User’s Manual
6-11
05.99
On-Chip Peripheral Components
C513AO
Ports 1 and 3 provide several alternate functions as listed in Table 6-1.
Table 6-1
Alternate Functions of Ports 1 and 3
Port
Symbol
Function
P1.0
T2
Input to Counter 2
P1.1
T2EX
Capture-reload trigger of Timer 2/up-down count
P1.2
SCLK
SSC master Clock output, slave clock input
P1.3
SRI
SSC serial data in
P1.4
STO
SSC serial data out
P1.5
SLS
SSC slave select
P3.0
RXD
Serial port’s receiver data input (asynchronous) or data input/output
P3.1
TXD
Serial port’s transmitter data output (asynchronous) or data clock input
P3.2
INT0
External Interrupt 0 input, Timer 0 gate control
P3.3
INT1
External Interrupt 1 input, Timer 1 gate control
P3.4
T0
Timer 0 external counter input
P3.5
T1
Timer 1 external counter Input
P3.6
WR
External data memory Write strobe
P3.7
RD
External data memory Read strobe
