W78E054D Datasheet, PDF (53/89 Pages) List of Unclassifed Manufacturers – 8-bit microcontroller

W78E054D/W78E052D Data Sheet
Down Counting Reload Value
0FFh
0FFh
Fosc
1/12
T2=P1.0
TR2=T2CON.2
C/T2=T2CON.1
0
1
TL2 TH2
T2CON.7
TF2
Timer2
Interrupt
T2EX=P1.1
RCAP2L RCAP2H
Up Counting Reload Value
EXF2
T2CON.6
Figure 14–6 16-Bit Auto-reload Mode, Counting Up
14.3.4 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 0FFFFh. 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.
RCLK+TCLK=1, CP/RL2 =0
Timer1
Overflow
Fosc
1/2
T2=P1.0
TR2=T2CON.2
T2EX=P1.1
EXEN2=T2CON.3
C/T2=T2CON.1
0
1
1/2
TL2
RCAP2L
0
TH2
Timer2
Overflow
RCLK=
T2CON.5
1
0
TCLK=
T2CON.4
1
0
RCAP2H
1
SMOD=
PCON.7
1/16
1/16
Rx Clock
Tx Clock
EXF2
T2CON.6
Timer2
Interrupt
Figure 14–7 Baud Rate Generator Mode
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Publication Release Date: Jun 9, 2015
Revision A13