參數(shù)資料
型號: MC68HCL05C8A
廠商: Motorola, Inc.
英文描述: 8-Bit Microcontroller Units (MCU).(8位微控制器)
中文描述: 8位微控制器單元(MCU)。(8位微控制器)
文件頁數(shù): 58/156頁
文件大?。?/td> 755K
代理商: MC68HCL05C8A
L
G
R
Timer
General Release Specification
MC68HC05C8A
Rev. 3.0
58
Timer
MOTOROLA
the time used in the input capture software routine and its interaction
with the main program to determine the minimum pulse period.
A read of the input capture register LSB ($15) does not inhibit the free-
running counter transfer, since they occur on opposite edges of the
internal bus clock.
Figure 8-3
shows the logic of the input capture
function.
Figure 8-3. Input Capture Operation
8.6 Timer Control Register
The TCR is a read/write register containing five control bits. Three bits
control interrupts associated with the timer status register flags ICF,
OCF, and TOF.
INPUT CAPTURE REGISTER HIGH
$0014
INPUT CAPTURE REGISTER LOW
$0015
TIMER REGISTER HIGH
TCMP
EDGE
SELECT/DETECT
LOGIC
TIMER
INTERRUPT
REQUEST
TIMER REGISTER LOW
15
0
15
8 7
0
TIMER STATUS REGISTER
$0013
TIMER CONTROL REGISTER
$0012
I
O
T
I
O
T
8 7
$0018
$0019
I
LATCH
Address:
$12
Bit 7
6
5
4
3
2
1
Bit 0
Read:
ICIE
OCIE
TOIE
0
0
0
IEDG
OLVL
Write:
Reset:
0
0
0
0
0
0
U
0
U = Unaffected
Figure 8-4. Timer Control Register (TCR)
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