R0K572030S000BE Renesas Electronics America, R0K572030S000BE Datasheet - Page 714

• Manufacturer Part Number: R0K572030S000BE
• Description: KIT DEV FOR SH7203
• Manufacturer: Renesas Electronics America
• Series: Renesas Starter Kits (RSK)r
• Type: MCUr

Specifications of R0K572030S000BE

• Contents: CPU Board, LCD Module, E10A-Lite Emulator, Cable, QuickStart Guide and CD-ROM
• Silicon Manufacturer: Renesas
• Kit Contents: Board
• Silicon Family Name: SH7203
• Silicon Core Number: R5S72030W200FP
• Tool / Board Applications: General Purpose MCU, MPU, DSP, DSC
• Mcu Supported Families: SH7203
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• For Use With/related Products: SH7203
• Lead Free Status / Rohs Status: Compliant

Section 13 Watchdog Timer (WDT)
13.3.4
The watchdog timer counter (WTCNT), watchdog timer control/status register (WTCSR), and
watchdog reset control/status register (WRCSR) are more difficult to write to than other registers.
The procedures for reading or writing to these registers are given below.
(1)
These registers must be written by a word transfer instruction. They cannot be written by a byte or
longword transfer instruction.
When writing to WTCNT, set the upper byte to H'5A and transfer the lower byte as the write data,
as shown in figure 13.2. When writing to WTCSR, set the upper byte to H'A5 and transfer the
lower byte as the write data. This transfer procedure writes the lower byte data to WTCNT or
WTCSR.
Rev. 3.00 Sep. 28, 2009 Page 682 of 1650
REJ09B0313-0300
WTCNT write
WTCSR write
Writing to WTCNT and WTCSR
Address: H'FFFE0002
Address: H'FFFE0000
Notes on Register Access
Figure 13.2 Writing to WTCNT and WTCSR
15
15
H'5A
H'A5
8
8
7
7
Write data
Write data
0
0