W79E632A Datasheet, PDF (44/79 Pages) Winbond – 8-BIT MICROCONTROLLER

W79E632A/W79L632A
Baud Rate Generator Mode
The baud rate generator mode is enabled by setting either the RCLK or TCLK bits in T2CON register.
While in the baud rate generator mode, Timer/Counter 2 is a 16 bit counter with auto reload when the
count rolls over from FFFFh. However, rolling over does not set the TF2 bit. If EXEN2 bit is set, then a
negative transition of the T2EX pin will set EXF2 bit in the T2CON register and cause an interrupt
request.
Fosc
1/2
T2=P1.0
TR2=T2CON.2
T2EX=P1.1
EXEN2=T2CON.3
C/T2=T2CON.1
0
1
Timer1
Overflow
1/2
TL2
RCAP2L
TH2
Timer2
Overflow
0
RCLK=
T2CON.5
1 _SMOD=
PCON.7
1
0
TCLK=
T2CON.4
1/16
RCAP2H
1
0
1/16
Rx Clock
Tx Clock
EXF2
T2CON.6
Timer2
Interrupt
Figure 17. Baud Rate Generator Mode
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