System Interface Unit (SIU)
MPC5553/MPC5554 Microcontroller Reference Manual, Rev. 5
Freescale Semiconductor 6-23
6.3.1.12.2 MPC5553: Pad Configuration Registers 4–7 (SIU_PCR4–SIU_PCR7)
The SIU_PCR4–SIU_PCR7 registers control the pin function, direction, and static electrical attributes of
the ADDR[8:11]_CAL_ADDR[27:30]_GPIO[4:7] pins.
Figure 6-16. MPC5553: ADDR[8:11]_CAL_ADDR[27:30]_GPIO[4:7]
Pad Configuration Registers (SIU_PCR4–SIU_PCR7)
Refer to Table 6-16 for bit field definitions. The PA field for PCR4–PCR7 is given in Table 6-17.
6.3.1.12.3 MPC5553: Pad Configuration Registers 8–27 (SIU_PCR8–SIU_PCR27)
NOTE
The definitions and settings for PCR8 through PCR27 for the MPC5554
device differ from the MPC5553 definitions and settings.
The SIU_PCR8–SIU_PCR27 registers control the pin function, direction, and static electrical attributes of
the ADDR[12:31]_GPIO[8:27] pins. The ADDR[12:26] pins are shared by the external bus interface
(EBI) and the calibration bus interface (CBI). Set the PA field to 0b1 in the SIU_PCR12–SUI_PCR26 to
use the EBI or CBI.
Address: Base + 0x0048 through Base + 0x0054 Access: Read / write[3:11, 14:15]
0123456789101112131415
R 000
PA
1
1
The PA fields in PCR0–3 and PCR4–7 must not be configured simultaneously to select ADDR[8:11] as an input. Only configure
one set of pins for address input.
OBE
2
2
When configured as ADDR[8:11] or CAL_ADDR[27:30], the OBE bit has no effect. When configured as GPO, set the OBE bit
to 1.
IBE
3
3
When configured as ADDR[8:11], CAL_ADDR[27:30], or GPO, set the IBE bit to 1 to reflect the pin state in the GPDI register.
Clearing the IBE bit to 0 reduces power consumption. When configured as GPI, set the IBE bit to 1.
DSC ODE
4
4
When configured as ADDR[8:11] or CAL_ADDR[27:30], clear the ODE bit to 0.
HYS
5
5
If external master operation is enabled, clear the HYS bit to 0.
00
WPE
6
6
Refer to the EBI section for weak pullup settings when configured as ADDR[8:11] or CAL_ADDR[27:30].
WPS
6
W
RESET: 000000001100001 1
Table 6-17. PCR4 through PCR7 PA Field Definition
PA Field Pin Function
0b000 GPIO[4:7]
0b001 ADDR[8:11]
0b010 Reserved
0b011 ADDR[8:11]
0b100 CAL_ADDR[27:30]
1
1
For calibration only.
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