tmp86c408idmg TOSHIBA Semiconductor CORPORATION, tmp86c408idmg Datasheet - Page 64

• Manufacturer Part Number: tmp86c408idmg
• Description: Cmos 8-bit Microcontroller
• Manufacturer: TOSHIBA Semiconductor CORPORATION

6.1 Time Base Timer
6. Time Base Timer (TBT)
Example :Set the time base timer frequency to fc/2
6.1.3 Function
Note 2: The interrupt frequency (TBTCK) must be selected with the time base timer disabled (TBTEN="0"). (The interrupt fre-
output of the timing generator which is selected by TBTCK. ) after time base timer has been enabled.
interrupt period ( Figure 6-2 ).
Table 6-1 Time Base Timer Interrupt Frequency ( Example : fc = 16.0 MHz, fs = 32.768 kHz )
An INTTBT ( Time Base Timer Interrupt ) is generated on the first falling edge of source clock ( The divider
The divider is not cleared by the program; therefore, only the first interrupt may be generated ahead of the set
quency must not be changed with the disable from the enable state.) Both frequency selection and enabling can be per-
formed simultaneously.
TBTCK
000
001
010
100
101
011
110
111
Source clock
TBTCR<TBTEN>
INTTBT
LD
LD
DI
SET
NORMAL1/2, IDLE1/2 Mode
Figure 6-2 Time Base Timer Interrupt
DV7CK = 0
(TBTCR) , 00000010B
(TBTCR) , 00001010B
(EIRL) . 6
1953.13
3906.25
244.14
976.56
7812.5
31250
1.91
7.63
Enable TBT
16
[Hz] and enable an INTTBT interrupt.
Time Base Timer Interrupt Frequency [Hz]
Page 54
NORMAL1/2, IDLE1/2 Mode
Interrupt period
DV7CK = 1
16384
1024
2048
4096
128
512
1
4
; TBTCK ← 010
; TBTEN ← 1
; IMF ← 0
SLOW1/2, SLEEP1/2 Mode
1
4
–
–
–
–
–
–
TMP86C408IDMG