MC68HC05JJ6 Datasheet, PDF (83/216 Pages) Freescale Semiconductor, Inc – General Release Specification Microcontrollers

Parallel Input/Output
READ $0004
WRITE $0004
WRITE $0000
READ $0000
WRITE $0010
RESET
DATA DIRECTION
REGISTER A
R
BIT DDRAx
PORT A DATA
REGISTER
BIT PAx
PULLDOWN
REGISTER A
R
BIT PDIAx
PULLDOWN INHIBIT
MASK OPTION
(ENABLE = 0)
Figure 7-4. Port A I/O Circuit
EXTERNAL
INTERRUPT
REQUEST
(PA0:PA3)
PAx
15 mA SINK
5 mA SOURCE
CAPABILITY
100 µA
PULLDOWN
DEVICE
Port A
Pin(s)
Mask
Option
Pulldown
Inhibit
Table 7-1. Port A Pin Functions
Port A
PORTA Access
(Pin or Data Register)
Result on
Port A Pins
PDIAn DDRAn*
Read
Write Pulldown
Pin
PA0
0
0
0
PA1
0
1
0
PA2
PA3
1
X
0
PA4
PA5
X
X
1
* DDRA can always be read or written.
X = Don’t Care
PIN
PIN
PIN
DATA
DATA
DATA
DATA
DATA
ON
OFF
OFF
OFF
PAn IN
PAn IN
PAn IN
PAn OUT
MC68HC05JJ6/MC68HC05JP6 — Rev. 3.2
Freescale Semiconductor
Parallel Input/Output
General Release Specification
83