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| 型号： | USB-EA-CONVZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 51/68页 |
| 文件大小： | 0K |
| 描述： | SUPPORT BOARD ADUC8XX |
| 标准包装： | 1 |
| 类型： | 仿真器 |
| 适用于相关产品： | ADuC8xx |
| 所含物品： | 模块 |
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REV. B
ADuC824
–55–
T2CON
Timer/Counter 2 Control Register
SFR Address
C8H
Power-On Default Value
00H
Bit Addressable
Yes
2
F
T2
F
X
EK
L
C
RK
L
C
T2
N
E
X
E2
R
T2
T
N
C2
P
A
C
Table XXV. T2CON SFR Bit Designations
Bit
Name
Description
7
TF2
Timer 2 Overflow Flag
Set by hardware on a Timer 2 overflow. TF2 will not be set when either RCLK or TCLK = 1.
Cleared by user software.
6
EXF2
Timer 2 External Flag
Set by hardware when either a capture or reload is caused by a negative transition on T2EX and
EXEN2 = 1.
Cleared by user user software.
5
RCLK
Receive Clock Enable Bit
Set by user to enable the serial port to use Timer 2 overflow pulses for its receive clock in serial
port Modes 1 and 3.
Cleared by user to enable Timer 1 overflow to be used for the receive clock.
4
TCLK
Transmit Clock Enable Bit
Set by user to enable the serial port to use Timer 2 overflow pulses for its transmit clock in serial
port Modes 1 and 3.
Cleared by user to enable Timer 1 overflow to be used for the transmit clock.
3
EXEN2
Timer 2 External Enable Flag
Set by user to enable a capture or reload to occur as a result of a negative transition on T2EX if
Timer 2 is not being used to clock the serial port.
Cleared by user for Timer 2 to ignore events at T2EX.
2
TR2
Timer 2 Start/Stop Control Bit
Set by user to start Timer 2.
Cleared by user to stop Timer 2.
1
CNT2
Timer 2 Timer or Counter Function Select Bit
Set by user to select counter function (input from external T2 pin).
Cleared by user to select timer function (input from on-chip core clock).
0
CAP2
Timer 2 Capture/Reload Select Bit
Set by user to enable captures on negative transitions at T2EX if EXEN2 = 1.
Cleared by user to enable auto-reloads with Timer 2 overflows or negative transitions at T2EX
when EXEN2 = 1. When either RCLK = 1 or TCLK = 1, this bit is ignored and the timer is
forced to autoreload on Timer 2 overflow.
Timer/Counter 2 Data Registers
Timer/Counter 2 also has two pairs of 8-bit data registers associated with it. These are used as both timer data registers and timer
capture/reload registers.
TH2 and TL2
Timer 2, data high byte and low byte.
SFR Address = CDhex, CChex respectively.
RCAP2H and RCAP2L
Timer 2, Capture/Reload byte and low byte.
SFR Address = CBhex, CAhex respectively.
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