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C165UTAH
Interrupt and Trap Functions
Data Sheet
126
2001-02-23
7.8.2
External Interrupt Source Control
Fast external interrupts may also have interrupt sources selected from other peripherals.
This function is very advantageous in Slow Down mode or in Sleep mode, if for example
the SSC interface shall be used to wake-up the system. The register EXISEL is used to
switch the receive inputs of the serial interfaces to the fast external interrupts, in order to
detect incomming messages in case of disabled serial interface modules.
The EXISEL register is defined as follows:
EXISEL (F1DA
H
/ ED
H
)
15
14
ESFR-bReset Value: 0000
H
9
8
Bit
Function
EXI0SS
0 0: Input from default pin. Must be set to ’00’.
0 1: Not allowed.
1 0: Not allowed.
1 1: Not allowed.
EXI1SS
0 0: Input from default pin.Must be set to ’00’.
0 1: Not allowed.
1 0: Not allowed.
1 1: Not allowed.
EXI2SS
0 0: Input from default pin.
0 1: Input from alternate source ASC_RxD @ P3.11.
1 0: Input from default pin ORed with alternate source ASC_RxD @ P3.11.
1 1: Input from default pin ANDed with alternate source ASC_RxD @ P3.11.
EXI3SS
0 0: Input from default pin.
0 1: Input from alternate source SSC_RxD @ P3.9.
1 0: Input from default pin ORed with alternate source SSC_RxD @ P3.9.
1 1: Input from default pin ANDed with alternate source SSC_RxD @ P3.9.
EXI4SS
0 0: Input from default pin.
0 1: Input from alternate source SSC_SCLK @ P3.13.
1 0: Input from default pin ORed with alternate source SSC_SCLK @ P3.13.
1 1: Input from default pin ANDed with alternate source SSC_SCLK @ P3.13.
EXI5SS
0 0: Input from default pin.
0 1: Input from alternate source USB_suspend interrupt.
1 0: Input from default pin ORed with alternate source USB_suspend interrupt.
1 1: Input from default pin ANDed with alternate source USB_suspend interrupt.
5
4
3
2
1
0
11
10
7
6
13
12
rw
rw
rw
EXI2SS
00
00
rw
rw
rw
01
EXI5SS
EXI6SS
rw
rw
EXI3SS
EXI4SS