System Interface Unit (SIU)
MPC5553/MPC5554 Microcontroller Reference Manual, Rev. 5
Freescale Semiconductor 6-73
6.3.1.12.78 Pad Configuration Register 134–141 (SIU_PCR134–SIU_PCR141)
The SIU_PCR134–SIU_PCR141 registers control the pin function, direction, and static electrical
attributes of the ETPUA[20:27]_IRQ[8:15]_GPIO[134:141] pins. Only the output channels of
ETPUA[24:27] are connected to pins. Both the input and output channels of ETPUA[20:23] are connected
to pins.
Figure 6-90. ETPUA[20:27]_IRQ[8:15]_GPIO[134:141]
Pad Configuration Register (SIU_PCR134–SIU_PCR141)
Refer to Table 6-16 for bit field definitions.
6.3.1.12.79 Pad Configuration Register 142 (SIU_PCR142)
The SIU_PCR142 register controls the pin function, direction, and static electrical attributes of the
ETPUA[28]_PCSC[1]_GPIO[142] pin. Only the output channel of ETPUA[28] is connected to the pin.
Figure 6-91. ETPUA[28]_PCSC[1]_GPIO[142] Pad Configuration Register (SIU_PCR142)
Refer to Table 6-16 for bit field definitions.
Address: Base + 0x014C through Base + 0x015A Access: Read / write[4:7, 10:15]
0123456789101112131415
R 0000
PA OBE
1
1
When configured as ETPUA[24:27] or IRQ, the OBE bit has no effect. The OBE bit must be set to 1 for ETPUA[20:23] or
GPIO[134:141] when configured as outputs.
IBE
2
2
When configured as ETPUA[24:27], IRQ, or GPO, set the IBE bit to 1 to reflect the pin state in the corresponding GPDI register.
Clear the IBE to 0 to reduce power consumption. The IBE bit must be set to 1 for ETPUA[20:23] or GPIO[134:141] when
configured as inputs.
00
ODE HYS SRC WPE WPS
W
RESET: 000000000000001U
3
3
The weak pullup/down selection at reset for the ETPUA[20:27] pins is determined by the WKPCFG pin.
Address: Base + 0x015C Access: Read / write[4:7, 10:15]
0123456789101112131415
R 0000
PA OBE
1
1
When configured as ETPUA or PCS, the OBE bit has no effect. When configured as GPO, set the OBE bit to 1.
IBE
2
2
When configured as ETPUA, PCS, or GPO, set the IBE bit to 1 to reflect the pin state in the corresponding GPDI register. Clear
the IBE to 0 to reduce power consumption. The IBE bit must be set to 1 for GPIO when configured as input.
00
ODE HYS SRC WPE WPS
W
RESET: 000000000000001U
3
3
The weak pullup/down selection at reset for the ETPUA[28] pin is determined by the WKPCFG pin.
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