MC68HC05RC17 Datasheet, PDF (62/128 Pages) Freescale Semiconductor, Inc – General Release Specification

Freescale Semiconductor, Inc.
Parallel Input/Output (I/O)
Table 7-1. I/O Pin Functions
R/W DDR
I/O Pin Functions
0
0
The I/O pin is in input mode. Data is written into the output data
latch.
0
1 Data is written into the output data latch and output to the I/O pin.
1
0 The state of the I/O pin is read.
1
1 The I/O pin is in an output mode. The output data latch is read.
DATA DIRECTION
REGISTER BIT
INTERNAL
HC05
CONNECTIONS
LATCHED
OUTPUT
DATA BIT
I/O
OUTPUT
PIN
INPUT
REG
BIT
INPUT
I/O
Figure 7-2. I/O Circuitry
General Release Specification
MC68HC05RC17 — Rev. 2.0
Parallel Input/Output (I/O)
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