System Integration Unit (SIU)
MPC5644A Microcontroller Reference Manual, Rev. 6
Freescale Semiconductor
409
16.6.15.9 Pad Configuration Register 12 (SIU_PCR12)
Figure 16-24. Pad Configuration Register (SIU_PCR12)
Table 16-26. SIU_PCR11 PA values
Signal
Name
Module
Description
I/O
1,2
1
In cases where an I/O function can be either an input or an output, I/O direction is specified using
the IBE and OBE bits. Set IBE = 1 for input or OBE = 1 for output.
2
For I/O functions that change direction dynamically, such as the external data bus, switching
between input and output is handled internally and the IBE and OBE bits are ignored.
PA value
Primary
ADDR[15]
EBI
Address bus
I/O
0b1
GPIO
GPIO[11]
SIU
GPIO
I/O
0b0
S0x58
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
R
0
0
0
PA
OBE
1
1
When configured as ADDR[16] or DATA[16] the OBE bit has no effect. When configured as GPO, the OBE bit
should be set to one.
IBE
2
2
When configured as DATA[16], FR_A_TX or GPO, the IBE bit may be set to one to reflect the pin state in the
corresponding GPDI register. Setting the IBE bit to zero reduces power consumption. When configured as GPI, the
IBE bit should be set to one.
0
0
ODE
3
3
When configured as ADDR[16], the ODE bit should be set to zero.
HYS
SRC
WPE
4
4
See the EBI section for weak pull up settings when configured as ADDR[16]
W
Reset
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
= Unimplemented or Reserved
Table 16-27. SIU_PCR12 PA values
Signal
Name
Module
Description
I/O
1,2
1
In cases where an I/O function can be either an input or an output, I/O direction is specified using the IBE and OBE
bits. Set IBE = 1 for input or OBE = 1 for output.
2
For I/O functions that change direction dynamically, such as the external data bus, switching between input and
output is handled internally and the IBE and OBE bits are ignored.
PA value
Primary
ADDR[16]
EBI
Address bus
I/O
0b001
ALT1
FR_A_TX
EBI
FlexRay transmit
O
0b010
ALT2
DATA[16]
EBI
Data bus
I/O
0b100
GPIO
GPIO[12]
SIU
GPIO
I/O
0b000
Summary of Contents for MPC5644A
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