MC9S12XD256VAG Freescale Semiconductor, MC9S12XD256VAG Datasheet - Page 102
MC9S12XD256VAG
Manufacturer Part Number
MC9S12XD256VAG
Description
IC MCU 256K FLASH 144-LQFP
Manufacturer
Freescale Semiconductor
Series
HCS12r
Datasheet
1.MC9S12XD64CAA.pdf
(1348 pages)
Specifications of MC9S12XD256VAG
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
119
Program Memory Size
256KB (256K x 8)
Program Memory Type
FLASH
Eeprom Size
4K x 8
Ram Size
14K x 8
Voltage - Supply (vcc/vdd)
2.35 V ~ 5.5 V
Data Converters
A/D 24x10b
Oscillator Type
External
Operating Temperature
-40°C ~ 105°C
Package / Case
144-LQFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
MC9S12XD256VAG
Manufacturer:
FREESCAL
Quantity:
246
Company:
Part Number:
MC9S12XD256VAG
Manufacturer:
Freescale Semiconductor
Quantity:
10 000
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Chapter 2 Clocks and Reset Generator (S12CRGV6)
A number greater equal than 4096 rising OSCCLK edges within a check window is called osc ok. Note that
osc ok immediately terminates the current check window. See
The sequence for clock quality check is shown in
102
POR
LVR
check window
Clock OK
num = 50
OSCCLK
active?
osc ok
SCM
?
Clock
yes
no
VCO
FSTWKP = 1
SCME = 1 &
no
?
exit full stop
no
yes
Figure 2-20. Sequence for Clock Quality Check
CM fail
1
1
Figure 2-19. Check Window Example
yes
MC9S12XDP512 Data Sheet, Rev. 2.21
2
2
Switch to OSCCLK
3
num = 0
num=num–1
Exit SCM
num > 0
4
3
?
yes
5
check window
Figure
4095
no
4096
2-20.
Clock Monitor Reset
Enter SCM
Enter SCM
osc ok
Figure 2-19
yes
49999
SCME=1
active?
SCM
as an example.
?
no
yes
FSTWKP = 0
no
yes
50000
?
Freescale Semiconductor
no
num = 0
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