S9S08SG8E2VTJR Freescale Semiconductor, S9S08SG8E2VTJR Datasheet - Page 150

• Manufacturer Part Number: S9S08SG8E2VTJR
• Description: 8-bit Microcontrollers - MCU 9S08 UC W/ 8K 0.25UM SGF
• Manufacturer: Freescale Semiconductor

Specifications of S9S08SG8E2VTJR

• Rohs: yes
• Core: HCS08
• Data Bus Width: 8 bit
• Maximum Clock Frequency: 40 MHz
• Program Memory Size: 8 KB
• Data Ram Size: 512 B
• On-chip Adc: Yes
• Operating Temperature Range: - 40 C to + 85 C
• Package / Case: TSSOP-20
• Mounting Style: SMD/SMT
• A/d Bit Size: 10 bit
• A/d Channels Available: 12
• Interface Type: I2C, SCI, SPI
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: - 40 C
• Number Of Programmable I/os: 16
• Number Of Timers: 3
• Program Memory Type: Flash
• Supply Voltage - Max: 5.5 V
• Supply Voltage - Min: 2.7 V

Chapter 9 Analog-to-Digital Converter (S08ADC10V1)
9.4.7.2
If ADACK is selected as the conversion clock, the ADC continues operation during stop3 mode. For
guaranteed ADC operation, the MCU’s voltage regulator must remain active during stop3 mode. Consult
the module introduction for configuration information for this MCU.
If a conversion is in progress when the MCU enters stop3 mode, it continues until completion. Conversions
can be initiated while the MCU is in stop3 mode by means of the hardware trigger or if continuous
conversions are enabled.
A conversion complete event sets the COCO and generates an ADC interrupt to wake the MCU from stop3
mode if the ADC interrupt is enabled (AIEN = 1).
9.4.8
The ADC module is automatically disabled when the MCU enters either stop2 mode. All module registers
contain their reset values following exit from stop2. Therefore, the module must be re-enabled and
re-configured following exit from stop2.
9.5
This section gives an example that provides some basic direction on how to initialize and configure the
ADC module. You can configure the module for 8-bit or 10-bit resolution, single or continuous conversion,
and a polled or interrupt approach, among many other options. Refer to
for information used in this example.
9.5.1
9.5.1.1
Before the ADC module can be used to complete conversions, an initialization procedure must be
performed. A typical sequence is as follows:
144
1. Update the configuration register (ADCCFG) to select the input clock source and the divide ratio
used to generate the internal clock, ADCK. This register is also used for selecting sample time and
low-power configuration.
Initialization Information
MCU Stop2 Mode Operation
ADC Module Initialization Example
Stop3 Mode With ADACK Enabled
Initialization Sequence
The ADC module can wake the system from low-power stop and cause the
MCU to begin consuming run-level currents without generating a system
level interrupt. To prevent this scenario, software should ensure the data
transfer blocking mechanism (discussed in
Conversions) is cleared when entering stop3 and continuing ADC
conversions.
Hexadecimal values designated by a preceding 0x, binary values designated
by a preceding %, and decimal values have no preceding character.
MC9S08SG32 Data Sheet, Rev. 8
NOTE
NOTE
Section 9.4.4.2, “Completing
Table
9-7,
Table
Freescale Semiconductor
9-8, and
Table 9-9