参数资料
型号: MC68HC05J1AVDW
厂商: MOTOROLA INC
元件分类: 微控制器/微处理器
英文描述: 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDSO20
封装: SOIC-20
文件页数: 102/128页
文件大小: 1279K
代理商: MC68HC05J1AVDW
Multifunction Timer
Timer Status and Control Register
MC68HC05J1A — Rev. 3.0
Technical Data
MOTOROLA
Multifunction Timer
75
A 15-stage ripple counter is the core of the timer. The value of the first
eight stages is readable at any time from the read-only timer counter
register (TCNTR).
Power-on clears the entire counter chain and begins clocking the
counter. After 4064 cycles, the power-on reset circuit is released,
clearing the counter again and allowing the MCU to come out of reset.
A timer overflow function at the eighth counter stage allows a timer
interrupt every 1024 internal clock cycles.
Address:
$0009
Bit 7
6
54321
Bit 0
Read:
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Write:
Reset:
00
000000
= Unimplemented
Figure 8-3. Timer Counter Register (TCNTR)
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