M30622MA-XXXFP RENESAS [Renesas Technology Corp], M30622MA-XXXFP Datasheet - Page 305

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M30622MA-XXXFP

Manufacturer Part Number
M30622MA-XXXFP
Description
16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
Timer A
290
Operation
Figure 2.2.10. Operation timing of timer mode, pulse output function selected
2.2.4 Operation of Timer A (timer mode, pulse output function selected)
Count start flag
Pulse output from
TAi
Timer Ai interrupt
request bit
In timer mode, choose functions from those listed in Table 2.2.3. Operations of the circled items are
described below. Figure 2.2.10 shows the operation timing, and Figure 2.2.11 shows the set-up proce-
dure.
OUT
pin
(1) Setting the count start flag to “1” causes the counter to perform a down count on the count
(2) If an underflow occurs, the content of the reload register is reloaded and the count continues.
(3) Setting the count start flag to “0” causes the counter to hold its value and to stop. Also, the
Table 2.2.3. Choosed functions
FFFF
0000
Count source
Pulse output function
Gate function
source.
At this time, the timer Ai interrupt request bit goes to “1”. Also, the output polarity of the
TAi
TAi
“H”
“1”
“0”
“L”
“1”
“0”
16
16
n
OUT
OUT
Item
n = reload register content
pin reverses.
pin outputs an “L” level.
Set to “1” by software
(1) Start count
O
O
O
Performs count only for the period in which the TAi
Performs count only for the period in which the TAi
Cleared to “0” when interrupt request is accepted, or cleared by software
Internal count source(f
No pulses output
Pulses output
No gate function
(2) Underflow
Cleared to “0” by
software
(3) Stop count
1
/ f
8
/ f
32
Start count again
/ fc
32
)
Set-up
Set to “1” by software
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
IN
IN
pin is at “L” level
pin is at “H” level
Mitsubishi microcomputers
M16C / 62 Group
Time

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