NXP Semiconductors MPC5644A, Reference Manual, Page: 470 / 1735

System Integration Unit (SIU)
MPC5644A Microcontroller Reference Manual, Rev. 6
470 Freescale Semiconductor
16.6.15.82 Pad Configuration Register 129 (SIU_PCR129)
Figure 16-115. Pad Configuration Register (SIU_PCR129)
ALT2 ETPU_A[9] eTPU eTPU channel O 0b0100
ALT3 RCH0_A Reaction Reaction channel O 0b1000
GPIO GPIO[128] SIU GPIO I/O 0b0000
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.
S0x142
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
R
0 0 0 PA OBE
1
1
The OBE bit must be set to one for both ETPUA and GPIO when configured as outputs.
IBE
2
2
The IBE bit must be set to one for both ETPUA and GPIO when configured as inputs. When configured as PCS, or
ETPUA or GPO outputs, the IBE bit may be set to one to reflect the pin state in the corresponding GPDI register.
0 0 ODE HYS SRC WPE WPS
3
3
The weak pull up/down selection at reset for the ETPU_A[15] pin is determined by the WKPCFG pin.
W
Reset
0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 WKP
= Unimplemented or Reserved
Table 16-118. SIU_PCR129 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 ETPU_A[15] eTPU eTPU channel I/O 0b001
ALT1 DSPI_B_PCS[5] DSPI Chip select O 0b010
ALT2 RCH1_A Reaction Reaction channel O 0b100
GPIO GPIO[129] SIU GPIO I/O 0b000
Table 16-117. SIU_PCR128 PA values
Signal Name Module Description I/O
1,2
PA value