參數(shù)資料
型號: DMC73C167
英文描述: 8Bit Single Chip Microcontroller
中文描述: 8位單芯片微控制器
文件頁數(shù): 37/90頁
文件大?。?/td> 742K
代理商: DMC73C167
37
8Bit Single Chip Microcontroller
DMC73C167
Figure 5-4. Additional Circuit for External Input
5.5 Programmable Timer / Event Counter
The DMC73C167 has three on-chip programmable timers with individual start/stop
control bits. Timer 1 (shown in Figure 5-5) is a 16-bit timer. It has a 16-bit capture latch and
a 5-bit nonreadable prescaler with a 5-bit reload register. Timer 2 and Timer 3 (shown in
Figures 5-6 and 5-7) are 8-bit timers. They have an 8-bit capture latch and a 2-bit nonreadable
prescaler with a 2-bit reload register.
Table 5-17. Timer Mode and Clock Sources
Timer
Mode
Clock Source
Capture Latch
Trigger
Port A3 (INT1)
Interrupt
Control
Register
T1MSD (P20)
T1LSD (P21)
T1CTL0 (P22)
T1CTL1 (P23)
T2DATA (P24)
T2CTL (P25)
T3DATA (P26)
T3CTL (P27)
RTC mode
Internal Fosc/4
INT2_0
1
Event counter
mode
RTC mode
Event counter mode External port A2
RTC mode
Cascade
External port A1
active edge
2
Internal Fosc/4
Port A4 (INT3_0)
active edge
Port A5 (INT5_0)
active edge
INT2_1
3
Internal Fosc/4
Timer 2 underflow
INT3_1
Note : This active edge is determined by the INT1, INT3_0, and INT5_0 EDGE bit of
the IOCTL2 (P2) register.
VCC
VSS
Register
Input
Diode
Diode
DMC73C167
INT1
INT3_0
INT5_0
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