SC01/SC02/SC11/SC12
Sc12hw09.doc page 12 of 37 24.11.1999 V0.9
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5. FUNCTIONS THAT ARE MUTUAL EXCLUSIVE
The IPC@CHIP family microcontroller provides a lot of different functions by several
multi-function pins. Choosing one function will result in disabling other functions. The
following table shows, which functions are mutual exclusive.
Pin Name Function Exclusion
A0 nonmultiplexed
address A0
PIO4, PCS1#, TMRIN0
A[1..2] nonmultiplexed
address A[1..2]
PIO[2..3], PCS[5..6], Timer 1
ALE Address / Data bus PCS0#
CTS0 /
ENRX0#
hardware flow
control Serial Port 0
PIO9
CTS1 hardware flow
control Serial Port 1
PIO6, PCS2#, INT2, INTA#, PWD, SPI
DRQ0 DMA Request 0 PIO1, INT5, I
2
C-Bus, SPI
DRQ1 DMA Request 1 PIO0, INT6, I
2
C-Bus, SPI
I
2
CCLK,
I
2
CDAT
I
2
C-Bus PIO[0..1], DMA, INT[5..6], SPI
INT0 Interrupt Request 0 PIO13, TMROUT0, cascaded Interrupt
Controller
INT0 cascaded Interrupt
Controller
PIO6, PIO13, INT2, PCS2#, PWD, SPI,
TMROUT0, hw flow control Serial Port 1
INT2 Interrupt Request 2 PIO6, PCS2#, INTA#, PWD, SPI, hardware
flow control Serial Port 1
INT3 Interrupt Request 3 PIO12, Serial Port 1
INT4 Interrupt Request 4 PIO5, PCS3#, SPI, hardware flow control
Serial Port 1
INT5 Interrupt Request 5 PIO1, DRQ0, I
2
C-Bus, SPI
INT6 Interrupt Request 6 PIO0, DRQ1, I
2
C-Bus, SPI
INTA# cascaded Interrupt
Controller
PIO6, PIO13, INT0, INT2, PCS2#, PWD,
TMROUT0, SPI, hw flow control Serial Port 1
PCS0# programmable chip
select 0
Address/Data bus
PCS1# programmable chip
select 1
A0, PIO4, TMRIN0, SPI
PCS2# programmable chip
select 2
PIO6, INT2, INTA#, PWD, SPI, hw flow
control Serial Port 1, cascaded Interrupt
Controller
PCS3# programmable chip
select 3
PIO5, INT4, SPI, hardware flow control
Serial Port 1
PCS5# programmable chip
select 5
A[1..2], PIO3, Timer 1
PCS6# programmable chip
select 6
A[1..2], PIO2
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