upd78f0148m1gka1-9eu Renesas Electronics Corporation., upd78f0148m1gka1-9eu Datasheet - Page 210
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upd78f0148m1gka1-9eu
Manufacturer Part Number
upd78f0148m1gka1-9eu
Description
8-bit Single-chip Microcontrollers
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.UPD78F0148M1GKA1-9EU.pdf
(668 pages)
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8.4
8.4.1
of the count value preset to 8-bit timer compare register 5n (CR5n).
TM5n value cleared to 0 and an interrupt request signal (INTTM5n) is generated.
(TCL5n).
210
8-bit timer/event counter 5n operates as an interval timer that generates interrupt requests repeatedly at intervals
When the count value of 8-bit timer counter 5n (TM5n) matches the value set to CR5n, counting continues with the
The count clock of TM5n can be selected with bits 0 to 2 (TCL5n0 to TCL5n2) of timer clock selection register 5n
<1> Set the registers.
<2> After TCE5n = 1 is set, the count operation starts.
<3> If the values of TM5n and CR5n match, INTTM5n is generated (TM5n is cleared to 00H).
<4> INTTM5n is generated repeatedly at the same interval. Clear TCE5n to 0 to stop the count operation.
Caution Do not write other values to CR5n during operation.
Remark Interval time = (N + 1) × t
Setting
TM5n count value
Operations of 8-Bit Timer/Event Counters 50 and 51
Operation as interval timer
• TCL5n:
• CR5n:
• TMC5n:
Count clock
INTTM5n
N = 01H to FEH
n = 0, 1
TCE5n
CR5n
Select the count clock.
Compare value
Stop the count operation, select the mode in which clear & start occurs on a match of TM5n
and CR5n.
(TMC5n = 0000×××0B × = Don’t care)
Count start
00H
N
CHAPTER 8 8-BIT TIMER/EVENT COUNTERS 50 AND 51
01H
Figure 8-11. Interval Timer Operation Timing (1/2)
t
User’s Manual U15947EJ3V1UD
(a) Basic operation
N
Clear
00H
Interrupt acknowledged
N
01H
Interval time
N
Clear
00H
Interrupt acknowledged
N
01H
Interval time
N
N
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