MC68HC705X32CFU Freescale Semiconductor, MC68HC705X32CFU Datasheet - Page 131

• Manufacturer Part Number: MC68HC705X32CFU
• Manufacturer: Freescale Semiconductor

Specifications of MC68HC705X32CFU

• Cpu Family: HC05
• Device Core Size: 8b
• Frequency (max): 4MHz
• Interface Type: SCI
• Program Memory Type: EPROM
• Program Memory Size: 32KB
• Total Internal Ram Size: 528Byte
• # I/os (max): 32
• Number Of Timers - General Purpose: 1
• Operating Supply Voltage (typ): 5V
• Operating Supply Voltage (max): 5.5V
• Operating Supply Voltage (min): 4.5V
• On-chip Adc: 8-chx8-bit
• Instruction Set Architecture: CISC
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 64
• Package Type: PQFP
• Lead Free Status / Rohs Status: Supplier Unconfirmed

9.2
9.2.1
Port D is an input-only port which routes the eight analog inputs to the A/D converter. When the
A/D converter is disabled, the pins are configured as standard input-only port pins, which can be
read via the port D data register.
Note:
9.2.2
ADDATA is a read-only register which is used to store the results of A/D conversions. Each result
is loaded into the register from the SAR and the conversion complete flag, COCO, in the ADSTAT
register is set.
MC68HC05X16
Port D data (PORTD)
A/D data (ADDATA)
When the A/D function is enabled, pins PD0–PD7 will act as analog inputs. Using a pin
or pins as A/D inputs does not affect the ability to read port D as static inputs; however,
reading port D during an A/D conversion sequence may inject noise on the analog
inputs and result in reduced accuracy of the A/D result.
Performing a digital read of port D with levels other than V
result in greater power dissipation during the read cycle, and may give unpredictable
results on the corresponding port D pins.
A/D registers
Port D data register (PORTD)
A/D result data register (ADDATA)
Freescale Semiconductor, Inc.
For More Information On This Product,
Address
Address
Go to: www.freescale.com
$0003
$0008
ANALOG TO DIGITAL CONVERTER
bit 7
PD7
bit 7
bit 6
PD6
bit 6
PD5
bit 5
bit 5
bit 4
PD4
bit 4
PD3
bit 3
bit 3
PD2
bit 2
bit 2
DD
or V
bit 1
PD1
bit 1
SS
on the pins will
PD0
bit 0
bit 0
0000 0000
Undefined
on reset
on reset
State
State
9-3
9