Renesas H8 Series - Page 344

Section 9 Timers
Rev. 7.00 Mar 10, 2005 page 302 of 652
REJ09B0042-0700
TCSRW
TMW
TCW
Internal data bus
PSS
Watchdog
on-chip
oscillator
φ
φ
W
/32
Internal reset signal or
interrupt request signal
Interrupt/reset
controller
[Legend]
TCSRW:
TCW:
TMW:
PSS:
Timer control/status register W
Timer counter W
Timer mode register W
Prescaler S
Figure 9.17(2) Block Diagram of Watchdog Timer
(H8/38124 Group)
Register Configuration
Table 9.16 shows the register configuration of the watchdog timer.
Table 9.16 Watchdog Timer Registers
Name Abbr. R/W Initial Value Address
Timer control/status register W TCSRW R/W H'AA H'FFB2
Timer counter W TCW R/W H'00 H'FFB3
Timer mode register W
*
TMW R/W H'FF H'FFF8
Clock stop register 2 CKSTPR2 R/W H'FF H'FFFB
Port mode register 2 PMR2 R/W H'D8 H'FFC9
Note: * This register is implemented on the H8/38124 Group only.