NXP Semiconductors MPC5644A Reference Manual page 441

Signal
ALT1 SCI_A_TX
GPIO GPIO[83]
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.
16.6.15.50 Pad Configuration Register 84 (SIU_PCR84)
SIU_BASE+0xE8
0 1
R
0 0
W
Reset
0 0
= Unimplemented or Reserved
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.
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.
Signal
Primary CAN_A_RX
ALT1 SCI_A_RX
GPIO GPIO[84]
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 16-74. SIU_PCR83 PA values
Name Module
eSCI
SIU
2 3 4 5 6
1
0 0 PA OBE
0 0 0 0 0
Figure 16-72. Pad Configuration Register (SIU_PCR84)
Table 16-75. SIU_PCR84 PA values
Name Module
FlexCAN
eSCI
SIU
MPC5644A Microcontroller Reference Manual, Rev. 6
Description I/O
eSCI transmit O
GPIO I/O
7 8 9 10 11
2
IBE 0 0 ODE HYS
0 0 0 0 0
Description I/O
FlexCAN receive I
eSCI receive I
GPIO I/O
System Integration Unit (SIU)
1,2
PA value
0b10
0b00
12 13 14 15
SRC WPE WPS
0 0 1 1
1,2
PA value
0b01
0b10
0b00
441