MC908AZ32ACFU Freescale Semiconductor, MC908AZ32ACFU Datasheet - Page 232
MC908AZ32ACFU
Manufacturer Part Number
MC908AZ32ACFU
Description
IC MCU 32K FLASH 8.4MHZ 64-QFP
Manufacturer
Freescale Semiconductor
Series
HC08r
Datasheet
1.MC908AZ32ACFUE.pdf
(324 pages)
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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