h8s-2649 Renesas Electronics Corporation., h8s-2649 Datasheet - Page 599

• Manufacturer Part Number: h8s-2649
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
• Manufacturer: Renesas Electronics Corporation.

[Legend]
X:
Bit
3
2
1
0
Bit Name
STCS
SCK2
SCK1
SCK0
Don't care
Initial
Value
0
0
0
0
R/W
R/W
R/W
R/W
R/W
Frequency Multiplication Factor Switching Mode Select
System Clock Select 0 to 2
These bits select the bus master clock.
000: High-speed mode
001: Medium-speed clock is φ/2
Description
Selects the operation when the PLL circuit frequency
multiplication factor is changed.
0: Specified multiplication factor is valid after transition
1: Specified multiplication factor is valid immediately
010: Medium-speed clock is φ/4
011: Medium-speed clock is φ/8
100: Medium-speed clock is φ/16
101: Medium-speed clock is φ/32
11X: Setting prohibited
to software standby mode
after STC1 bit and STC0 bit are rewritten
Rev. 2.00 Dec. 05, 2005 Page 561 of 724
Section 20 Clock Pulse Generator
REJ09B0200-0200