MC68HC705JP7 Datasheet, PDF (104/242 Pages) Motorola, Inc – HCMOS Microcontroller Unit

Freescale Semiconductor, Inc.
Parallel Input/Output
READ $0006
WRITE $0006
DATA DIRECTION
REGISTER C
R
BIT DDRCx
WRITE $0002
PORT C DATA
REGISTER
PCx
BIT PCx
READ $0002
WRITE $0010
RESET
PULLDOWN
REGISTER A
BIT PDICx
R
MASK OPTION REGISTER ($1FF1)
Figure 7-15. Port C I/O Circuit
HIGH SINK/SOURCE
CURRENT CAPABILITY
PULLDOWN
DEVICE
Table 7-4. Port C Pin Functions (28-Pin Versions Only)
Port C
Pin(s)
SWPDI
in MOR
Control Bits
Port C
PDICH PDICL _DDRCx⁽¹⁾
0
X⁽²⁾
0
0
PC0
PC1
0
X⁽²⁾
1
0
PC2
1
PC3
X
X⁽²⁾
0
X⁽²⁾
X⁽²⁾
X⁽²⁾
1
0
0
X⁽²⁾
0
PC4
PC5
0
1
X⁽²⁾
0
PC6
1
PC7
X
X⁽²⁾
0
X⁽²⁾
X⁽²⁾
X⁽²⁾
1
1. DDRC can always be read or written.
2. Don’t care
PORTC Access
(Pin or Data Register)
Read
Write
Pin
Data
Pin
Data
Pin
Data
Data
Data
Pin
Data
Pin
Data
Pin
Data
Data
Data
Result on
Port C Pins
Pulldown
Pin
On
PCx in
Off
PCx in
Off
PCx in
Off
PCx out
On
PCx in
Off
PCx in
Off
PCx in
Off
PCx out
Advance Information
104
MC68HC705JJ7 • MC68HC705JP7 — REV 4
Parallel Input/Output
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