Table 1-3. Pin Functions (3)
Type
Serial com- ATxD
munication
interface
Symbol
I/O Name and function
O
Asynchronous Transmit Data:
Asynchronous data output
pin for the serial communication interface.
I
Asynchronous Receive Data:
Asynchronous data input pin for
the serial communication interface.
I/O
Asynchronous Serial ClocK:
Input/output pin for the
asynchronous serial clock.
O
Clock-synchronized Transmit Data:
Synchronous data output
pin for the serial communication interface.
I
Clock-synchronized Receive Data:
Synchronous data input pin
for the serial communication interface.
I/O
Clock-synchronized Serial ClocK:
Input/output pin for the
synchronous serial clock.
O
FRT Output compare A and B:
Output pins controlled by
comparators A and B of the free-running timer.
ARxD
ASCK
CTxD
CRxD
CSCK
16-Bit free- FTOA,
running
timer
FTOB
FTCI
I
FRT counter Clock Input:
Input pin for an external clock
signal for the free-running timer.
FRT Input capture A to D:
Input capture pins for the
free-running timer.
8-bit TiMer Output:
Compare-match output pins for the
8-bit timers.
8-bit TiMer counter Clock Input:
External clock input pins
for the 8-bit timer counters.
8-bit TiMer counter Reset Input:
A High input at these
pins resets the 8-bit timer counters.
PWM timer output (channels 0 and 1):
Pulse-width
modulation timer output pins.
ANalog input:
Analog signal input pins.
A/D Trigger:
External trigger input for starting the A/D
converter.
Analog reference Voltage:
Reference voltage pin for the A/D
converter.
Analog ground:
Ground pin for the A/D converter.
FTIA to
FTID
TMO
0
,
TMO
1
TMCI
0
,
TMCI
1
TMRI
0
,
TMRI
1
PW
0
,
PW
1
AN
7
to AN
0
I
ADTRG
I
8-Bit
timer
O
I
I
PWM
timer
A/D
converter
O
I
AV
CC
I
AV
SS
I
14