參數(shù)資料
型號(hào): MC68HC05CL48
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 1.802 MHz, MICROCONTROLLER, PQFP112
封裝: TQFP-112
文件頁數(shù): 99/145頁
文件大?。?/td> 673K
代理商: MC68HC05CL48
June 11, 1997
GENERAL RELEASE SPECIFICATION
MC68HC05CL48
TIMER
MOTOROLA
REV 2.0
8-5
The divide-by-4 prescaler is also reset and the counter resumes normal counting
operation. All of the ags and enable bits remain unaltered by this operation. If
access has previously been made to the high byte of the free running counter
($19 or $1B), then the reset counter operation terminates the access sequence.
Figure 8-3. Timer State Timing Diagram For Reset
8.1.2 Output Compare Registers
There are two output compare registers: output compare register 1 and output
compare register 2. Output compare registers can be used for several purposes
such as controlling an output waveform or indicating when a period of time has
elapsed. All bits are readable and writable and are not altered by the timer
hardware or reset. If the compare function is not needed, the two bytes of the
output compare register can be used as storage locations.
8.1.2.1
Output Compare Register 1
76543210
OC1H
$0015
READ
OC1:15
OC1:14
OC1:13
OC1:12
OC1:11
OC1:10
OC1:9
OC1:8
WRITE
RESET
UUUUUUUU
Internal Processor Clock
Internal Reset
Internal
Timer
Clocks
T00
T01
T10
T11
Counter (16bit)
RESET (External or POR)
$FFFC
$FFFD
$FFFE
$FFFF
NOTE: The Counter Register and Timer Control Register are the only ones affected by RESET.
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