256
Chapter 9
Timer / Counter (Real Time Pulse Unit)
Preliminary User’s Manual U14913EE1V0UM00
9.2 Timer
E
9.2.1 Features
(timer
E)
The 3 x 6 channels 16/32-bit multi purpose timers En (TMEn) (n = 0 to 2) operate as
•
Pulse interval and frequency measurement counter
•
Up/down event counter
•
Interval timer
•
Programmable pulse output
•
PWM output timer
9.2.2 Function overview (timer E)
•
16-bit timer/counter (TBASE0n, TBASE1n): 2 channels each unit n (n = 0 to 2)
•
Bit length
- Timer En registers (TBASE0n, TBASE1n): 16 bits
- During cascade operation: 32 bits (higher 16 bits:TBASE1n, lower 16 bits: TBASE0n)
•
Capture/compare register
- In 16-bit mode: 6
- In 32-bit: 4 (capture mode only)
•
Count clock division selectable by prescaler (max. frequency of count clock: 10 MHz @ f
CPU
=
20 MHz)
•
Interrupt request sources
- Compare-match interrupt requests: 6 types
Perform comparison with sub-channel n capture/compare register and generate the TINTCCExn
interrupt upon compare match.
- Timer counter overflow interrupt requests: 2 types
The TINTOVE0n (TINTOVE1n) interrupt is generated when the count value of TBASE0n
(TBASE1n) becomes FFFFH.
•
Capture request
- Count values of TBASE0n, TBASE1n can be latched using external pin (INTPExn)
Note 1, Note 2
•
PWM output function
- Control of the outputs of pins TOE1n to TOE4n in the compare mode and PWM output can be per-
formed using the compare match timing of sub-channels 1 to 4 and the zero count signal of the
timer counter.
•
Timer count operation with external clock input
Note 2
- Timer count operation can be performed with the pin TIEn clock input signal.
•
Timer count enable operation
Note 3
with external pin input
Note 2
- Timer count enable operation can be performed with the TCLREn pin input signal.
•
Timer counter clear control
Note 3, Note 4
with external pin input
Note 2
- Timer counter clear operation can be performed with the TCLREn pin input signal.
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