit, correct operation
cannot be guaranteed.
mode.
Rev. 1.00, 02/04, page 341 of 804