mc9s12xf512 Freescale Semiconductor, Inc, mc9s12xf512 Datasheet - Page 1047

• Manufacturer Part Number: mc9s12xf512
• Description: S12x Microcontrollers 16-bit Automotive Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

23.4.1
This module provides the capability of transmitting narrow pulses to an IR LED and receiving narrow
pulses and transforming them to serial bits, which are sent to the SCI. The IrDA physical layer
specification defines a half-duplex infrared communication link for exchange data. The full standard
includes data rates up to 16 Mbits/s. This design covers only data rates between 2.4 Kbits/s and 115.2
Kbits/s.
The infrared submodule consists of two major blocks: the transmit encoder and the receive decoder. The
SCI transmits serial bits of data which are encoded by the infrared submodule to transmit a narrow pulse
Freescale Semiconductor
SBR12:SBR0
Clock
RXD
Bus
Decoder
Infrared
Receive
Baud Rate
Generator
Infrared Interface Submodule
IREN
Ir_RXD
T8
R16XCLK
R32XCLK
÷16
SCRXD
TNP[1:0]
Shift Register
and Wakeup
Data Format
Transmit
Encoder
Infrared
SCI Data
Transmit
Transmit
Register
MC9S12XF - Family Reference Manual, Rev.1.19
Receive
Control
Control
Control
Figure 23-14. Detailed SCI Block Diagram
SCTXD
IREN
Shift Register
SCI Data
Ir_TXD
Receive
Register
LOOPS
LOOPS
RSRC
WAKE
RSRC
RWU
SBK
RE
ILT
PE
PT
TE
M
RXD
Chapter 23 Serial Communication Interface (S12SCIV5)
TDRE
RDRF
TCIE
TIE
IDLE
RAF
RIE
Break Detect
TC
LIN Transmit
BERRM[1:0]
OR
NF
Active Edge
R8
FE
PF
BKDFE
Collision
Detect
Detect
RXEDGIE
ILIE
BKDIE
BERRIF
RXEDGIF
BKDIF
BERRIE
TDRE
TC
TXD
IDLE
SCI
Interrupt
Request
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