MC68HC705KJ1CDW Freescale Semiconductor, MC68HC705KJ1CDW Datasheet - Page 64

• Manufacturer Part Number: MC68HC705KJ1CDW
• Description: IC MCU 4MHZ 1.2K OTP 16-SOIC
• Manufacturer: Freescale Semiconductor
• Series: HC05r

Specifications of MC68HC705KJ1CDW

• Core Processor: HC05
• Core Size: 8-Bit
• Speed: 4MHz
• Peripherals: POR, WDT
• Number Of I /o: 10
• Program Memory Size: 1.2KB (1.2K x 8)
• Program Memory Type: OTP
• Ram Size: 64 x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 16-SOIC (0.300", 7.5mm Width)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Data Converters: -
• Connectivity: -

Parallel I/O Ports (PORTS)
7.2 Port A
Port A is an 8-bit bidirectional port.
7.2.1 Port A Data Register
The port A data register contains a latch for each port A pin.
PA[7:0] — Port A Data Bits
7.2.2 Data Direction Register A
Data direction register A determines whether each port A pin is an input or an output.
DDRA[7:0] — Data Direction Register A Bits
Figure 7-4
64
These read/write bits are software programmable. Data direction of each port A pin is under the control
of the corresponding bit in data direction register A. Reset has no effect on port A data.
These read/write bits control port A data direction. Reset clears DDRA[7:0], configuring all port A pins
as inputs.
1 = Corresponding port A pin configured as output
0 = Corresponding port A pin configured as input
shows the I/O logic of port A.
Address:
Address:
Avoid glitches on port A pins by writing to the port A data register before
changing data direction register A bits from 0 to 1.
Reset:
Reset:
Read:
Read:
Write:
Write:
MC68HC705KJ1 • MC68HRC705KJ1 • MC68HLC705KJ1 Data Sheet, Rev. 4.1
DDRA7
$0000
$0004
Bit 7
PA7
Bit 7
0
Figure 7-3. Data Direction Register A (DDRA)
Figure 7-2. Port A Data Register (PORTA)
DDRA6
PA6
6
6
0
DDRA5
PA5
5
5
0
NOTE
DDRA4
Unaffected by reset
PA4
4
4
0
DDRA3
PA3
3
3
0
DDRA2
PA2
2
2
0
DDRA1
PA1
1
1
0
Freescale Semiconductor
DDRA0
Bit 0
Bit 0
PA0
0