MC908AZ32ACFU Freescale Semiconductor, MC908AZ32ACFU Datasheet - Page 229

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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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Chapter 21
Analog-To-Digital Converter (ADC-15)
21.1 Introduction
This section describes the analog-to-digital converter (ADC-15). The ADC is an 8-bit analog-to-digital
converter.
21.2 Features
Features of the ADC module include:
21.3 Functional Description
Fifteen ADC channels are available for sampling external sources at pins
PTD6/ATD14/TCLK
converter to select one of 15 ADC channels as ADC voltage in (ADCVIN). ADCVIN is converted by the
successive approximation register-based counters. When the conversion is completed, ADC places the
result in the ADC data register and sets a flag or generates an interrupt. See
21.3.1 ADC Port I/O Pins
PTD6/ATD14/TCLK
channels.
The channel select bits define which ADC channel/port pin will be used as the input signal. The ADC
overrides the port I/O logic by forcing that pin as input to the ADC. The remaining ADC channels/port pins
are controlled by the port I/O logic and can be used as general-purpose I/O. Writes to the port register or
DDR will not have any affect on the port pin that is selected by the ADC. Read of a port pin which is in
use by the ADC will return a logic 0 if the corresponding DDR bit is at logic 0. If the DDR bit is at logic 1,
the value in the port data latch is read.
Freescale Semiconductor
15 Channels with Multiplexed Input
Linear Successive Approximation
8-Bit Resolution
Single or Continuous Conversion
Conversion Complete Flag or Conversion Complete Interrupt
Selectable ADC Clock
Do not use ADC channels ATD14 or ATD12 when using the
PTD6/ATD14/TCLK or PTD4/ATD12 pins as the clock inputs for the 16-bit
Timers.
PTD0/ATD8 and PTB7
PTD0/ATD8 and PTB7
MC68HC908AZ32A Data Sheet, Rev. 2
PTB0 are general-purpose I/O pins that share with the ADC
PTB0. An analog multiplexer allows the single ADC
NOTE
Figure
21-1.
229

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