NXP Semiconductors MPC5644A, Reference Manual, Page: 441 / 1735

System Integration Unit (SIU)
MPC5644A Microcontroller Reference Manual, Rev. 6
Freescale Semiconductor 441
16.6.15.50 Pad Configuration Register 84 (SIU_PCR84)
Figure 16-72. Pad Configuration Register (SIU_PCR84)
ALT1 SCI_A_TX eSCI eSCI transmit O 0b10
GPIO GPIO[83] SIU GPIO I/O 0b00
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.
S0xE8
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
R
0 0 0 0 PA OBE
1
1
When configured as CAN_A_RX or SCI_A_RX, the OBE bit has no effect. When configured as GPO, the OBE bit
should be set to one.
IBE
2
2
When configured as 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 HYS SRC WPE WPS
W
Reset
0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1
= Unimplemented or Reserved
Table 16-75. SIU_PCR84 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 CAN_A_RX FlexCAN FlexCAN receive I 0b01
ALT1 SCI_A_RX eSCI eSCI receive I 0b10
GPIO GPIO[84] SIU GPIO I/O 0b00
Table 16-74. SIU_PCR83 PA values
Signal Name Module Description I/O
1,2
PA value