mpc823rg Freescale Semiconductor, Inc, mpc823rg Datasheet - Page 941

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

16.14.9.1 PORT C DATA REGISTER. A read of the port C data register (PCDAT) 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 PCDAT is latched and if that bit in the PCDIR is configured as an output, the
value latched for that bit is driven onto its respective pin. PCDAT can be read or written at
any time, is not initialized, and is undefined at reset.
Bits 0–3—Reserved
These bits are reserved and must be set to 0.
D4–15—Data Pins 4–15
These bits contain data can be read or written from the port C pins.
16.14.9.2 PORT C DATA DIRECTION REGISTER. The port C data direction register
(PCDIR) is a 16-bit register that is cleared by system reset.
Bits 0–3—Reserved
These bits are reserved and must be set to 0.
DR4–DR15—Data Direction Pins 4–15
PCDAT
PCDIR
NOTE: — = Undefined.
RESET
RESET
FIELD
ADDR
FIELD
ADDR
R/W
R/W
BIT
BIT
0 = The corresponding pin is an input.
1 = The corresponding pin is an output.
R/W
R/W
0
0
0
0
RESERVED
RESERVED
R/W
R/W
1
0
1
0
R/W
R/W
2
0
2
0
Freescale Semiconductor, Inc.
R/W
R/W
For More Information On This Product,
3
0
3
0
R/W
DR4
R/W
D4
—
MPC823 REFERENCE MANUAL
4
4
0
Go to: www.freescale.com
R/W
DR5
R/W
D5
—
5
5
0
(IMMR & 0xFFFF0000) + 0x966
(IMMR & 0xFFFF0000) + 0x960
R/W
DR6
R/W
D6
—
6
6
0
DR7
R/W
R/W
D7
—
7
7
0
DR8
R/W
R/W
D8
—
8
8
0
DR9 DR10 DR11 DR12 DR13 DR14 DR15
R/W
R/W
D9
—
9
9
0
Communication Processor Module
D10
R/W
R/W
10
10
—
0
R/W
R/W
D11
11
—
11
0
R/W
R/W
D12
12
—
12
0
R/W
R/W
D13
13
—
13
0
R/W
R/W
D14
14
14
—
0
16-489
R/W
R/W
D15
15
15
—
0