S912XET512J3VALR Freescale Semiconductor, S912XET512J3VALR Datasheet - Page 490

• 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

Chapter 11 S12XE Clocks and Reset Generator (S12XECRGV1)
The Sequence for clock quality check is shown in
1. A Clock Monitor Reset will always set the SCME bit to logical’1’.
490
POR
LVR
Remember that in parallel to additional actions caused by Self Clock Mode
or Clock Monitor Reset
check the OSCCLK signal.
The Clock Quality Checker enables the IPLL and the voltage regulator
(VREG) anytime a clock check has to be performed. An ongoing clock
quality check could also cause a running IPLL (f
during Pseudo Stop Mode.
CHECK WINDOW
CLOCK OK
OSC OK
ACTIVE?
NUM = 50
SCM
?
YES
NO
FSTWKP=1
SCME=1 &
NO
?
EXIT FULL STOP
NO
YES
Figure 11-18. Sequence for Clock Quality Check
CM FAIL
MC9S12XE-Family Reference Manual Rev. 1.25
YES
1
SWITCH TO OSCCLK
handling the clock quality checker continues to
NUM = NUM-1
NUM = 0
EXIT SCM
NUM > 0
?
YES
NOTE
NOTE
Figure
NO
CLOCK MONITOR RESET
11-18.
ENTER SCM
ENTER SCM
YES
SCM
) and an active VREG
SCME = 1
ACTIVE?
SCM
?
NO
YES
FSTWKP = 0
NO
YES
?
Freescale Semiconductor
NO
NUM = 0