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CHAPTER 9 WATCH TIMER
User’s Manual U15798EJ2V0UD
9.3 Watch Timer Configuration
The watch timer consists of the following hardware.
Table 9-3. Watch Timer Configuration
Item
Configuration
Prescaler
11 bits
×
1, 5 bits
×
1
Control register
Watch timer operation mode register 0 (WTNM0)
Watch timer interrupt time select register (WTIM)
9.4 Registers to Control Watch Timer
The following two registers are used to control the watch timer.
• Watch timer operation mode register 0 (WTNM0)
• Watch timer interrupt time select register (WTIM)
(1) Watch timer operation mode register 0 (WTNM0)
This register enables/disables the watch timer operation, sets the 11-bit prescaler interval time, and controls the
5-bit counter operation.
WTNM0 is set by a 1-bit or 8-bit memory manipulation instruction.
RESET input sets the value of this register to 00H.
