Siemens SAB 80515 Series User Manual page 42

7.1.3 Alternate Functions
Several pins of ports 1 and 3 are multifunctional. They are port pins and also serve to implement
special features as listed in table 7-1.
Table 7-1
Port Pin
P1.0 INT3/CC0
P1.1 INT4/CC1
P1.2 INT5/CC2
P1.3 INT6/CC3
P1.4 INT2
P1.5 T2EX
P1.6 CLKOUT
P1.7 T2
P3.0 RXD
P3.1 TXD
P3.2 INT0
P3.3 INT1
P3.4 T0
P3.5 T1
P3.6
WR
P3.7 RD
Semiconductor Group
Alternate Function
Ext. interrupt 3 input, compare 0 output, capture 0 input
Ext. interrupt 4 input, compare 1 output, capture 1 input
Ext. interrupt 5 input, compare 2 output, capture 2 input
Ext. interrupt 6 input, compare 3 output, capture 3 input
Ext. interrupt 2 input
Timer 2 external reload trigger input
System clock output
Timer 2 external reload trigger input
Serial port's receiver data input (asynchronous) or data
input/output (synchronous)
Serial port's transmitter data output (asynchronous) or
clock output (synchronous)
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 memory read strobe
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On-Chip Peripheral Components