m30262f8gp Renesas Electronics Corporation., m30262f8gp Datasheet - Page 89

• Manufacturer Part Number: m30262f8gp
• Description: Renesas 16-bit Cmos Single-chip Microcomputer M16c Family / M16c/20 Series
• Manufacturer: Renesas Electronics Corporation.

Timer A
Table 1.12.3. Timer specifications in event counter mode
Note 1: This does not apply when the free-run function is selected.
Note 2: Timer A3 alone can be selected. Timer A2 is fixed to normal processing operation, and timer A4 is fixed to
Count source
Count operation
Divide ratio
Count start condition
Count stop condition
Interrupt request generation timing
TAi
TAi
Read from timer
Write to timer
Select function (Note 2)
IN
OUT
pin function
multiply-by-4 processing operation.
pin function
Preliminary Specifications Rev. 0.9
Specifications in this manual are tentative and subject to change.
(when processing two-phase pulse signal with timers A2, A3, and A4)
Item
• Two-phase pulse signals input to TAi
• Up count or down count can be selected by two-phase pulse signal
• When the timer overflows or underflows, the reload register content is
1/ (FFFF
1/ (n + 1) for down count
Count start flag is set (= 1)
Count start flag is reset (= 0)
Timer overflows or underflows
Two-phase pulse input (Set the TAi
Two-phase pulse input
(Set the TAi
Count value can be read out by reading timer A2, A3, or A4 register
• When counting stopped
• When counting in progress
• Normal processing operation (timer A2 and timer A3)
• Multiply-by-4 processing operation (timer A3 and timer A4)
When a value is written to timer A2, A3, or A4 register, it is written to both
reload register and counter
When a value is written to timer A2, A3, or A4 register, it is written to only
reload register. (Transferred to counter at next reload time.)
The timer counts up rising edges or counts down falling edges on the
TAi
If the phase relationship is such that the TAi
signal on the TAi
on the TAi
TAi
counts down rising and falling edges on the TAi
reloaded and the timer starts over again (Note 1)
Specification
IN
IN
pin when input signal on the TAi
pin goes “L” when the input signal on the TAi
16
OUT
Renesas Technology Corp.
- n + 1) for up count
OUT
TAi
TAi
TAi
TAi
pin correspondent port direction register to “0”.)
OUT
(i=2,3)
(i=3,4)
OUT
IN
IN
and TAi
OUT
Count up all edges
Count up all edges
Up
count
pin is “H”, the timer counts up rising and falling edges
IN
pins. If the phase relationship is such that the
Up
count
IN
Up
count
pin correspondent port direction register to “0”.)
n : Set value
Down
count
Count down all edges
IN
Count down all edges
OUT
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
or TAi
Down
count
pin is “H”.
IN
OUT
pin goes “H” when the input
OUT
Down
count
pin
OUT
and TAi
pin is “H”, the timer
M16C/26 Group
IN
pins.
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