h8s-2635 Renesas Electronics Corporation., h8s-2635 Datasheet - Page 1045

• Manufacturer Part Number: h8s-2635
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
• Manufacturer: Renesas Electronics Corporation.

Bit 3—Oscillation Circuit Feedback Resistance Control Bit (RFCUT): This bit turns the
internal feedback resistance of the main clock oscillation circuit ON/OFF.
Bit 2—Reserved: Only write 0 to this bit.
23B.2.4 Timer Control/Status Register (TCSR)
Notes: 1. Only write 0 to clear the flag.
TCSR is an 8-bit read/write register that selects the clock input to WDT1 TCNT and the mode.
Here, we describe bit 4. For details of the other bits in this register, see section 12.2.2, Timer
Control/Status Register (TCSR).
The TCSR is initialized to H'00 at a reset and when in hardware standby mode. It is not initialized
in software standby mode.
HD6432638UF, HD64F2638WF, HD6432638WF, HD64F2639UF, HD6432639UF, HD64F2639WF,
Bit 3
RFCUT
0
1
2. Bit 4 (PSS) in TCSR of WDT1 is valid in the U-mask and W-mask versions, and
Description
When the main clock is oscillating, sets the feedback resistance ON. When the main
clock is stopped, sets the feedback resistance OFF.
Sets the feedback resistance OFF.
H8S/2635 Group. In versions other than the U-mask and W-mask versions, and
H8S/2635 Group, however, the PSS bit must always be written with 0 since no subclock
functions are available.
Section 23B Power-Down Modes [HD64F2636UF, HD6432636UF, HD64F2638UF,
HD6432639WF, HD64F2630UF, HD6432630UF, HD64F2630WF, HD6432630WF]
*
IT
*
Rev. 6.00 Feb 22, 2005 page 985 of 1484
NMI
REJ09B0103-0600
(Initial value)