MC9S08JM32CGT Freescale Semiconductor, MC9S08JM32CGT Datasheet - Page 155
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MC9S08JM32CGT
Manufacturer Part Number
MC9S08JM32CGT
Description
IC MCU 8BIT 32K FLASH 48-QFN
Manufacturer
Freescale Semiconductor
Series
HCS08r
Datasheet
1.MC9S08JM32CLD.pdf
(388 pages)
Specifications of MC9S08JM32CGT
Core Processor
HCS08
Core Size
8-Bit
Speed
48MHz
Connectivity
I²C, LIN, SCI, SPI, USB
Peripherals
LVD, POR, PWM, WDT
Number Of I /o
37
Program Memory Size
32KB (32K x 8)
Program Memory Type
FLASH
Ram Size
2K x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 5.5 V
Data Converters
A/D 8x12b
Oscillator Type
External
Operating Temperature
-40°C ~ 85°C
Package / Case
48-QFN
Processor Series
S08JM
Core
HCS08
Data Bus Width
8 bit
Data Ram Size
2 KB
Interface Type
SCI/SPI
Maximum Clock Frequency
24 MHz
Number Of Programmable I/os
37
Number Of Timers
8
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
3rd Party Development Tools
EWS08
Development Tools By Supplier
DEMOJM, DEMOJMSKT, DEMOFLEXISJMSD, DEMO9S08JM16
Minimum Operating Temperature
- 40 C
On-chip Adc
8-ch x 12-bit
Controller Family/series
HCS08
No. Of I/o's
37
Ram Memory Size
2KB
Cpu Speed
48MHz
No. Of Timers
2
Rohs Compliant
Yes
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
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10.5.1
10.5.1.1
Before the ADC module can be used to complete conversions, an initialization procedure must be
performed. A typical sequence is as follows:
10.5.1.2
In this example, the ADC module is set up with interrupts enabled to perform a single 10-bit conversion
at low power with a long sample time on input channel 1, where the internal ADCK clock is derived from
the bus clock divided by 1.
ADCCFG = 0x98 (%10011000)
ADCSC2 = 0x00 (%00000000)
ADCSC1 = 0x41 (%01000001)
ADCRH/L = 0xxx
Freescale Semiconductor
1. Update the configuration register (ADCCFG) to select the input clock source and the divide ratio
2. Update status and control register 2 (ADCSC2) to select the conversion trigger (hardware or
3. Update status and control register 1 (ADCSC1) to select whether conversions will be continuous
used to generate the internal clock, ADCK. This register is also used for selecting sample time and
low-power configuration.
software) and compare function options, if enabled.
or completed only once, and to enable or disable conversion complete interrupts. The input channel
on which conversions will be performed is also selected here.
Bit 7
Bit 6:5 ADIV
Bit 4
Bit 3:2 MODE
Bit 1:0 ADICLK
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3:2
Bit 1:0
Bit 7
Bit 6
Bit 5
Bit 4:0 ADCH
Holds results of conversion. Read high byte (ADCRH) before low byte (ADCRL) so that
conversion data cannot be overwritten with data from the next conversion.
ADC Module Initialization Example
Initialization Sequence
Pseudo-Code Example
Hexadecimal values designated by a preceding 0x, binary values designated
by a preceding %, and decimal values have no preceding character.
ADLPC
ADLSMP
ADACT
ADTRG
ACFE
ACFGT
COCO
AIEN
ADCO
1
00
1
10
00
0
0
0
0
00
00
0
1
0
00001
MC9S08JM60 Series Data Sheet, Rev. 3
Configures for low power (lowers maximum clock speed)
Sets the ADCK to the input clock ÷ 1
Configures for long sample time
Sets mode at 10-bit conversions
Selects bus clock as input clock source
Flag indicates if a conversion is in progress
Software trigger selected
Compare function disabled
Not used in this example
Reserved, always reads zero
Reserved for Freescale’s internal use; always write zero
Read-only flag which is set when a conversion completes
Conversion complete interrupt enabled
One conversion only (continuous conversions disabled)
Input channel 1 selected as ADC input channel
NOTE
Analog-to-Digital Converter (S08ADC12V1)
155
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