NXP Semiconductors MPC5644A Reference Manual page 466

System Integration Unit (SIU)
Signal
Primary ETPU_A[8]
ALT1 ETPU_A[20]
ALT2 DSPI_B_SOUT_LVDS+
GPIO GPIO[122]
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.
16.6.15.78.10Pad Configuration Register 123 (SIU_PCR123)
SIU_BASE+0x136
0 1
R
0 0
W
Reset
0 0
= Unimplemented or Reserved
1
The OBE bit must be set to one for both ETPU_A[9] and GPIO[123] when configured as outputs.
2
The IBE bit must be set to one for both ETPU_A[9] and GPIO[123] when configured as inputs. When configured as
ETPU_A[21] or when ETPU_A[9] or GPIO[123] are configured as outputs, the IBE bit may be set to one to reflect
the pin state in the corresponding GPDI register.
3
The weak pull up/down selection at reset for the ETPU_A[9] pin is determined by the WKPCFG pin.
Signal
Primary ETPU_A[9]
ALT1 ETPU_A[21]
ALT2 RCH1_B
GPIO GPIO[123]
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.
466
Table 16-111. SIU_PCR122 PA values
Name Module
eTPU
eTPU
DSPI
SIU
2 3 4 5 6
0 PA OBE
0 0 0 0 0
Figure 16-109. Pad Configuration Register (SIU_PCR123)
Table 16-112. SIU_PCR123 PA values
Name Module
eTPU
eTPU
Reaction
SIU
MPC5644A Microcontroller Reference Manual, Rev. 6
Description
eTPU channel I/O
eTPU channel O
LVDS+ output O
GPIO I/O
7 8 9 10
1 2
IBE 0 0 ODE
0 0 0 0
Description
eTPU channel I/O
eTPU channel O
Reaction channel O
GPIO I/O
1,2
I/O PA value
0b001
0b010
0b100
0b000
11 12 13 14 15
HYS SRC WPE WPS
0 0 0 1 WKP
1,2
I/O PA value
0b001
0b010
0b100
0b000
Freescale Semiconductor
3