MC9S12G FREESCALE [Freescale Semiconductor, Inc], MC9S12G Datasheet - Page 580

• Manufacturer Part Number: MC9S12G
• Description: Ignores external trigger. Performs one conversion sequence and stops.
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

Serial Communication Interface (S12SCIV5)
18.4.1
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
580
SBR12:SBR0
Clock
RXD
Bus
This document is valid for the S12G96 and the S12G128 device. All information related to other devices is preliminary.
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
Receive
Control
Control
Control
Figure 18-14. Detailed SCI Block Diagram
MC9S12G Family Reference Manual,
SCTXD
Shift Register
IREN
SCI Data
Receive
Ir_TXD
Register
LOOPS
LOOPS
RSRC
WAKE
RSRC
RWU
SBK
RE
ILT
PE
PT
TE
M
RXD
TDRE
RDRF
TCIE
TIE
IDLE
RAF
RIE
Break Detect
LIN Transmit
BERRM[1:0]
OR
TC
Active Edge
R8
NF
FE
PF
BKDFE
Collision
Detect
Detect
Rev.1.01
RXEDGIE
ILIE
BKDIE
BERRIF
RXEDGIF
BKDIF
BERRIE
TDRE
TC
TXD
Freescale Semiconductor
IDLE
SCI
Interrupt
Request