参数资料
型号: MC68HC705F8B
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: 8-BIT, OTPROM, 1.8 MHz, MICROCONTROLLER, PDIP56
封装: PLASTIC, SDIP-56
文件页数: 77/126页
文件大小: 1084K
代理商: MC68HC705F8B
MOTOROLA
6-6
MC68HC05F8
TIMERS
6
TOIE - Timer Overow Interrupt Enable
1 (set)
Timer Overow interrupt enabled.
0 (clear) –
Timer Overow interrupt disabled.
IEDG - Input Edge
1 (set)
TCAP is positive-going edge sensitive.
0 (clear) –
TCAP is negative-going edge sensitive.
When IEDG is set, a positive-going edge on the TCAP pin will trigger a transfer of the free-running
counter value to the input capture registers. When clear, a negative-going edge triggers the
transfer.
OLVL - Output Level Voltage Latch
1 (set)
High output on TCMP pin if counter compare is true.
0 (clear) –
Low output on TCMP pin if counter compare is true.
There is a bit in the Event Enable register which may be used to disable and enable the
programmable timer.
TIMHA - Timer A Enable/Disable
1 (set)
Timer inhibit
0 (clear) –
Enable timer (default at reset)
6.1.5
Timer A Status Register (TSR)
The Timer Status register ($19) contains the status bits for the above three interrupt conditions -
ICF, OCF, TOF.
Accessing the timer status register satises the rst condition required to clear the status bits. The
remaining step is to access the register corresponding to the status bit.
Address
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
State
on reset
Event Enable Register
$16
TIMHA INTE1 INTE2
0
0000 0000
Address
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
State
on Reset
$19
ICF
OCF
TOF
0
uuu0 0000
TPG
52
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For More Information On This Product,
Go to: www.freescale.com
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For More Information On This Product,
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