Time Base Timer (Tbt); Time Base Timer; Configuration; Control - Toshiba TLCS-870/C Series Manual

7. Time Base Timer (TBT)

The time base timer generates time base for key scanning, dynamic displaying, etc. It also provides a time base
timer interrupt (INTTBT).

7.1 Time Base Timer

7.1.1 Configuration

23 15
fc/2 or fs/2
21 13
fc/2 or fs/2
16 8
fc/2 or fs/2
14 6
fc/2 or fs/2
13 5
fc/2 or fs/2
12 4
fc/2 or fs/2
11 3
fc/2 or fs/2
9
fc/2 or fs/2

7.1.2 Control

Time Base Timer is controlled by Time Base Timer control register (TBTCR).
Time Base Timer Control Register
7
TBTCR
(DVOEN)
(0036H)
Time Base Timer
TBTEN
enable / disable
Time Base Timer interrupt
TBTCK
Frequency select : [Hz]
Note 1: fc; High-frequency clock [Hz], fs; Low-frequency clock [Hz], *; Don't care
MPX
Source clock
3
TBTCK TBTEN
TBTCR
Time base timer control register
Figure 7-1 Time Base Timer configuration
6 5 4
(DVOCK) (DV7CK) TBTEN
0: Disable
1: Enable
000
001
010
011
100
101
110
111
Falling edge
detector
3 2 1
TBTCK
NORMAL1/2, IDLE1/2 Mode
DV7CK = 0 DV7CK = 1
23
fc/2 fs/2
21
fc/2 fs/2
16
fc/2 fs/2
14
fc/2 fs/2
13
fc/2 fs/2
12
fc/2 fs/2
11
fc/2 fs/2
9
fc/2
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TMP86PM29BUG
IDLE0, SLEEP0
release request
INTTBT
interrupt request
0
(Initial Value: 0000 0000)
SLOW1/2
SLEEP1/2
Mode
15 15
fs/2
13 13
fs/2
8
–
6
–
5
–
4
–
3
–
fs/2 –
R/W