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PKDATA
BIT 7
TYPE
RESET
Name
Dx
Data—These bits reflect the status of
Bits 7–0
the I/O signal in an 8-bit system.
Port K is multiplexed with the IrDA, SPI, and LCD controller signals. These pins can be programmed as
GPIO when the dedicated I/O signals are not in use.
These bits control or report the data on the pins while the associated SELx bits are high. While the DIRx
bits are high (output), the Dx bits control the pins. While the DIRx bits are low (input), the Dx bits report
the signal driving the pins. The Dx bits can be written at any time. Bits that are configured as inputs will
accept the data, but the data written to each cannot be accessed until the corresponding pin is configured as
an output. The actual value on the pin is reported when these bits are read, regardless of whether they are
configured as input or output.
10.4.10.3
Port K Dedicated I/O Functions
The eight PKDATA lines are multiplexed with the dedicated I/O signals whose assignments are shown in
Table 10-48.
Table 10-48. Port K Dedicated I/O Function Assignments
Port K Data Register
6
5
D7
D6
D5
rw
rw
rw
0
0
0
*Actual bit value depends on external circuits connected to pin.
Table 10-47. Port K Data Register Description
Description
Bit
GPIO Function
0
Data bit 0
1
Data bit 1
2
Data bit 2
3
Data bit 3
4
Data bit 4
5
Data bit 5
6
Data bit 6
7
Data bit 7
4
3
D4
D3
rw
rw
0
1
0x0F*
0 = Drives the output signal low when DIRx is set to 1 or the
external signal is low when DIRx is set to 0
1 = Drives the output signal high when DIRx is set to 1 or the
external signal is high when DIRx is set to 0
Dedicated I/O Function
DATA_READY/PWM2
RW
LDS
UDS
LD4
LD5
LD6
LD7
I/O Ports
Programming Model
0x(FF)FFF441
2
1
BIT 0
D2
D1
rw
rw
1
1
Setting
D0
rw
1
10-35
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