m5m51016btp Renesas Electronics Corporation., m5m51016btp Datasheet - Page 25

• Manufacturer Part Number: m5m51016btp
• Description: Renesas 16-bit Single-chip Microcomputer M16c Family / M16c/20 Series
• Manufacturer: Renesas Electronics Corporation.

M30245 Group
Rev.2.00 Oct 16, 2006
REJ09B0340-0200
Figure 2.2.10. Operation timing of timer mode, pulse output function selected
Operation
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 Figures 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
page 16 of 354
pin reverses.
pin outputs an “L” level.
Set to “1” by software
(1) Start count
O
O
O
Cleared to “0” when interrupt request is accepted, or cleared by software
Performs count only for the period in which the TAi
Performs count only for the period in which the TAi
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
IN
IN
pin is at “H” level
pin is at “L” level
Time
2. Timer A