MC9S12XDT256CAA Freescale Semiconductor, MC9S12XDT256CAA Datasheet - Page 1077

• Manufacturer Part Number: MC9S12XDT256CAA
• Description: IC MCU 256K FLASH 80-QFP
• Manufacturer: Freescale Semiconductor
• Series: HCS12r

Specifications of MC9S12XDT256CAA

• Core Processor: HCS12X
• Core Size: 16-Bit
• Speed: 80MHz
• Connectivity: CAN, EBI/EMI, I²C, IrDA, LIN, SCI, SPI
• Peripherals: LVD, POR, PWM, WDT
• Number Of I /o: 59
• 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): 2.35 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 80-QFP
• Processor Series: S12XD
• Core: HCS12
• Data Bus Width: 16 bit
• Data Ram Size: 16 KB
• Interface Type: CAN/I2C/SCI/SPI
• Maximum Clock Frequency: 40 MHz
• Number Of Programmable I/os: 59
• Number Of Timers: 12
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: EWHCS12
• Development Tools By Supplier: EVB9S12XDP512E
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 8-ch x 10-bit
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

All bits in the ECLKDIV register are readable, bits 6–0 are write once and bit 7 is not writable.
26.3.2.2
This register is reserved for factory testing and is not accessible.
All bits read 0 and are not writable.
26.3.2.3
This register is reserved for factory testing and is not accessible.
Freescale Semiconductor
EDIV[5:0]
EDIVLD
PRDIV8
Reset
Reset
Field
5–0
7
6
W
W
R
R
EDIVLD
Clock Divider Loaded
0 Register has not been written.
1 Register has been written to since the last reset.
0 The oscillator clock is directly fed into the ECLKDIV divider.
1 Enables a Prescalar by 8, to divide the oscillator clock before feeding into the clock divider.
Clock Divider Bits — The combination of PRDIV8 and EDIV[5:0] effectively divides the EEPROM module input
oscillator clock down to a frequency of 150 kHz – 200 kHz. The maximum divide ratio is 512. Please refer to
Section 26.4.1.1, “Writing the ECLKDIV Register”
Enable Prescalar by 8
RESERVED1
RESERVED2
0
0
0
7
7
= Unimplemented or Reserved
= Unimplemented or Reserved
PRDIV8
Figure 26-4. EEPROM Clock Divider Register (ECLKDIV)
0
0
0
6
6
Table 26-3. ECLKDIV Field Descriptions
MC9S12XDP512 Data Sheet, Rev. 2.21
EDIV5
0
0
0
5
5
Figure 26-5. RESERVED1
EDIV4
0
0
0
4
4
Description
for more information.
EDIV3
Chapter 26 4 Kbyte EEPROM Module (S12XEETX4KV2)
0
0
0
3
3
EDIV2
0
0
0
2
2
EDIV1
0
0
0
1
1
EDIV0
0
0
0
0
0
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