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RL78/G1A
CHAPTER 8 INTERVAL TIMER
CHAPTER 8 12-BIT INTERVAL TIMER
8.1 Functions of 12-bit Interval Timer
An interrupt (INTIT) is generated at any previously specified time interval. It can be utilized for wakeup from STOP
mode and triggering an A/D converter’s SNOOZE mode.
8.2 Configuration of 12-bit Interval Timer
The interval timer includes the following hardware.
Table 8-1. Configuration of 12-bit Interval Timer
Item Configuration
Counter 12-bit
counter
Peripheral enable register 0 (PER0)
Subsystem clock supply mode control register (OSMC)
Control registers
Interval timer control register (ITMC)
Figure 8-1. Block Diagram of 12-bit Interval Timer
WUTMM
CK0
f
SUB
f
IL
RINTE
ITCMP11 to ITCMP0
Count
clock
12-bit counter
Clear
Subsystem clock supply
mode control register (OSMC)
mode control register (OSMC)
Interval timer control
register (ITMC)
register (ITMC)
Interrupt request
signal (INTIT)
signal (INTIT)
Count
operation
controller
Selector
Match signal
Internal bus
<R>
Caution The subsystem clock (f
SUB
) is selectable as a count clock in the 48- and 64-pin products.
<R>
R01UH0305EJ0200 Rev.2.00
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Jul 04, 2013