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Signal
3
PCSA5
ALT1
DSPI_B_PCS[3]
GPIO
GPIO[101]
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.
3
This signal name is used to support legacy naming.
16.6.15.68 Pad Configuration Register 102 (SIU_PCR102)
SIU_BASE+0x10C
0
1
R
0
0
W
Reset
0
0
= Unimplemented or Reserved
1
When configured as DSPI_B_SCK, the OBE bit should be set to one for master operation, and set to zero for slave
operation. When configured as GPO, the OBE bit should be set to one.
2
When configured as DSPI_B_SCK in slave operation the IBE bit should be set to one. When configured as
DSPI_B_SCK in master operation 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.
Signal
Primary
DSPI_B_SCK
ALT1
DSPI_C_PCS[1]
GPIO
GPIO[102]
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.
Freescale Semiconductor
Table 16-92. SIU_PCR101 PA values
Name
Module
DSPI
SIU
2
3
4
5
6
0
0
PA
OBE
0
0
0
0
0
Figure 16-90. Pad Configuration Register (SIU_PCR102)
Table 16-93. SIU_PCR102 PA values
Name
Module
DSPI
DSPI
SIU
MPC5644A Microcontroller Reference Manual, Rev. 6
Description
Chip select
O
GPIO
I/O
7
8
9
10
1
2
IBE
0
0
ODE
0
0
0
0
Description
Clock
I/O
Chip select
O
GPIO
I/O
System Integration Unit (SIU)
1,2
I/O
PA value
0b10
0b00
11
12
13
14
15
HYS
SRC
WPE
WPS
0
0
0
1
1
1,2
I/O
PA value
0b01
0b10
0b00
453
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