S912XET512J3VALR Freescale Semiconductor, S912XET512J3VALR Datasheet - Page 748
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S912XET512J3VALR
Manufacturer Part Number
S912XET512J3VALR
Description
16-bit Microcontrollers - MCU 16 BIT,512K FLASH
Manufacturer
Freescale Semiconductor
Datasheet
1.S912XEG128J2MAL.pdf
(1324 pages)
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
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
S912XET512J3VALR
Manufacturer:
Freescale Semiconductor
Quantity:
10 000
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Chapter 20 Serial Communication Interface (S12SCIV5)
20.4.6
20.4.6.1
The SCI receiver can accommodate either 8-bit or 9-bit data characters. The state of the M bit in SCI
control register 1 (SCICR1) determines the length of data characters. When receiving 9-bit data, bit R8 in
SCI data register high (SCIDRH) is the ninth bit (bit 8).
20.4.6.2
During an SCI reception, the receive shift register shifts a frame in from the RXD pin. The SCI data register
is the read-only buffer between the internal data bus and the receive shift register.
After a complete frame shifts into the receive shift register, the data portion of the frame transfers to the
SCI data register. The receive data register full flag, RDRF, in SCI status register 1 (SCISR1) becomes set,
748
From TXD Pin
or Transmitter
SCRXD
LOOPS
RSRC
Receiver
Receiver Character Length
Character Reception
RXPOL
Control
SBR12:SBR0
Loop
Clock
Bus
Baud Divider
MC9S12XE-Family Reference Manual Rev. 1.25
Figure 20-20. SCI Receiver Block Diagram
WAKE
RAF
RE
ILT
PE
PT
M
Recovery
Detect Logic
Data
Detect Logic
Active Edge
Break
BRKDFE
Checking
Wakeup
Parity
Logic
Internal Bus
H
RXEDGIE
RXEDGIF
BRKDIF
BRKDIE
8
RDRF
11-Bit Receive Shift Register
7
OR
SCI Data Register
6
5
4
FE
NF
PE
3
R8
IDLE
Freescale Semiconductor
ILIE
RIE
2
Break IRQ
RX Active Edge IRQ
1
0
L
RWU
RDRF/OR
Idle IRQ
IRQ
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