参数资料
型号: MC68HC705JB2DW
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: 8-BIT, OTPROM, 3 MHz, MICROCONTROLLER, PDSO20
封装: SOIC-20
文件页数: 92/128页
文件大小: 2493K
代理商: MC68HC705JB2DW
GENERAL RELEASE SPECIFICATION
August 28, 1998
PROGRAMMABLE TIMER
MC68HC705JB2
9-8
REV 1.1
1.
Disable interrupts by setting the I bit in the condition code register.
2.
Write to the OCRH. Compares are now inhibited until OCRL is written.
3.
Read the TSR to arm the OCF for clearing.
4.
Enable the output compare registers by writing to the OCRL. This also
clears the OCF ag bit in the TSR.
5.
Enable interrupts by clearing the I bit in the condition code register.
A software example of this procedure is shown below.
9.5
TIMER CONTROL REGISTER (TCR)
The timer control register is shown in Figure 9-10 performs the following
functions:
Enables input capture interrupts
Enables output compare interrupts
Enables timer overow interrupts
Control the active edge polarity of the TCAP signal on pin PB0/TCAP
Reset clears all the bits in the TCR with the exception of the IEDG bit which is
unaffected.
ICIE - INPUT CAPTURE INTERRUPT ENABLE
This read/write bit enables interrupts caused by an active signal on the PB0/
TCAP pin. Reset clears the ICIE bit.
1 =
Input capture interrupts enabled.
0 =
Input capture interrupts disabled.
9B
...
B7
B6
BF
...
9A
16
13
17
SEI
...
STA
LDA
STX
...
CLI
OCRH
TSR
OCRL
DISABLE INTERRUPTS
.....
INHIBIT OUTPUT COMPARE
ARM OCF FLAG FOR CLEARING
READY FOR NEXT COMPARE, OCF CLEARED
.....
ENABLE INTERRUPTS
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
TCR
R
ICIE
OCIE
TOIE
000
IEDG
0
$0012
W
reset:
000000
Unaffected
0
Figure 9-10. Timer Control Register (TCR)
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For More Information On This Product,
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相关PDF资料
PDF描述
MC68HC705JB2P 8-BIT, OTPROM, 3 MHz, MICROCONTROLLER, PDIP20
MC68HC705JB4P 8-BIT, OTPROM, 3 MHz, MICROCONTROLLER, PDIP28
MC68HC705K1CDW 8-BIT, OTPROM, 2 MHz, MICROCONTROLLER, PDSO16
MC68HC705K1CP 8-BIT, OTPROM, 2 MHz, MICROCONTROLLER, PDIP16
MC68HC705K1S 8-BIT, OTPROM, 2 MHz, MICROCONTROLLER, CDIP16
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