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Ports 1 and 3 are provided for several alternate functions, as listed in table 6-1:
Table 6-1
Alternate Functions of Port 1 and 3
Port
Pin
P1.0
T2
P1.1
T2EX
P1.2
SCLK
P1.3
SRI
P1.4
STO
P1.5
SLS
P3.1
DADD
P3.2
INT0
P3.3
INT1
P3.4
T0
P3.5
T1
P3.6
WR
P3.7
RD
Semiconductor Group
Alternate Function
Input to counter 2
Capture-reload trigger of timer 2 / up down count
SSC master clock output, slave clock input
SSC serial data input
SSC serial data output
SSC slave select input
Device attached input of the USB module
External interrupt 0 input, timer 0 gate control
External interrupt 1 input, timer 1 gate control
Timer 0 external counter input
Timer 1 external counter input
External data memory write strobe
External data momory read strobe
On-Chip Peripheral Components
6-11
C541U
1999-04-01
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