IRC 1802
IrDA Communications Controller
for SIR, MIR, FIR and VFIR
Features
Synchronous MACRO Bus Interface
Synchronous Bus boundary
Tx Bus Mastering
and 16 x 8 FIFO
Register
access logic
Rx Bus Mastering
and 16 x 8 FIFO
s
IrDA 1.x, HP-SIR, and Sharp ASK
compliant
s
Supports all IrDA data rates up to Very
Fast IR (VFIR), 16 Mb/s
s
High performance hardware based IrDA
SIR Link Access Protocol (IrLAP)
s
Host Direct Memory Access (DMA) and
Shared Memory modes
CRC
Chk
Synchronous Ł
8 MHz Boundary
Tx Frame
Controller
Rx Frame
Controller
Tx and Rx
Regs
CRC
Gen
Rx Data Interface
s
Burst packet transmission and recep-
tion for all data rates
s
Hardware transceiver Serial Interface
(SIF) programming
SIR
Tx
Cntl
MIR
Tx
Cntl
VFIR
Tx
Cntl
FIR
Tx
Cntl
FIR
Rx
Cntl
VFIR
Rx
Cntl
MIR
Rx
Cntl
SIR
Rx
Cntl
s
Direct interface connection to all
vendors Infrared Transceiver modules
s
Support for dual channel transceivers
HP /
Sharp
Mod
MIR
Mod
VFIR
Mod
FIR
Dem
FIR
Dem
VFIR
Dem
MIR
Dem
HP /
Sharp
Dem
s
General purpose I/O pins for external
device control
s
ISA Plug and Play (PnP) and PCMCIA
bus interface
s
Single 48 or 96 MHz external clock
input
s
3.3 V supply voltage
Single / Dual Channel Transceiver Interface
Tx
SD / CLK
VFIR FIR Rx
SIR Rx
s
Small 100-pin Thin Quad Flat Pack
(TQFP) package
IRC 1802 BLOCK DIAGRAM
The IRC1802 is a low-cost, highly inte-
grated SIR, MIR, FIR and Very Fast Infrared
(VFIR) communications
controller capable of supporting IrDA 1.x
infrared modulation schemes including HP-
SIR and Sharp ASK. The IrDA 1.x low and
high-speed communication modes support
all speeds up to 16 Mb/s (VFIR). All
speeds can use Direct Memory Access.
The same drivers are used for all speeds
for receiving and transmitting, simplifying
driver programming and speed upgrades.
Typical applications include data transfer
in notebook computers, desktops comput-
ers, printers, access-points, digital cameras
and peer-peer or client-server network
environments.
The Host Interface module connects to an
ISA bus or PCMCIA bus. It contains the
bus interface logic, system configuration
registers, power management circuitry, and
local DMA control functions. The IRC1802
supports two modes of block data
transfer: Host DMA and Shared Memory
Buffer. In Host DMA mode, data is
transferred using the host system’s DMA
controller. In Shared Memory mode, data
is first buffered in local RAM, then read by
the host during receive-mode or shifted
out to the infrared link during transmit-
mode.
s
Shared Memory and Host DMA modes
Shared Memory mode is a Local DMA
mode with 32 Kbytes SRAM locally.
In this mode, both the controller and
host have access to a shared block of
memory to which data can be read or
written. During packet transmitting or
receiving there is no data transfer on
the system bus.
For packet sending, the host copies the
packet to the Tx buffer of shared
memory, initializes the Transmit
Request and waits for the End of
Transmit, EOTR, condition to generate
an interrupt.
For packet receiving, the host waits for
the End of Receive, EOR, interrupt
condition and copies packets received
from the Rx buffer of shared memory.
The programming is simple and the
operation is fast.
s
Burst packet transmission and recep-
tion support for all data rates
Burst
data transfer consisting of multiple IrDA
frames are accomplished by adding
control headers to the desired outgoing
data frames and arranging them
sequentially in the transmit buffer of
the host’s or local shared memory.
The Tx and Rx Frame Control Modules
control transmit and receive functions.
The 32 Kbytes shared memory can
keep seven IrDA frames with size of
2048 bytes.
s
Direct Interface to both Legacy
and Digital Serial Interface (SIF)
Transceivers
The Serial Interface (SIF) module allows
the controller to interface directly to
Infineon’s IRM1600
transceiver.
This transceiver supports new features
like speed mode select (VFIR), pro-
grammable modulation setting, LED
power control, receiver sensitivity and
power management.
Architecture
The IRC1802 Infrared Communications
Controller consists of an Infrared Core
module and a Host Interface module (see
IRC 1802 Block Diagram).
