upd70f3422gj-gae-qs-ax Renesas Electronics Corporation., upd70f3422gj-gae-qs-ax Datasheet - Page 150

• Manufacturer Part Number: upd70f3422gj-gae-qs-ax
• Description: 32-bit Single-chip Microcontroller
• Manufacturer: Renesas Electronics Corporation.

Chapter 4
150
Initial Value
Address
Caution
Access
4.2.3 Control registers for peripheral clocks
Note
(1)
This section describes the registers used for specifying the sources and
operation modes for the clocks provided for the on-chip peripherals.
These clocks are the clocks for the Watchdog and Watch Timers, the SPCLKn
clocks, FOUTCLK, and IICLK.
Be aware that the WCC register controls not only the generation of the
Watchdog Timer clock. It defines also the run/stop mode of the sub and ring
oscillators when certain power save modes are entered.
WCC - Watchdog Timer clock control register
The 8-bit WCC register controls the Watchdog Timer clock. This register can
be changed only once after any reset.
Writing to this register is protected by a special sequence of instructions.
Please refer to “PHCMD - Command protection register” on page 140 for
details.
This register can be read/written in 8-bit units.
FFFF F826
00
Bit 1 of WCC must be set to “1” after reset and must not be altered afterwards.
Preliminary User’s Manual U17566EE1V2UM00
SOSTP
H
R/W
. The register is initialized by any reset.
7
H
WPS2
R/W
.
6
WPS1
R/W
5
WPS0
R/W
4
ROSTP
R/W
3
SOSCW
R/W
2
R/W
Clock Generator
1
1
WDTSEL0
R/W
0