68HC08KL8 Datasheet, PDF (200/256 Pages) Freescale Semiconductor, Inc – General Release Specification

Freescale Semiconductor, Inc.
Input/Output Ports (I/O)
When bit DDRCx is a logic 1, reading address $0002 reads the PTCx
data latch. When bit DDRCx is a logic 0, reading address $0002 reads
the voltage level on the pin. The data latch can always be written,
regardless of the state of its data direction bit. Table 12-3 summarizes
the operation of the port C pins.
Table 12-3. Port C Pin Functions
DDRC
Bit
PTC Bit
I/O Pin Mode
0
X⁽¹⁾
Input, Hi-Z⁽²⁾
1
X
Output
Accesses
to DDRC
Read/Write
DDRC[7:0]
DDRC[7:0]
Accesses to PTC
Read
Pin
PTC[7:0]
Write
PTC[7:0]⁽³⁾
PTC[7:0]
1. X = don’t care
2. Hi-Z = high impedance
3. Writing affects data register, but does not affect input.
General Release Specification
Input/Output Ports (I/O)
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MC68HC08KL8 — Rev. 2.0