mpc823rg Freescale Semiconductor, Inc, mpc823rg Datasheet - Page 934

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

Communication Processor Module
16.14.6 The Port B Registers
Port B has four memory-mapped, read-write control registers.
16.14.6.1 PORT B OPEN-DRAIN REGISTER. The 16-bit port B open drain register
(PBODR) indicates when the port pins are configured in a a normal or wired-OR
configuration. Bits 0 and 15 of this register are reserved.
Bits 0–15—Reserved
These bits are reserved and must be set to 0.
OD16–OD31—Open-Drain Pins 16-31
PBODR
RESET
RESET
FIELD
ADDR
FIELD
ADDR
R/W
R/W
BIT
BIT
0 = The I/O pin is actively driven as an output.
1 = The I/O pin is an open-drain driver. As an output, the pin is actively driven low.
Otherwise, it is three-stated.
OD16 OD17 OD18 OD19 OD20 OD21 OD22 OD23 OD24 OD25 OD26 OD27 OD28 OD29 OD30 OD31
R/W
16
0
0
Note: SMTXD1 cannot be set as an open-drain driver, regardless of how this register
R/W
17
1
0
R/W
18
is set.
2
0
Freescale Semiconductor, Inc.
R/W
For More Information On This Product,
19
3
0
R/W
20
MPC823 REFERENCE MANUAL
4
0
Go to: www.freescale.com
R/W
21
5
0
(IMMR & 0xFFFF0000) + 0x
(IMMR & 0xFFFF0000) + 0x
R/W
22
6
0
R/W
RESERVED
23
7
0
R/W
0
R/W
24
8
0
R/W
25
9
0
AC0
AC2
R/W
10
26
0
R/W
11
27
0
R/W
12
28
0
R/W
13
29
0
MOTOROLA
R/W
14
30
0
R/W
15
31
0