參數(shù)資料
型號: MC68HC705C9ACS
廠商: MOTOROLA INC
元件分類: 微控制器/微處理器
英文描述: 8-BIT, UVPROM, 2.1 MHz, MICROCONTROLLER
文件頁數(shù): 155/177頁
文件大?。?/td> 1941K
代理商: MC68HC705C9ACS
Capture/Compare Timer
Timer I/O Registers
MC68HC705C9A — Rev. 4.0
Advance Information
MOTOROLA
Capture/Compare Timer
79
8.4.3 Timer Registers
The timer registers (TRH and TRL), shown in Figure 8-4, contains the
current high and low bytes of the 16-bit counter. Reading TRH before
reading TRL causes TRL to be latched until TRL is read. Reading TRL
after reading the timer status register clears the timer overflow flag
(TOF). Writing to the timer registers has no effect.
Figure 8-4. Timer Registers (TRH and TRL)
TRH
$0018
Bit 7
6
5
4
3
2
1
Bit 0
Read:
Bit 15
Bit 14
Bit 13
Bit 12
Bit 11
Bit 10
Bit 9
Bit 8
Write
Reset:
11
TRL
$0019
Bit 7
6
5
4
3
2
1
Bit 0
Read:
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Write:
Reset:
11
00
= Unimplemented
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