The Infrared Core module controls all
infrared communication functions. It is
divided into four subsystems: SIR, MIR,
FIR and Very Fast Infrared (VFIR). Each
subsystem consists of a controller and a
modem.
The SIR subsystem improves on the
popular 16550 UART scheme by combining
a high performance DMA asynchronous
receiver-transmitter with the hardware Link
Access Protocol (IrLAP) for a complete
hardware SIR packet transfer.
.116
(2.95)
E
C
L
.106
(2.70)
D
.190
(4.83)
Pin 1
.138
(3.50)
.374 (9.86)
.157
(4.00)
E
E=Emitter
D=Detector
D
Dimensions in inches (mm)
IRMS1600
SIDE VIEW
Preliminary Product Description
A B S O LU T E M A X I M U M R AT I N G S
SYMBOL PARAMETER
MIN TYPICAL
MAX
UNIT
CONDITIONS
16Mb/s
Infrared Data Transceiver
Infineon Technologies transceiver for VFIR
16 Mb/sec is pin compatible with our
Slimline series of IrDT transceivers.
Available in side view only, it is part of
the only complete VFIR solution available
on the market. The device combines an
LED, photodiode, and VFIR ASIC. The
ASIC has been designed to support VFIR,
FIR, MIR, SIR, and ASK modes. It is ideal
for Notebook, Desktop, Printer and Digital
Video applications.
V
CC
PD
T
S
I
LED
TxD
Supply Voltage
Power Dissipation Average
Storage Temperature
LED Current (Peak)
Transmission Input Voltage
-0.5
-40
-0.5
5.5
550
100
450
V
CC
+0.3
V
mW
°C
mA
V
R E C O M M E N D E D O P E R AT I N G C O N D I T I O N S
SYMBOL PARAMETER
MIN TYPICAL MAX
UNIT
CONDITIONS
V
CC
T
A
Supply Voltage
3.0
Ambient Operating Temperature -25
3.3
3.6
75
V
°C
DC ELECTRICAL CHARACTERISTICS
SYMBOL PARAMETER
MIN TYPICAL
MAX
UNIT
CONDITIONS
I
CC
I
CC
I
SD
I
LED
Supply Current; Standby
Supply Current; Receiving
Supply Current, Shutdown
LED Current
3
7
3.0
25
50
100
mA
mA
nA
mA
Standby VFIR receive
Interface and optical
input power dependent
IRMS1600 Pin Functions
PIN # FUNCTION
1
2
3
4
LED Anode
LED Cathode
TxD
RxD
PIN # FUNCTION
5
6
7
8
SD/SCLK
V
CC
*Do Not Connect
GND
RECEIVER PARAMETER
SYMBOL PARAMETER
MIN TYPICAL
MAX
UNIT
CONDITIONS
*Pin 7 internally grounded
Features
s
s
s
s
s
s
Compliant with IrDA Specification
Data Rates 9.6Kb/s to 16Mb/s
Supply Voltage 2.5V to 5.5V
Standby Current 3.0mA(max)
Shut Down Current 50nA(max)
Slimline Package
H 4.0mm x D 4.8mm x L 9.8mm
s
Digital Serial Interface
E
MIN
E
MIN
E
MIN
E
MIN
tr,tf
tr,tf
Detection Irradiance SIR
Detection Irradiance MIR
Detection Irradiance FIR
Detection Irradiance VFIR
Receiver Rise/Fall Time
Receiver Rise/Fall Time
3
3
4
5
-
-
-
-
-
-
-
-
20
50
µW/cm
2
µW/cm
2
µW/cm
2
µW/cm
2
ns
VFIR Mode
ns
SIR, MIR, FIR Mode
TRANSMITTER PARAMETER
SYMBOL PARAMETER
MIN TYPICAL
MAX
UNIT
CONDITIONS
λ
P
α
Ie
Input Capacitance
850
Radiant Angle at Half Intensity -15
Output Radiant Intensity
85
870
+15
170
900
°
275
nm
MW/sr TxD=High, SD=Low,
V
CC
=3.0V,
α=
0° and 15°,
TA=25 C, 25% duty
For samples, www.infineon.com/irdt
© Infineon Technologies Corp. 2000
All Rights Reserved
USA (California)
Syed Naqvi
408-456-4092
syed.naqvi@infineon.com
Europe (Germany)
Walter Rothmund
49-941-202-1703
walter.rothmund@osram-os.com
Japan (Tokyo)
Hiromichi Kamijima
81-3-5449-6715
hiromichi.kamijima@infineon.com
Asia Pacific (Singapore)
King Soon Lim
65-8400-832
king-soon.lim@infineon.com