upd70f3422gj-gae-qs-ax Renesas Electronics Corporation., upd70f3422gj-gae-qs-ax Datasheet - Page 501

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

Watchdog Timer (WDT)
Table 15-1
Table 15-2
15.2 Watchdog Timer Registers
Note
The Watchdog Timer is controlled by means of the following registers:
Watchdog Timer registers overview
The registers WDCS and WDTM are protected against accidental changes. A
special write procedure, employing the WCMD register, ensures that these
registers are not easily rewritten in case of a program hang-up.
Their contents can only be changed after a reset.
In addition, the registers are write-protected when the timer is running. Their
protection status is indicated in the WDTM register.
WDT register base address
Only byte access is supported for the registers WDCS, WCMD and WDTM.
The registers are allocated at even addresses. Thus, they cannot be written by
a consecutive byte write sequence or a consecutive half word or word write
sequence.
Preliminary User’s Manual U17566EE1V2UM00
Timer
WDT
Register name
Watchdog Timer clock selection register
Watchdog Timer command protection register
Watchdog Timer mode register
Watchdog Timer command status register
Base address
FFFF F6C0
H
Shortcut
WDCS
WCMD
WDTM
WPHS
Address
<base>
<base> + 2
<base> + 4
<base> + 6
Chapter 15
H
H
H
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