MC68HC705C8ACB Freescale Semiconductor, MC68HC705C8ACB Datasheet - Page 88

• 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)
7.6 Port D
Technical Data
88
Address:
Port D is a 7-bit, special-purpose, input-only port that has no data
register. Reading address $0003 returns the logic states of the port D
pins.
Port D shares pins PD5–PD2 with the serial peripheral interface module
(SPI). When the SPI is enabled, PD5–PD2 read as logic 0s. When the
SPI is disabled, reading address $0003 returns the logic states of the
PD5–PD2 pins.
Port D shares pins PD1 and PD0 with the SCI module. When the SCI is
enabled, PD1 and PD0 read as logic 0s. When the SCI is disabled,
reading address $0003 returns the logic states of the PD1 and PD0 pins.
Reset:
Read:
Write:
Freescale Semiconductor, Inc.
For More Information On This Product,
$0003
Figure 7-10. Port D Fixed Input Register (PORTD)
Bit 7
PD7
Go to: www.freescale.com
Parallel Input/Output (I/O)
= Unimplemented
6
SS
5
Unaffected by reset
SCK
4
MOSI
3
MC68HC705C8A — Rev. 3
MISO
2
TDO
1
Bit 0
RDI