MC9S12XET256CAG Freescale Semiconductor, MC9S12XET256CAG Datasheet - Page 517

• Manufacturer Part Number: MC9S12XET256CAG
• Description: MCU 16BIT 256K FLASH 144-LQFP
• Manufacturer: Freescale Semiconductor
• Series: HCS12r

Specifications of MC9S12XET256CAG

• Core Processor: HCS12X
• Core Size: 16-Bit
• Speed: 50MHz
• Connectivity: CAN, EBI/EMI, I²C, IrDA, SCI, SPI
• Peripherals: LVD, POR, PWM, WDT
• Number Of I /o: 119
• Program Memory Size: 256KB (256K x 8)
• Program Memory Type: FLASH
• Eeprom Size: 4K x 8
• Ram Size: 16K x 8
• Voltage - Supply (vcc/vdd): 1.72 V ~ 5.5 V
• Data Converters: A/D 24x12b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 144-LQFP
• Processor Series: S12XE
• Core: HCS12
• 3rd Party Development Tools: EWHCS12
• Development Tools By Supplier: KIT33812ECUEVME, EVB9S12XEP100, DEMO9S12XEP100
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

13.3.2.6
Writes to this register will abort current conversion sequence and start a new conversion sequence. If
external trigger is enabled (ETRIGE=1) an initial write to ATDCTL5 is required to allow starting of a
conversion sequence which will then occur on each trigger event. Start of conversion means the beginning
of the sampling phase.
Read: Anytime
Write: Anytime
Freescale Semiconductor
Module Base + 0x0005
Because of an order from the United States International Trade Commission, BGA-packaged product lines and partnumbers
SMP[2:0]
PRS[4:0]
Reset
indicated here currently are not available from Freescale for import or sale in the United States prior to September 2010
Field
7–5
4–0
W
R
Sample Time Select — These three bits select the length of the sample time in units of ATD conversion clock
cycles. Note that the ATD conversion clock period is itself a function of the prescaler value (bits PRS4-0).
Table 13-14
ATD Clock Prescaler — These 5 bits are the binary prescaler value PRS. The ATD conversion clock frequency
is calculated as follows:
Refer to Device Specification for allowed frequency range of f
ATD Control Register 5 (ATDCTL5)
0
0
7
lists the available sample time lengths.
f ATDCLK
SMP2
SC
0
6
0
0
0
0
1
1
1
1
Figure 13-8. ATD Control Register 5 (ATDCTL5)
MC9S12XE-Family Reference Manual Rev. 1.23
Table 13-13. ATDCTL4 Field Descriptions
=
------------------------------------ -
2
SMP1
SCAN
×
Table 13-14. Sample Time Select
(
0
0
1
1
0
0
1
1
5
0
f BUS
PRS
+
1
)
SMP0
MULT
0
1
0
1
0
1
0
1
0
4
Description
ATD Clock Cycles
Chapter 13 Analog-to-Digital Converter (ADC12B16CV1)
CD
0
3
Sample Time
in Number of
ATDCLK
10
12
16
20
24
4
6
8
.
CC
2
0
CB
0
1
CA
0
0
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