Programming Model - Motorola DragonBall MC9328MX1 Reference Manual

Table 32-3. GPIO Multiplexing Table with AIN, BIN, CIN, AOUT, and BOUT (Continued)
Primary
Alternate Signal
Signal
A19 ETMPIPESTAT[
3]
A20 ETMPIPESTAT[
0]
A21 ETMPIPESTAT[
1]
A22 ETMPIPESTAT[
2]
A23 ETMTRACECLK
A24 ETMTRACESYN
C
DTACK ETMTRACEPKT
[4]
TIN –
TOUT2 –
SPL_SPR UART2_DSR
PS UART2_RI
CLS UART2_DCD
REV UART2_DTR
SPI_RDY –

32.5 Programming Model

There are four sets of control registers corresponding to the four GPIO ports. Each port has 17 registers
associated with it, located at sequential addresses in the memory map. Table 32-4 summarizes these
registers and their addresses.
The starting address of each register set is known as the base address and is referred to by the term $BA.
The base addresses for the four GPIO ports are as follows:
• GPIO Port A $BA = 0x0021C000
• GPIO Port B $BA = 0x0021C100
• GPIO Port C $BA = 0x0021C200
• GPIO Port D $BA = 0x0021C300
MOTOROLA
GPIO
AIN[i]
Mux
– –
– –
– –
– –
– –
PA0 SPI2_CL
K
PA17 SPI2_SS
PA1 –
PD31 –
PD10 SPI2_TX
D
PD9 –
PD8 SPI2_SS
PD7 SPI2_CL
K
PC13 –
GPIO Module and I/O Multiplexer (IOMUX)
CIN[
BIN[i] AOUT[i]
i]
– – –
– – –
– – –
– – –
– – –
– – –
A25 – –
– –– SPI2_RXD
SPI2_TX – –
D
– – –
– – SPI2_RXD
– – –
– – –
– – DMA_DRE
Q
Programming Model
BOUT[ Defau
i] lt
– A19
– A20
– A21
– A22
– A23
– A24
– PA17
– PA1
– PD31
– PD10
– PD9
– PD8
– PD7
– PC13
32-7