mpc823rg Freescale Semiconductor, Inc, mpc823rg Datasheet - Page 935

• Manufacturer Part Number: mpc823rg
• Description: Mpc823 Powerquicc Integrated Communications Processor For Portable Systems
• Manufacturer: Freescale Semiconductor, Inc

16.14.6.2 PORT B DATA REGISTER. A read of the port B data register (PBDAT) returns
the data to the pin, regardless of whether the pin is defined as an input or output. This allows
output conflicts to be found on the pin by comparing the written data with the data on the pin.
A write to the PBDAT is latched and if that bit in the PBDIR is configured as an output, the
value latched for that bit is driven onto its respective pin. PBDAT can be read or written at
any time, is not initialized, and is undefined at reset.
Bits 0–15—Reserved
These bits are reserved and must be set to 0.
D16–31—Data Pins 16–31
These bits contain data can be read or written from the port B pins.
PBDAT
RESET
RESET
FIELD
ADDR
FIELD
ADDR
R/W
R/W
BIT
BIT
R/W
D16
16
—
0
R/W
D17
17
—
1
R/W
D18
18
—
2
Freescale Semiconductor, Inc.
R/W
D19
For More Information On This Product,
19
—
3
R/W
D20
20
—
MPC823 REFERENCE MANUAL
4
Go to: www.freescale.com
R/W
D21
21
—
5
(IMMR & 0xFFFF0000) + 0xAC6
(IMMR & 0xFFFF0000) + 0x
R/W
D22
22
—
6
R/W
D23
RESERVED
23
—
7
R/W
0
D24
R/W
24
—
8
D25
R/W
25
—
9
AC4
Communication Processor Module
D26
R/W
10
26
—
R/W
D27
11
27
—
R/W
D28
12
28
—
R/W
D29
13
29
—
R/W
D30
14
30
—
16-483
R/W
D31
15
31
—