MC68HC705C8ACB Freescale Semiconductor, MC68HC705C8ACB Datasheet - Page 78

• Manufacturer Part Number: MC68HC705C8ACB
• Manufacturer: Freescale Semiconductor

Specifications of MC68HC705C8ACB

• Cpu Family: HC05
• Device Core Size: 8b
• Frequency (max): 2.1MHz
• Interface Type: SCI/SPI
• Program Memory Type: EPROM
• Program Memory Size: 8KB
• Total Internal Ram Size: 304Byte
• # I/os (max): 24
• Number Of Timers - General Purpose: 1
• Operating Supply Voltage (typ): 3.3/5V
• Operating Supply Voltage (max): 5.5V
• Operating Supply Voltage (min): 3V
• Instruction Set Architecture: CISC
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Through Hole
• Pin Count: 42
• Package Type: SPDIP
• Lead Free Status / Rohs Status: Not Compliant

Parallel Input/Output (I/O)
7.3 Port A
7.3.1 Port A Data Register
Technical Data
78
Address:
Port A is an 8-bit, general-purpose, bidirectional input/output (I/O) port.
The port A data register (PORTA) shown in
latch for each of the eight port A pins. When a port A pin is programmed
to be an output, the state of its data register bit determines the state of
the output pin. When a port A pin is programmed to be an input, reading
the port A data register returns the logic state of the pin.
PA7–PA0 — Port A Data Bits
Reset:
Read:
Write:
These read/write bits are software programmable. Data direction of
each bit is under the control of the corresponding bit in data direction
register A. Reset has no effect on port A data.
Freescale Semiconductor, Inc.
For More Information On This Product,
$0000
Bit 7
PA7
Go to: www.freescale.com
Figure 7-1. Port A Data Register (PORTA)
Parallel Input/Output (I/O)
PA6
6
PA5
5
Unaffected by reset
PA4
4
PA3
3
Figure 7-1
MC68HC705C8A — Rev. 3
PA2
2
contains a data
PA1
1
Bit 0
PA0