参数资料
型号: TMP86CH09NG
元件分类: 微控制器/微处理器
英文描述: 8-BIT, MROM, 16 MHz, MICROCONTROLLER, PDIP32
封装: 0.400 INCH, 1.78 MM PITCH, LEAD FREE, PLASTIC, SDIP-32
文件页数: 85/120页
文件大小: 1743K
代理商: TMP86CH09NG
Page 56
6. Time Base Timer (TBT)
6.1 Time Base Timer
TMP86FH09ANG
Note 2: The interrupt frequency (TBTCK) must be selected with the time base timer disabled (TBTEN="0"). (The interrupt fre-
quency must not be changed with the disable from the enable state.) Both frequency selection and enabling can be per-
formed simultaneously.
6.1.3 Function
An INTTBT ( Time Base Timer Interrupt ) is generated on the first falling edge of source clock ( The divider
output of the timing generato which is selected by TBTCK. ) after time base timer has been enabled.
The divider is not cleared by the program; therefore, only the first interrupt may be generated ahead of the set
interrupt period ( Figure 6-2 ).
Figure 6-2 Time Base Timer Interrupt
Example :Set the time base timer frequency to fc/216 [Hz] and enable an INTTBT interrupt.
LD
(TBTCR) , 00000010B
; TBTCK
← 010
LD
(TBTCR) , 00001010B
; TBTEN
← 1
DI
; IMF
← 0
SET
(EIRL) . 6
Table 6-1 Time Base Timer Interrupt Frequency ( Example : fc = 16.0 MHz, fs = 32.768 kHz )
TBTCK
Time Base Timer Interrupt Frequency [Hz]
NORMAL1/2, IDLE1/2 Mode
SLOW1/2, SLEEP1/2 Mode
DV7CK = 0
DV7CK = 1
000
1.91
1
001
7.63
4
010
244.14
128
011
976.56
512
100
1953.13
1024
101
3906.25
2048
110
7812.5
4096
111
31250
16384
Source clock
Enable TBT
Interrupt period
TBTCR<TBTEN>
INTTBT
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