参数资料
型号: MC68HC05V7FN
厂商: MOTOROLA INC
元件分类: 微控制器/微处理器
英文描述: 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PQCC68
封装: PLASTIC, LCC-68
文件页数: 156/170页
文件大小: 589K
代理商: MC68HC05V7FN
MOTOROLA
SECTION 11: 16-BIT TIMER
Page 72
MC68HC05V7 Specification Rev. 1.0
11.4
TIMER CONTROL REGISTER (TCR) - $12
The TCR is a read/write register containing six control bits. Three bits control interrupts
associated with the timer status register flags ICF, OCF and TOF.
Figure 11-2:
Timer Control Register - $12
11.4.1
ICIE - Input Capture Interrupt Enable
1 - Interrupt enabled
0 - Interrupt disabled
11.4.2
OCIE - Output Compare Interrupt Enable
1 - Interrupt enabled
0 - Interrupt disabled
11.4.3
TOIE - Timer Overflow Interrupt Enable
1 - Interrupt enabled
0 - Interrupt disabled
11.4.4
TON - Timer On
When disabled, the timer is initialized to the reset condition.
1 - Timer enabled
0 - Timer disabled
11.4.5
IEDG - Input Edge
Value of input edge determines which level transition on TCAP pin will trigger free-
running counter transfer to the input capture register. Reset clears this bit.
1 - Positive edge
0 - Negative edge
11.4.6
OLVL - Output Level
Value of output level is clocked into output level register by the next successful
output compare and will appear on the TCMP pin.
1 - High output
0 - Low output
11.5
TIMER STATUS REGISTER (TSR) - $13
The TSR is a read-only register containing three status flag bits.
Figure 11-3:
Timer Status Register - $13
ICIE
OCIE
TOIE
0
TON
IEDG
OLVL
RESET
$12
00
0
00
ICF
OCF
TOF
00000
RESET
$13
00
0
00
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