RL78/D1A User's Manual: Hardware - Renesas

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Preliminary document
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RL78/D1A CHAPTER 6 TIMER ARRAY UNIT
6.1 Functions of Timer Array Unit
The timer array unit has the following functions.
6.1.1 Functions of each channel when it operates independently
Single-operation functions are those functions that can be used for any channel regardless of the operation mode of the
other channel (for details, refer to 6.6.1 Overview of single-operation function and combination operation-function).
(1) Interval timer
Each timer of a unit can be used as a reference timer that generates an interrupt (INTTMmn) at fixed intervals.
Operation clock
Compare operation
Channel n
Interrupt signal
(INTTMmn)
(2) Square wave output
A toggle operation is performed each time INTTMmn is generated and a square wave with a duty factor of 50% is
output from a timer output pin (TOmn).
Operation clock
Remark m: Unit number (m = 0 to 2)
n: Channel number (n = 0 to 7)
Compare operation
Channel n
Timer output
(TOmn)
(3) External event counter
Each timer of a unit can be used as an event counter that generates an interrupt when the number of the valid
edges of a signal input to the timer input pin (TImn) has reached a specific value.
Timer input
(TImn)
Edge detection
Compare operation
Channel n
Interrupt signal
(INTTMmn)
(4) Divider function
A clock input from a timer input pin (TImn) is divided and output from an output pin (TOmn).
Timer input
(TImn)
Compare operation
Channel 0
Timer output
(TOmn)
(5) Input pulse interval measurement
Counting is started by the valid edge of a pulse signal input to a timer input pin (TImn). The count value of the
timer is captured at the valid edge of the next pulse. In this way, the interval of the input pulse can be measured.
Edge detection
Timer input
(TImn)
Channel n
Capture operation
xxH
Capture
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