NXP Semiconductors MPC5644A Reference Manual page 484

System Integration Unit (SIU)
Signal
Primary EMIOS[3]
ALT1 ETPU_A[3]
GPIO GPIO[182]
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.
16.6.15.103Pad Configuration Register 183 (SIU_PCR183)
SIU_BASE+0x1AE
0 1
R
0 0
W
Reset
0 0
= Unimplemented or Reserved
1
The OBE bit must be set to one for both EMIOS[4] and GPIO[183] when configured as outputs.
2
When configured as ETPU, 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. The IBE bit must be set to one for both EMIOS[4] and
GPIO[183] when configured as inputs.
3
The weak pull up/down selection at reset for the EMIOS[4] pin is determined by the WKPCFG pin.
Signal
Primary EMIOS[4]
ALT1 ETPU_A[4]
ALT2 RCH2_C
GPIO GPIO[183]
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.
484
Table 16-138. SIU_PCR182 PA values
Name Module
eMIOS
eTPU
SIU
2 3 4 5 6
0 PA OBE
0 0 0 0 0
Figure 16-136. Pad Configuration Register (SIU_PCR183)
Table 16-139. SIU_PCR183 PA values
Name Module
eMIOS
eTPU
Reaction
SIU
MPC5644A Microcontroller Reference Manual, Rev. 6
Description
eMIOS channel I/O
eTPU channel O
GPIO I/O
7 8 9 10
1 2
IBE 0 0 ODE
0 0 0 0
Description
eMIOS channel I/O
eTPU channel O
Reaction channel O
GPIO I/O
1,2
I/O PA value
0b01
0b10
0b00
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