h8s-2649 Renesas Electronics Corporation., h8s-2649 Datasheet - Page 598

• Manufacturer Part Number: h8s-2649
• 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. For details on LPWRCR, see
section 21.1.2, Low-Power Control Register (LPWRCR).
• System clock control register (SCKCR)
• Low-power control register (LPWRCR)
20.1.1
SCKCR performs φ clock output control, selection of operation when the PLL circuit frequency
multiplication factor is changed, and medium-speed mode control.
Rev. 2.00 Dec. 05, 2005 Page 560 of 724
REJ09B0200-0200
Bit
7
6 to 4 
Bit Name
PSTOP
Register Descriptions
System Clock Control Register (SCKCR)
0
Initial
Value
All 0
R/W
R/W

Description
φ Clock Output Disable
Controls φ output.
High-speed Mode, Medium-Speed Mode
0: φ output
1: Fixed high
Sleep Mode
0: φ output
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.