System Interface Unit (SIU)
MPC5553/MPC5554 Microcontroller Reference Manual,
Rev. 5
6-22
Freescale Semiconductor
6.3.1.12.1
Pad Configuration Registers 0–3 (SIU_PCR0–SIU_PCR3)
The SIU_PCR0–SIU_PCR3 registers control the pin function, direction, and static electrical attributes of
the CS[0:3]_ADDR[8:11]_GPIO[0:3] pins.
Figure 6-15. CS[0:3]_ADDR[8:11]_GPIO[0:3] Pad Configuration Registers (SIU_PCR0–SIU_PCR3)
Refer to
for bit field definitions.
12–13
SRC[0:1]
Slew rate control. Controls slew rate for the pad. Slew rate control pertains to pins with slow
or medium I/O pad types (SH and MH), and the output signals are driven according to the
value of this field. Actual slew rate depends on the pad type and load. Refer to the electrical
specification for this information:
00 Minimum slew rate
01 Medium slew rate
10 Reserved
11 Maximum slew rate
14
WPE
Weak pullup/down enable. Controls whether the weak pullup/down devices are
enabled/disabled for the pad. pullup/down devices are enabled by default.
0 Weak pull device is disabled for the pad.
1 Weak pull device is enabled for the pad.
15
WPS
Weak pullup/down select. Controls whether weak pullup or weak pulldown devices are
used for the pad when weak pullup/down devices are enabled. The WKPCFG pin
determines whether pullup or pulldown devices are enabled at reset. The WPS bit
determines whether weak pullup or pulldown devices are used after reset, or for pads in
which the WKPCFG pin does not determine the reset weak pullup/down state.
0 The pulldown value is enabled for the pad.
1 The pullup value is enabled for the pad.
Address: Base + 0x0040 through Base + 0x0046
Access: Read/ write[3:11, 14:15]
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
R
0
0
0
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 CS[0:3] or ADDR[8:11], the OBE bit has no effect. When configured as GPO, set the OBE bit to 1.
IBE
3
3
When configured as CS[0:3], ADDR[8:11] (only MPC5554), or GPI, 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 CS[0:3] or ADDR[8:11] (only MPC5554), clear the ODE bit to 0.
HYS
0
0
WPE
5
5
Refer to the EBI section for weak pullup settings when configured as CS[0:3] or ADDR[8:11] (only MPC5554).
W
RESET:
0
0
0
0
0
0
0
0
1
1
0
0
0
0
1
1
Table 6-16. SIU_PCR Field Descriptions
Register Bit Range
Field Name [Bits]
Description
Summary of Contents for MPC5553
Page 5: ...MPC5553 MPC5554 Microcontroller Reference Manual Rev 5 2 Freescale Semiconductor...
Page 21: ...MPC5553 MPC5554 Microcontroller Reference Manual Rev 5 xvi Freescale Semiconductor...
Page 47: ...MPC5553 MPC5554 Microcontroller Reference Manual Rev 5 1 26 Freescale Semiconductor...
Page 163: ...MPC5553 MPC5554 Microcontroller Reference Manual Rev 5 4 20 Freescale Semiconductor...
Page 179: ...MPC5553 MPC5554 Microcontroller Reference Manual Rev 5 5 16 Freescale Semiconductor...
Page 561: ...MPC5553 MPC5554 Microcontroller Reference Manual Rev 5 13 38 Freescale Semiconductor...
Page 615: ...MPC5553 MPC5554 Microcontroller Reference Manual Rev 5 14 54 Freescale Semiconductor...
Page 707: ...MPC5553 MPC5554 Microcontroller Reference Manual Rev 5 17 68 Freescale Semiconductor...
Page 755: ...MPC5553 MPC5554 Microcontroller Reference Manual Rev 5 18 48 Freescale Semiconductor...
Page 873: ...MPC5553 MPC5554 Microcontroller Reference Manual Rev 5 19 118 Freescale Semiconductor...
Page 984: ...MPC5553 MPC5554 Microcontroller Reference Manual Rev 5 Freescale Semiconductor 21 41...
Page 985: ...MPC5553 MPC5554 Microcontroller Reference Manual Rev 5 21 42 Freescale Semiconductor...
Page 1019: ...MPC5553 MPC5554 Microcontroller Reference Manual Rev 5 22 34 Freescale Semiconductor...
Page 1129: ...MPC5553 MPC5554 Microcontroller Reference Manual Rev 5 25 90 Freescale Semiconductor...