MC68HC711KS2MFN4 Freescale Semiconductor, MC68HC711KS2MFN4 Datasheet - Page 138

• Manufacturer Part Number: MC68HC711KS2MFN4
• Description: 32K EPROM - SLOW MODE
• Manufacturer: Freescale Semiconductor

Parallel Input/Output
6.3 Port A
Technical Data
138
Alternate Pin Function:
Address: $0000
Address: $0001
Port A provides the I/O lines for the timer functions and pulse
accumulator. The eight port A bits (PA[7:0]) are configured as
high-impedance general-purpose inputs out of reset. Writes to DDRA
can change any of the bits to outputs. Writes to timer registers enable
the various timer functions (see
DDA[7:0] — Data Direction for Port A Bits
And/or:
Reset:
Reset:
Read:
Read:
Write:
Write:
Figure 6-2. Port A Data Direction Register (DDRA)
0 = Input
1 = Output
DDA7
Figure 6-1. Port A Data Register (PORTA)
OC1
Bit 7
Bit 7
PA7
PAI
0
Parallel Input/Output
DDA6
OC2
OC1
PA6
6
6
0
DDA5
OC3
OC1
PA5
5
5
0
Undefined after reset
Section 9. Timing
DDA4
OC4
OC1
PA4
4
4
0
IC4/OC5
DDA3
OC1
PA3
3
3
0
DDA2
PA2
IC1
—
2
2
0
System).
M68HC11K Family
DDA1
PA1
IC2
—
1
1
0
MOTOROLA
DDA0
Bit 0
Bit 0
PA0
IC3
—
0