TMP86CS64AFG Datasheet, PDF (110/202 Pages) Toshiba Semiconductor – 8 Bit Microcontroller

9. 16-Bit Timer/Counter2 (TC2)
9.2 Control
TMP86CS64AFG
9.2 Control
The timer/counter 2 is controlled by a timer/counter 2 control register (TC2CR) and a 16-bit timer register 2
(TC2DR).
TC2DR
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
(0025H,
TC2DRH (0025H)
TC2DRL (0024H)
0024H)
(Initial value: 1111 1111 1111 1111)
R/W
TC2CR
7
(0013H)
6
5
4
3
2
TC2S
TC2CK
1
0
TC2M (Initial value: **00 00*0)
TC2S
TC2CK
TC2M
TC2 start control
TC2 source clock select
Unit : [Hz]
TC2 operating mode
select
0:Stop and counter clear
1:Start
NORMAL1/2, IDLE1/2 mode
DV7CK = 0
DV7CK = 1
Divider
DV1CK = 0 DV1CK = 1 DV1CK = 0 DV1CK = 1
000
fc/2²³
fc/2²⁴
fs/2¹⁵
fs/2¹⁵
DV21
001
fc/2¹³
fc/2¹⁴
fs/2⁵
fs/2⁵
DV11
010
fc/2⁸
fc/2⁹
fc/2⁸
fc/2⁹
DV6
011
fc/2³
fc/2⁴
fc/2³
fc/2⁴
DV1
100
–
–
–
–
–
101
fs
fs
fs
fs
–
110
Reserved
111
External clock (TC2 pin input)
0:Timer/event counter mode
1:Window mode
SLOW1/2 SLEEP1/2
mode
mode
fs/2¹⁵
fs/2⁵
–
–
fc (Note7)
–
fs/2¹⁵
fs/2⁵
–
–
–
–
R/W
R/W
R/W
Note 1: fc: High-frequency clock [Hz], fs: Low-frequency clock [Hz], *: Don't care
Note 2: When writing to the Timer Register 2 (TC2DR), always write to the lower side (TC2DRL) and then the upper side
(TC2DRH) in that order. Writing to only the lower side (TC2DRL) or the upper side (TC2DRH) has no effect.
Note 3: The timer register 2 (TC2DR) uses the value previously set in it for coincidence detection until data is written to the upper
side (TC2DRH) after writing data to the lower side (TC2DRL).
Note 4: Set the mode and source clock when the TC2 stops (TC2S = 0).
Note 5: Values to be loaded to the timer register must satisfy the following condition.
TC2DR > 1 (TC2DR₁₅ to TC2DR₁₁ > 1 at warm up)
Note 6: If a read instruction is executed for TC2CR, read data of bit 7, 6 and 1 are unstable.
Note 7: The high-frequency clock (fc) canbe selected only when the time mode at SLOW2 mode is selected.
Note 8: On entering STOP mode, the TC2 start control (TC2S) is cleared to "0" automatically. So, the timer stops. Once the STOP
mode has been released, to start using the timer counter, set TC2S again.
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