MC9S12XET256MAL Freescale Semiconductor, MC9S12XET256MAL Datasheet - Page 924
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MC9S12XET256MAL
Manufacturer Part Number
MC9S12XET256MAL
Description
MCU 16BIT 256K FLASH 112-LQFP
Manufacturer
Freescale Semiconductor
Series
HCS12r
Datasheet
1.MC9S12XEP768CAL.pdf
(1328 pages)
Specifications of MC9S12XET256MAL
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
91
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 12x12b
Oscillator Type
External
Operating Temperature
-40°C ~ 125°C
Package / Case
112-LQFP
Cpu Family
HCS12X
Device Core Size
16b
Frequency (max)
50MHz
Interface Type
CAN/SCI/SPI
Total Internal Ram Size
16KB
# I/os (max)
91
Number Of Timers - General Purpose
25
Operating Supply Voltage (typ)
1.8/2.8/5V
Operating Supply Voltage (max)
1.98/2.9/5.5V
Operating Supply Voltage (min)
1.72/2.7/3.13V
On-chip Adc
16-chx12-bit
Instruction Set Architecture
RISC
Operating Temp Range
-40C to 125C
Operating Temperature Classification
Automotive
Mounting
Surface Mount
Pin Count
112
Package Type
LQFP
No. Of I/o's
91
Eeprom Memory Size
4KB
Ram Memory Size
16KB
Cpu Speed
50MHz
No. Of Timers
3
No. Of Pwm Channels
8
Digital Ic Case Style
LQFP
Rohs Compliant
Yes
Processor Series
S12XE
Core
HCS12
Data Bus Width
16 bit
Data Ram Size
16 KB
Maximum Clock Frequency
50 MHz
Number Of Programmable I/os
91
Number Of Timers
25
Maximum Operating Temperature
+ 125 C
Mounting Style
SMD/SMT
3rd Party Development Tools
EWHCS12
Development Tools By Supplier
KIT33812ECUEVME, EVB9S12XEP100, DEMO9S12XEP100
Minimum Operating Temperature
- 40 C
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
MC9S12XET256MAL
Manufacturer:
Freescale Semiconductor
Quantity:
10 000
Part Number:
MC9S12XET256MAL
Manufacturer:
FREESCALE
Quantity:
20 000
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Chapter 25 256 KByte Flash Module (S12XFTM256K2V1)
25.4
25.4.1
Flash command operations are used to modify Flash memory contents or configure module resources for
EEE operation.
The next sections describe:
25.4.1.1
Prior to issuing any Flash program or erase command after a reset, the user is required to write the
FCLKDIV register to divide OSCCLK down to a target FCLK of 1 MHz.
values for the FDIV field based on OSCCLK frequency.
When the FCLKDIV register is written, the FDIVLD bit is set automatically. If the FDIVLD bit is 0, the
FCLKDIV register has not been written since the last reset. If the FCLKDIV register has not been written,
any Flash program or erase command loaded during a command write sequence will not execute and the
ACCERR bit in the FSTAT register will set.
25.4.1.2
The Memory Controller will launch all valid Flash commands entered using a command write sequence.
Before launching a command, the ACCERR and FPVIOL bits in the FSTAT register must be clear (see
Section
sequence. If CCIF is 0, the previous command write sequence is still active, a new command write
sequence cannot be started, and all writes to the FCCOB register are ignored.
924
•
•
•
How to write the FCLKDIV register that is used to generate a time base (FCLK) derived from
OSCCLK for Flash program and erase command operations
The command write sequence used to set Flash command parameters and launch execution
Valid Flash commands available for execution
25.3.2.7) and the CCIF flag should be tested to determine the status of the current command write
Functional Description
Flash Command Operations
Writing the FCLKDIV Register
Command Write Sequence
Programming or erasing the Flash memory cannot be performed if the bus
clock runs at less than 1 MHz. Setting FDIV too high can destroy the Flash
memory due to overstress. Setting FDIV too low can result in incomplete
programming or erasure of the Flash memory cells.
Writes to any Flash register must be avoided while a Flash command is
active (CCIF=0) to prevent corruption of Flash register contents and
Memory Controller behavior.
MC9S12XE-Family Reference Manual , Rev. 1.23
CAUTION
NOTE
Table 25-9
shows recommended
Freescale Semiconductor
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