MC68HC908JL3ECFA Freescale Semiconductor, MC68HC908JL3ECFA Datasheet - Page 100

• Manufacturer Part Number: MC68HC908JL3ECFA
• Description: IC MCU 4K FLASH 8MHZ 48-LQFP
• Manufacturer: Freescale Semiconductor
• Series: HC08r

Specifications of MC68HC908JL3ECFA

• Core Processor: HC08
• Core Size: 8-Bit
• Speed: 8MHz
• Peripherals: LED, LVD, POR, PWM
• Number Of I /o: 23
• Program Memory Size: 4KB (4K x 8)
• Program Memory Type: FLASH
• Ram Size: 128 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 3.3 V
• Data Converters: A/D 12x8b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 48-LQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Connectivity: -

Analog-to-Digital Converter (ADC)
9.5.2 Stop Mode
The ADC module is inactive after the execution of a STOP instruction. Any pending conversion is aborted.
ADC conversions resume when the MCU exits stop mode. Allow one conversion cycle to stabilize the
analog circuitry before attempting a new ADC conversion after exiting stop mode.
9.6 I/O Signals
The ADC module has 12 channels that are shared with I/O port B and port D.
9.6.1 ADC Voltage In (ADCVIN)
ADCVIN is the input voltage signal from one of the 12 ADC channels to the ADC module.
9.7 I/O Registers
These I/O registers control and monitor ADC operation:
9.7.1 ADC Status and Control Register
The following paragraphs describe the function of the ADC status and control register.
COCO — Conversions Complete Bit
AIEN — ADC Interrupt Enable Bit
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When the AIEN bit is a 0, the COCO is a read-only bit which is set each time a conversion is completed.
This bit is cleared whenever the ADC status and control register is written or whenever the ADC data
register is read. Reset clears this bit.
When the AIEN bit is a 1 (CPU interrupt enabled), the COCO is a read-only bit, and will always be 0
when read.
When this bit is set, an interrupt is generated at the end of an ADC conversion. The interrupt signal is
cleared when the data register is read or the status/control register is written. Reset clears the AIEN bit.
1 = Conversion completed (AIEN = 0)
0 = Conversion not completed (AIEN = 0)
1 = ADC interrupt enabled
0 = ADC interrupt disabled
ADC status and control register (ADSCR)
ADC data register (ADR)
ADC clock register (ADICLK)
Address:
Reset:
Read:
Write:
$003C
COCO
Figure 9-3. ADC Status and Control Register (ADSCR)
Bit 7
0
= Unimplemented
AIEN
MC68HC908JL3E Family Data Sheet, Rev. 4
6
0
ADCO
5
0
ADCH4
4
1
ADCH3
3
1
ADCH2
2
1
ADCH1
1
1
Freescale Semiconductor
ADCH0
Bit 0
1