參數(shù)資料
型號: Q67120-C508
英文描述: IC-SM-8-BIT CPU 12-MHZ
中文描述: 集成電路釤8位CPU的12兆赫
文件頁數(shù): 58/121頁
文件大?。?/td> 1000K
代理商: Q67120-C508
Semiconductor Group
6-24
On-Chip Peripheral Components
C501
Special Function Register T2CON (Address C8H)
Reset Value : 00H
Bit
Function
TF2
Timer 2 Overflow Flag.
Set by a timer 2 overflow. Must be cleared by software. TF2 will not be set when
either RCLK = 1 or TCLK = 1.
EXF2
Timer 2 External Flag.
Set when either a capture or reload is caused by a negative transition on T2EX
and EXEN2 = 1. When timer 2 interrupt is enabled, EXF2 = 1 will cause the CPU
to vector to the timer 2 interrupt routine. EXF2 must be cleared by software. EXF2
does not cause an interrupt in up/down counter mode (DCEN = 1, SFR T2MOD)
RCLK
Receive Clock Enable.
When set, causes the serial port to use timer 2 overflow pulses for its receive
clock in serial port modes 1 and 3. RCLK = 0 causes timer 1 overflows to be used
for the receive clock.
TCLK
Transmit Clock Enable.
When set, causes the serial port to use timer 2 overflow pulses for its transmit
clock in serial port modes 1 and 3. TCLK = 0 causes timer 1 overflow to be used
for the transmit clock.
EXEN2
Timer 2 External Enable.
When set, allows a capture or reload to occur as a result of a negative transition
on pin T2EX (P1.1) if timer 2 is not being used to clock the serial port. EXEN2 = 0
causes timer 2 to ignore events at T2EX.
TR2
Start / Stop Control for Timer 2.
TR2 = 1 starts timer 2.
C/T2
Timer or Counter Select for Timer 2.
C/T2 = 0 for timer function. C/T2 = 1 for external event counter (falling edge
triggered).
CP/RL2
Capture /Reload Select.
CP/RL2 = 1 causes captures to occur an negative transitions at pin T2EX if
EXEN2 = 1. CP/RL2 = 0 causes automatic reloads to occur when timer 2
overflows or negative transitions occur at pin T2EX when EXEN2 = 1. When
either RCLK = 1 or TCLK = 1, this bit is ignored and the timer is forced to auto-
reload on timer 2 overflow.
TF2
EXF2
RCLK
TCLK
C8H
T2CON
EXEN2
TR2
C/T2
CP/RL2
Bit No.
CF
H
MSB
LSB
C8
H
CE
H
CD
H
CC
H
CB
H
CA
H
C9
H
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