MC908AZ32ACFU Freescale Semiconductor, MC908AZ32ACFU Datasheet - Page 232

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MC908AZ32ACFU

Manufacturer Part Number
MC908AZ32ACFU
Description
IC MCU 32K FLASH 8.4MHZ 64-QFP
Manufacturer
Freescale Semiconductor
Series
HC08r
Datasheet

Specifications of MC908AZ32ACFU

Core Processor
HC08
Core Size
8-Bit
Speed
8MHz
Connectivity
CAN, SCI, SPI
Peripherals
LVD, POR, PWM
Number Of I /o
40
Program Memory Size
32KB (32K x 8)
Program Memory Type
FLASH
Eeprom Size
512 x 8
Ram Size
1K x 8
Voltage - Supply (vcc/vdd)
4.5 V ~ 5.5 V
Data Converters
A/D 15x8b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
64-QFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant

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Analog-To-Digital Converter (ADC-15)
21.6 I/O Signals
The ADC module has 15 channels that are shared with I/O ports B and D. Refer to
Characteristics
21.6.1 ADC Analog Power Pin (V
The ADC analog portion uses V
voltage potential as V
V
21.6.2 ADC Analog Ground Pin (V
The ADC analog portion uses V
as V
V
21.6.3 ADC Voltage In (ADCVIN)
ADCVIN is the input voltage signal from one of the 15 ADC channels to the ADC module.
21.7 I/O Registers
These I/O registers control and monitor ADC operation:
21.7.1 ADC Status and Control Register
The following paragraphs describe the function of the ADC status and control register.
232
REFH
REFL
SS
ADC status and control register (ADSCR)
ADC data register (ADR)
ADC clock register (ADICLK)
is the lower reference supply for the ADC.
.
is the high reference voltage for all analog-to-digital conversions.
Address:
Route V
capacitors as close as possible to the package. V
for operation of the ADC.
for voltages referenced below.
Reset:
Read:
Write:
DD
Figure 21-2. ADC Status and Control Register (ADSCR)
DDAREF
COCO
$0038
Bit 7
. External filtering may be necessary to ensure clean V
R
R
0
= Reserved
carefully for maximum noise immunity and place bypass
SSA
DDAREF
AIEN
6
0
as its ground pin. Connect the V
MC68HC908AZ32A Data Sheet, Rev. 2
DDAREF
as its power pin. Connect the V
SSA
ADCO
5
0
)/ADC Voltage Reference Low Pin (V
)/ADC Voltage Reference Pin (V
NOTE
CH4
4
1
CH3
3
1
DDAREF
SSA
CH2
2
1
DDA
pin to the same voltage potential
must be present
/V
DDAREF
CH1
1
1
DDAREF
Freescale Semiconductor
25.1.6 ADC
REFH
pin to the same
Bit 0
CH0
REFL
for good results.
1
)
)

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