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LH75400/01/10/11 (Preliminary) User's Guide
21.2.3.2 Port B Data Register
PBDR is the Port B Data Register. The active bits used in this register are Read/Write.
Values written to PBDR are output on the PB pins if the corresponding PBDDR Data Direc-
tion bits are set HIGH (port output).
The values read from each bit of this register are determined by the value of the corre-
sponding bit in the Port B Data Direction Register (see Section 21.2.3.4). A read from this
register returns either:
• The last bit value written if the bit is configured as an output.
• The current value on the corresponding port input if the bit is configured as an input.
A System Reset clears all bits.
BIT
FIELD
RESET
RW
BIT
FIELD
RESET
RW
ADDR
BITS
31:6
5:0
31
30
29
28
27
0
0
0
0
R
R
R
R
15
14
13
12
11
0
0
0
0
R
R
R
R
Table 21-6. PBDR Register Definitions
NAME
///
Reserved Writing to these bits has no effect. Reading returns 0.
Port B Input/Output Data Specifies Port B input or output data, depend-
ing on how the value of the corresponding bit in the PBDDR Register is set
(see Section 21.2.3.4).
Port B Data
PBDDR set as output = PBDR sets the value on the GPIO Port B pins.
PBDDR set as input = PBDR reads the value on the GPIO Port B pins.
Table 21-5. PBDR Register
26
25
24
23
///
0
0
0
0
0
R
R
R
R
R
10
9
8
7
///
0
0
0
0
0
R
R
R
R
R
0xFFFDF000 + 0x04
FUNCTION
6/17/03
General Purpose Input/Output
22
21
20
19
18
0
0
0
0
0
R
R
R
R
R
6
5
4
3
2
Port B Data
0
0
0
0
0
R
RW
RW
RW
RW
17
16
0
0
R
R
1
0
0
0
RW
RW
21-5
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