参数资料
型号: MC68HC705T16B
厂商: MOTOROLA INC
元件分类: 微控制器/微处理器
英文描述: 8-BIT, OTPROM, 2.1 MHz, MICROCONTROLLER, PDIP56
封装: PLASTIC, SDIP-56
文件页数: 73/128页
文件大小: 734K
代理商: MC68HC705T16B
MC68HC05T16
MOTOROLA
5-7
TIMERS
5
TOF - Timer Overow Flag
1 (set)
Timer Overow has occurred.
0 (clear) –
No timer overow has occurred.
This bit is set when the free-running counter overows from $FFFF to $0000; a timer overow
interrupt will occur, if TOIE (bit 5 in Timer Control register $10) is set. TOF is cleared by reading
the TSR and the counter low register ($19).
When using the timer overow function and reading the free-running counter at random times to
measure an elapsed time, a problem may occur whereby the timer overow ag is unintentionally
cleared if:
1) the timer status register is read or written when the TOF is set, and
2) the LSB of the free-running counter is read, but not for the purpose of
servicing the ag.
Reading the alternate counter register instead of the counter register will avoid this potential
problem.
TCAPS - Timer Capture State
1 (set)
TCAP pin is a logic high.
0 (clear) –
TCAP pin is a logic low.
This bit reects the logic level at the TCAP pin.
5.1.6
Programmable Timer Timing Diagrams
The relationships between the internal clock signals, the counter contents and the status of the
ag bits are shown in the following diagrams. It should be noted that the signals labelled ‘internal’
(processor clock, timer clocks and Reset) are not available to the user.
TPG
47
相关PDF资料
PDF描述
MC68HC05T16B 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDIP56
MC68HC705V8CFU 8-BIT, OTPROM, 2.1 MHz, MICROCONTROLLER, PQFP64
MC68HC705V8B 8-BIT, OTPROM, 2.1 MHz, MICROCONTROLLER, PDIP56
MC68HC705V8FN 8-BIT, OTPROM, 2.1 MHz, MICROCONTROLLER, PQCC68
MC68HC705V8CFN 8-BIT, OTPROM, 2.1 MHz, MICROCONTROLLER, PQCC68
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