MC68HC705B16CFN Freescale Semiconductor, MC68HC705B16CFN Datasheet - Page 101

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MC68HC705B16CFN

Manufacturer Part Number
MC68HC705B16CFN
Description
IC MCU 2.1MHZ 15K OTP 52-PLCC
Manufacturer
Freescale Semiconductor
Series
HC05r
Datasheet

Specifications of MC68HC705B16CFN

Core Processor
HC05
Core Size
8-Bit
Speed
2.1MHz
Connectivity
SCI
Peripherals
POR, WDT
Number Of I /o
32
Program Memory Size
15KB (15K x 8)
Program Memory Type
OTP
Eeprom Size
256 x 8
Ram Size
352 x 8
Voltage - Supply (vcc/vdd)
4.5 V ~ 5.5 V
Data Converters
A/D 8x8b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
52-PLCC
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant

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8.2
8.2.1
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:
8.2.2
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.
MC68HC05B6
Rev. 4.1
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)
Address
Address
ANALOG TO DIGITAL CONVERTER
$0003
$0008
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
bit 2
PD2
bit 2
DD
or V
PD1
bit 1
bit 1
SS
on the pins will
bit 0
PD0
bit 0
Freescale
0000 0000
Undefined
on reset
on reset
State
State
8-3
8

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