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3 register descriptions, Table 16.3 register states in each operating mode – Renesas SH7781 User Manual

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16. Watchdog Timer and Reset (WDT)

Rev.1.00 Jan. 10, 2008 Page 762 of 1658
REJ09B0261-0100

16.3

Register Descriptions

Table 16.2 shows the registers of the WDT module. Table 16.3 shows the register states in each
operating mode.

Table 16.2 Register Configuration

Register Name

Abbreviation R/W

P4 Address

Area 7
Address

Access
Size

Sync
Clock

Watchdog timer stop time register WDTST

R/W

H'FFCC 0000

H'1FCC 0000

32

Pck

Watchdog timer control/status
register

WDTCSR

R/W

H'FFCC 0004

H'1FCC 0004

32

Pck

Watchdog timer base stop time
register

WDTBST

R/W

H'FFCC 0008

H'1FCC 0008

32

Pck

Watchdog timer counter

WDTCNT

R

H'FFCC 0010

H'1FCC 0010

32

Pck

Watchdog timer base counter

WDTBCNT

R

H'FFCC 0018

H'1FCC 0018

32

Pck

Table 16.3 Register States in Each Operating Mode

Register Name

Abbreviation

Power-on
Reset by
PRESET Pin

Power-on
Reset by
WDT/H-UDI

Manual
Reset by
WDT/
Multiple
Exception

Sleep/Deep
Sleep Mode
by SLEEP
Instruction

Watchdog timer stop time register WDTST H'0000

0000

Retained

Retained

Retained

Watchdog timer control/status
register

WDTCSR H'0000

0000

Retained Retained Retained

Watchdog timer base stop time
register

WDTBST H'0000

0000

Retained Retained

Retained

Watchdog timer counter

WDTCNT

H'0000 0000

H'0000 0000 Retained

Retained

Watchdog timer base counter

WDTBCNT

H'0000 0000

H'0000 0000 Retained

Retained