h8s-2628 Renesas Electronics Corporation., h8s-2628 Datasheet - Page 532

• Manufacturer Part Number: h8s-2628
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
• Manufacturer: Renesas Electronics Corporation.

Section 20 Clock Pulse Generator
20.1
The on-chip clock pulse generator has the following registers.
20.1.1
SCKCR performs clock output control, selection of operation when the PLL circuit frequency
multiplication factor is changed, and medium-speed mode control.
Rev. 3.00 Oct 04, 2005 page 492 of 598
REJ09B0155-0300
Bit
7
6 to
4
3
System clock control register (SCKCR)
Low-power control register (LPWRCR)
Bit Name
PSTOP
STCS
System Clock Control Register (SCKCR)
Register Descriptions
Initial Value
0
All 0
0
R/W
R/W
R/W
Description
Controls
High-speed Mode, Medium-Speed Mode
0:
1: Fixed high
Sleep Mode
0:
1: Fixed high
Software Standby Mode
0: Fixed high
1: Fixed high
Hardware Standby Mode
0: High impedance
1: High impedance
Reserved
These bits are always read as 0.
Frequency Multiplication Factor Switching Mode
Select
Selects the operation when the PLL circuit
frequency multiplication factor is changed.
0: Specified multiplication factor is valid after
1: Specified multiplication factor is valid
Clock Output Disable
transition to software standby mode
immediately after STC1 bit and STC0 bit are
rewritten
output
output
output.