MC68HC705C8ACFN Freescale Semiconductor, MC68HC705C8ACFN Datasheet - Page 88

• Manufacturer Part Number: MC68HC705C8ACFN
• Description: IC MCU 4MHZ 8K OTP 44-PLCC
• Manufacturer: Freescale Semiconductor
• Series: HC05r

Specifications of MC68HC705C8ACFN

• Core Processor: HC05
• Core Size: 8-Bit
• Speed: 2.1MHz
• Connectivity: SCI, SPI
• Peripherals: POR, WDT
• Number Of I /o: 24
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: OTP
• Ram Size: 304 x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 44-PLCC
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Data Converters: -

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
MOTOROLA
Bit 0
RDI