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参数资料
| 型号： | T83C5101ZZZ-3ZSIL |
| 厂商： | ATMEL CORP |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 8-BIT, MROM, 40 MHz, MICROCONTROLLER, PDIP24 |
| 封装： | DIP-24 |
| 文件页数： | 10/52页 |
| 文件大小： | 701K |
| 代理商： | T83C5101ZZZ-3ZSIL |
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18
Rev. F - 12 March, 2001
T87C5101
T83C5101/02
Table 5. T2CON Register
T2CON - Timer 2 Control Register (C8h)
Reset Value = 0000 0000b
Bit addressable
7
6
5
4
3
2
1
0
TF2
EXF2
RCLK
TCLK
EXEN2
TR2
C/T2#
CP/RL2#
Bit Number
Bit
Mnemonic
Description
7
TF2
Timer 2 overow Flag
Must be cleared by software.
Set by hardware on timer 2 overow, if RCLK = 0 and TCLK = 0.
6
EXF2
Timer 2 External Flag
Set when a capture or a reload is caused by a negative transition on T2EX pin if EXEN2=1.
When set, causes the CPU to vector to timer 2 interrupt routine when timer 2 interrupt is enabled.
Must be cleared by software. EXF2 doesn’t cause an interrupt in Up/down counter mode (DCEN = 1)
5
RCLK
Receive Clock bit
Clear to use timer 1 overow as receive clock for serial port in mode 1 or 3.
Set to use timer 2 overow as receive clock for serial port in mode 1 or 3.
4
TCLK
Transmit Clock bit
Clear to use timer 1 overow as transmit clock for serial port in mode 1 or 3.
Set to use timer 2 overow as transmit clock for serial port in mode 1 or 3.
3
EXEN2
Timer 2 External Enable bit
Clear to ignore events on T2EX pin for timer 2 operation.
Set to cause a capture or reload when a negative transition on T2EX pin is detected, if timer 2 is not used to
clock the serial port.
2
TR2
Timer 2 Run control bit
Clear to turn off timer 2.
Set to turn on timer 2.
1
C/T2#
Timer/Counter 2 select bit
Clear for timer operation (input from internal clock system: FOSC).
Set for counter operation (input from T2 input pin, falling edge trigger). Must be 0 for clock out mode.
0
CP/RL2#
Timer 2 Capture/Reload bit
If RCLK=1 or TCLK=1, CP/RL2# is ignored and timer is forced to auto-reload on timer 2 overow.
Clear to auto-reload on timer 2 overows or negative transitions on T2EX pin if EXEN2=1.
Set to capture on negative transitions on T2EX pin if EXEN2=1.
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