Megawin Technology Co., Ltd.
MG87FE/L52
There are two extra SFR designed to configure timer T2. They are T2MOD, and T2CON.
T2MOD
Name
Bit7
-
Bit6
-
Bit5
-
Bit4
-
Bit3
-
Bit2
-
Bit1
Bit0
T2MOD
T2OE
DCEN
T2OE
DCEN
Timer-2 output enable bit. It enables Timer2 overflow rate to toggle P1.0
Down Count Enable bit. When set, this will allow Timer2 to be configured as a
down counter.
T2CON
Name
Bit7
TF2
Bit6
Bit5
Bit4
Bit3
Bit2
TR2
Bit1
Bit0
T2CON
EXF2
RCLK
TCLK
EXEN2
C//T2
CP/RL2
Timer2 overflow flag. It will be set by Timer2 overflow and must be cleared by
software. TF2 will not be set when either TCLK or RCLK =1.
Timer2 external flag. It will be set when either a capture or reload is caused by a
negative transition on pin T2EX and EXEN2=1. When Timer2 interrupt is enabled,
EXF2=1 will cause the CPU vector to the Timer2 interrupt routine. EXF2 must be
cleared by software. EXF2 does not cause an interrupt in Auto-Reload Up-Down
mode (ARUD).
TF2
EXF2
When this bit was set and will cause the serial port to use Timer2 overflow pulse
for its receive-clock in mode-1 and mode-3. RCLK=0 will cause Timer1 overflow
pulse to be used.
RCLK
TCLK
When this bit was set and will cause the serial port to use Timer2 overflow pulse
for its transmit-clock in mode-1 and mode-3. TCLK=0 will cause Timer1 overflow
pulse to be used.
Timer-2 external enable flag. When set, allows a capture or reload to be occurred.
As a result of a negative transition on T2EX, if Timer2 is not used to clock the
serial port. EXEN2=0 will cause Timer2 to ignore events at T2EX.
Start/Stop control bit for Timer2.
EXEN2
TR2
C//T2
=0, will set as Timer function; =1, will set as external event counter.
Capture/Reload flag. When set, captures will occurs on a negative transition at
T2EX if EXEN2=1. When cleared, auto-reload function will occur either with
Timer2 overflows or a negative transition at T2EX when EXEN2=1. When whether
TCLK or RCLK is 1, this bit is ignored and the timer is forced to auto-reload on
Timer2 overflow.
CP/RL2
17
Preliminary ver 1.3
Date: 2009-JAN-20
MEGAWIN [ MEGAWIN TECHNOLOGY CO., LTD ]
