S912XET256J2VAGR Freescale Semiconductor, S912XET256J2VAGR Datasheet - Page 752
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S912XET256J2VAGR
Manufacturer Part Number
S912XET256J2VAGR
Description
16-bit Microcontrollers - MCU Watchdog OSC/Timer -40 C to + 105 C HCS12X MCU SPI
Manufacturer
Freescale Semiconductor
Datasheet
1.S912XEQ512J3CAGR.pdf
(1324 pages)
Specifications of S912XET256J2VAGR
Core
HCS12X
Data Bus Width
16 bit
Maximum Clock Frequency
50 MHz
Program Memory Size
256 KB
Data Ram Size
16 KB
On-chip Adc
Yes
Package / Case
LQFP
Mounting Style
SMD/SMT
A/d Bit Size
12 bit
A/d Channels Available
24
Interface Type
CAN, SCI, SPI
Maximum Operating Temperature
+ 105 C
Minimum Operating Temperature
- 40 C
Number Of Programmable I/os
119
Number Of Timers
25
Program Memory Type
Flash
Supply Voltage - Max
1.98 V, 2.9 V, 5.5 V
Supply Voltage - Min
1.72 V, 2.7 V, 3.13 V
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Chapter 20 Serial Communication Interface (S12SCIV5)
In
at RT5 is high. The RT5 sample sets the noise flag. Although this is a worst-case misalignment of perceived
bit time, the data samples RT8, RT9, and RT10 are within the bit time and data recovery is successful.
Figure 20-25
synchronization with the start bit time, it does set the noise flag.
752
Figure
RT Clock Count
Reset RT Clock
RT Clock Count
Reset RT Clock
RT Clock
RT Clock
Samples
Samples
20-24, a large burst of noise is perceived as the beginning of a start bit, although the test sample
RXD
RXD
shows the effect of noise early in the start bit time. Although this noise does not affect proper
1
1
1
1
1
1
1
0
1
MC9S12XE-Family Reference Manual Rev. 1.25
Figure 20-24. Start Bit Search Example 3
Figure 20-25. Start Bit Search Example 4
1
0
1
1
1
1
Perceived Start Bit
0
0
0
1
0
0
Perceived and Actual Start Bit
0
Actual Start Bit
Freescale Semiconductor
LSB
LSB
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