W78ERD2_07 Datasheet, PDF (37/76 Pages) Winbond – 8-BIT MICROCONTROLLER

W78ERD2/W78ERD2A
RCLK+TCLK=0, CP/RL2 =T2CON.0=0, DCEN=1
Down Counting Reload Value
0FFh 0FFh
1/6
osc
1/12
T2 = P1.0
TR2 = T2CON.2
T2M = CKCON.5
1
C/T = T2CON.1
0⁰
1
TL2 TH2
T2EX = P1.1
RCAP2L RCAP2H
Up Counting Reload Value
Figure 9-6 16-Bit Auto-reload Up/Down Counter
T2CON.7
TF2
Timer 2
Interrupt
EXF2
T2CON.6
Baud Rate Generator Mode
Baud-rate generator mode is enabled by setting either the RCLK or TCLK bits in T2CON register. In
baud-rate generator mode, Timer 2 is a 16-bit up-counter that automatically reloads when it overflows,
but this overflow does not set the timer overflow bit TF2. If EXEN2 is set, then a negative transition on
the T2EX pin sets EXF2 bit in T2CON and, if enabled, generates an interrupt request.
RCLK+TCLK=1
osc
T2 = P1.0
TR2 = T2CON.2
C/T = T2CON.1
0
1
TL2 TH2
Timer 2
overflow
T2EX = P1.1
EXEN2 = T2CON.3
RCAP2LRCAP2H
EXF2 ^{Timer 2}
Interrupt
T2CON.6
Figure 9-7 Baud Rate Generator Mode
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Publication Release Date: February 14, 2007
Revision A10