S912XET512J3VALR Freescale Semiconductor, S912XET512J3VALR Datasheet - Page 1239

• Manufacturer Part Number: S912XET512J3VALR
• Description: 16-bit Microcontrollers - MCU 16 BIT,512K FLASH
• Manufacturer: Freescale Semiconductor

Specifications of S912XET512J3VALR

• Rohs: yes
• Core: HCS12X
• Processor Series: MC9S12XE
• Data Bus Width: 16 bit
• Maximum Clock Frequency: 50 MHz
• Program Memory Size: 512 KB
• Data Ram Size: 32 KB
• On-chip Adc: Yes
• Operating Supply Voltage: 3.13 V to 5.5 V
• Operating Temperature Range: - 40 C to + 105 C
• Package / Case: LQFP-112
• Mounting Style: SMD/SMT

Appendix A Electrical Characteristics
A.6.3
Phase Locked Loop
A.6.3.1
Jitter Information
With each transition of the clock f
, the deviation from the reference clock f
is measured and input
cmp
ref
voltage to the VCO is adjusted accordingly.The adjustment is done continuously with no abrupt changes
in the clock output frequency. Noise, voltage, temperature and other factors cause slight variations in the
control loop resulting in a clock jitter. This jitter affects the real minimum and maximum clock periods as
illustrated in
Figure
A-5.
1
2
3
N-1
N
0
t
min1
t
nom
t
max1
t
minN
t
maxN
Figure A-5. Jitter Definitions
The relative deviation of t
is at its maximum for one clock period, and decreases towards zero for larger
nom
number of clock periods (N).
MC9S12XE-Family Reference Manual Rev. 1.25
Freescale Semiconductor
1239