M30622SAFP MITSUBISHI [Mitsubishi Electric Semiconductor], M30622SAFP Datasheet - Page 83
M30622SAFP
Manufacturer Part Number
M30622SAFP
Description
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Manufacturer
MITSUBISHI [Mitsubishi Electric Semiconductor]
Datasheet
1.M30622SAFP.pdf
(274 pages)
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Timer A
Table 1.14.3. Timer specifications in event counter mode (when processing two-phase pulse signal with timers A2, A3, and A4)
Note: This does not apply when the free-run function is selected.
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
IN
OUT
pin function
pin function
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
Two-phase pulse input
Count value can be read out by reading timer A2, A3, or A4 register
• When counting stopped
• When counting in progress
• Normal processing operation
• Multiply-by-4 processing operation
reloaded and the timer starts over again (Note)
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
pin when input signal 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
TAi
TAi
TAi
TAi
IN
(i=2,3)
OUT
OUT
IN
(i=3,4)
IN
pin goes “L” when the input signal on the TAi
16
- n + 1) for up count
OUT
Count up all edges
Count up all edges
Up
count
and TAi
OUT
pin is “H”, the timer counts up rising and falling edges
IN
Up
count
pins. If the phase relationship is such that the
Specification
Up
count
OUT
n : Set value
pin is “H”
IN
Down
count
Count down all edges
Count down all edges
or TAi
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
IN
OUT
Down
count
pin goes “H” when the input
OUT
pin
OUT
and TAi
Down
count
pin is “H”, the timer
M16C / 62A Group
Mitsubishi microcomputers
IN
pins.
IN
83
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