參數(shù)資料
型號: MC68HC05C9AFN
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PQCC44
封裝: PLASTIC, LCC-44
文件頁數(shù): 121/160頁
文件大?。?/td> 4128K
代理商: MC68HC05C9AFN
Capture/Compare Timer
Timer I/O Registers
MC68HC05C9A Rev. 4.0
General Release Specification
Capture/Compare Timer
NON-DISCLOSURE
AGREEMENT
REQUIRED
8.4.3 Timer Registers (TRH and TRL)
The timer registers, 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:
BIT15
BIT14
BIT13
BIT12
BIT11
BIT10
BIT9
BIT8
Write
Reset:
11111111
TRL
$0019
Bit 7
6
5
4
3
2
1
Bit 0
Read:
BIT7
BIT6
BIT5
BIT4
BIT3
BIT2
BIT1
BIT0
Write:
Reset:
11111100
= Unimplemented
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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