tmp88fw45afg TOSHIBA Semiconductor CORPORATION, tmp88fw45afg Datasheet - Page 123

• Manufacturer Part Number: tmp88fw45afg
• Description: 8 Bit Microcontroller Tlcs-870/x Series
• Manufacturer: TOSHIBA Semiconductor CORPORATION

11.3
11.3.1
TimerCounter 3 has three types of operating modes: timer, event counter and capture modes.
Function
and the timer register 3A (TC3DRA) value is detected, an INTTC3 interrupt is generated and the up-counter is
cleared. After being cleared, the up-counter restarts counting. Setting TC3CR<ACAP> to 1 captures the up-
counter value into the timer register 3B (TC3DRB) with the auto-capture function. The count value during timer
operation can be checked by executing the read instruction to TC3DRB.
In the timer mode, the up-counter counts up using the internal clock. When a match between the up-counter
Timer mode
Note:00H which is stored in the up-counter immediately after detection of a match is not captured into TC3DRB.
(Figure 11-2)
Table 11-1 Source Clock for TimerCounter 3 (Example: fc = 20 MHz)
TC3CK
000
001
010
011
100
101
110
Clock
TC3DRA
Up-counter
TC3DRB
Resolution
409.6
204.8
102.4
51.2
25.6
12.8
[μs]
6.4
Figure 11-2 Auto-Capture Function
DV1CK = 0
Maximum Time Setting
C6
C6
Note: In the case that TC3DRB is C8H
104.45
52.22
26.11
13.06
6.53
3.06
1.63
[ms]
Match detect
Page 109
NORMAL, IDLE mode
C7
C7
C8
Resolution
C8
819.2
409.6
204.8
102.4
51.2
25.6
12.8
[μs]
00
C8
DV1CK = 1
Maximum Time Setting
01
208.90
104.45
52.22
26.11
13.06
6.53
3.06
[ms]
01
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