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Register Bit Range = [4:5]
Register Address
f
SIU_BASE+0x40
0
Read values
R
0
Write values
W
Reset values
Reset
0
1
OBE bit is significant in GPIO
2
IBE bit is significant in GPIO
Signal
Primary
CS[0]
ALT1
ADDR[8]
GPIO
GPIO[0]
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.
Field Bit Range = [1:0]
1
2
3
4
5
6
0
0
0
PA
OBE
0
0
0
0
0
0
= Unimplemented or Reserved
"Signal" refers to position in
muxing order—Primary, ALT1,
ALT2, ALT3 or GPIO.
Name
Module
Description
EBI
Chip select
EBI
Address bus
EBI
GPIO
Figure 16-15. Sample PCR map
Bit Number
Footnote
Field Name
7
8
9
10
11
1
2
IBE
DSC
ODE
HYS
0
1
1
0
0
Signal I/O direction.
I - Input
O - Output
I/O - Input or output
1,2
I/O
PA value
O
0b01
I/O
0b10
I/O
0b00
12
13
14
15
0
0
WPE WPS
0
0
1
1
PA field value
required to
select a
signal for the
pin controlled
by this PCR.
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