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M16C/62 Fiches technique(PDF) 359 Page - Renesas Technology Corp

No de pièce M16C/62
Description  16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY / M16C/60 SERIES
PDF  615 Pages
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Fabricant  RENESAS [Renesas Technology Corp]
Site Internet  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

M16C/62 Fiches technique(HTML) 359 Page - Renesas Technology Corp

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Timer B
Mitsubishi microcomputers
M16C / 62A Group
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
2-42
In timer mode, choose functions from those listed in Table 2.3.1. Operations of the circled items are
described below. Figure 2.3.4 shows the operation timing, and Figure 2.3.5 shows the set-up procedure.
2.3.2 Operation of Timer B (timer mode)
Item
Count source
Set-up
O
Internal count source (f1 / f8 / f32 / fc32)
Operation
Table 2.3.1. Choosed functions
(1) Setting the count start flag to “1” causes the counter to perform a down count on the count
source.
(2) If an underflow occurs, the content of the reload register is reloaded, and the counter contin-
ues counting. At this time, the timer Bi interrupt request bit goes to “1”.
(3) Setting the count start flag to “0” causes the counter to hold its value and to stop.
Figure 2.3.4. Operation timing of timer mode
FFFF16
n
000016
Time
Count start flag
Timer Bi interrupt
request bit
“1”
“1”
n = reload register content
Set to “1” by software
“0”
“0”
Set to “1” by software
Cleared to “0” by
software
(2) Underflow
(3) Stop count
(1) Start count
Cleared to “0” when interrupt request is accepted, or cleared by software
Start count
again



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