MC9S12E32CFU FREESCALE [Freescale Semiconductor, Inc], MC9S12E32CFU Datasheet - Page 258
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MC9S12E32CFU
Manufacturer Part Number
MC9S12E32CFU
Description
HCS12 Microcontrollers
Manufacturer
FREESCALE [Freescale Semiconductor, Inc]
Datasheet
1.MC9S12E32CFU.pdf
(606 pages)
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Chapter 8 Serial Communication Interface (SCIV3)
8.4
This subsection provides a complete functional description of the SCI block, detailing the operation of the
design from the end user’s perspective in a number of descriptions.
Figure 8-11
communication between the CPU and remote devices, including other CPUs. The SCI transmitter and
receiver operate independently, although they use the same baud rate generator. The CPU monitors the
status of the SCI, writes the data to be transmitted, and processes received data.
258
CLOCK
SBR12–SBR0
BUS
RXD
Functional Description
INFRARED
DECODER
RECEIVE
shows the structure of the SCI module. The SCI allows full duplex, asynchronous, serial
GENERATOR
BAUD RATE
IREN
Ir_RXD
T8
R32XCLK
R16XCLK
16
SHIFT REGISTER
SCRXD
DATA FORMAT
AND WAKEUP
TRANSMIT
TRANSMIT
REGISTER
CONTROL
CONTROL
CONTROL
SCI DATA
RECEIVE
Figure 8-11. Detailed SCI Block Diagram
MC9S12E128 Data Sheet, Rev. 1.07
SHIFT REGISTER
REGISTER
SCI DATA
RECEIVE
LOOPS
LOOPS
WAKE
RSRC
RSRC
RWU
SBK
ILT
RE
PE
PT
TE
M
SCTXD
TDRE
TCIE
RDRF
IDLE
TIE
RAF
RIE
TC
OR
R8
NF
FE
PF
TNP[1:0]
INFRARED
TRANSMIT
ENCODER
ILIE
IREN
TDRE
Ir_TXD
TC
IDLE
Freescale Semiconductor
SCI
Interrupt
Request
TXD
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