hsdl-3210 Avago Technologies, hsdl-3210 Datasheet - Page 16

• Manufacturer Part Number: hsdl-3210
• Description: Irda Compliant Low Power 1.15 Mbit/s Infrared Transceiver - Agilent Hewlett-packard
• Manufacturer: Avago Technologies

The link distance testing was done using typical HSDL-3210 units with National
Semiconductor’s PC87109 3V Super I/O controller and SMC’s FDC37C669 and
FDC37N769 Super I/O controllers. An IR link distance of up to 40 cm was demon-
strated for SIR at full power. On the other hand, for MIR at full power, an IR link
distance of up to 35 cm was demonstrated.
Serial Interface Transceiver Control
(STC)
HSDL-3210 supports the serial
interface for transceiver control
specification that provides a
common interface between the
transceiver and controller.
STC comprises a 3-wire interface:
TXD/SWDAT, RXD/ARDAT and
SCLK. This 3-wire interface
abolishes the use of different
modes and logic pins of existing
transceivers. Instead registers on
board the transceiver store
Figure 19. STC block diagram.
1 6
INFRARED CONTROLLER
INFRARED CONTROLLER
(MASTER)
(MASTER)
STC – COMMAND / RESPONSE MODE
STC – NORMAL MODE
operating modes and states, thus
electrical interface can be
standardized across different
vendors and transceivers.
The diagram below shows the
STC I/O between the transceiver
and the IrDA controller.
In normal operation, the TXD and
RXD carry IR transmit and
receive signals. In STC mode,
SWDAT and SRDAT carry
command and responses to and
from the transceiver respectively.
(CLOCK COMMAND / RESPONSE)
(SEND RESPONSES)
(WRITE COMMAND)
SWDAT
SRDAT
SCLK
SCLK
RXD
TXD
TRANSCEIVER (SLAVE)
TRANSCEIVER (SLAVE)
Activity on the SCLK line
determines whether the trans-
ceiver is to operate in the normal
or STC mode.
Please refer to Agilent
Application Note 1270 Serial
Transceiver Control for Infrared
Transceivers for further
information on implementing STC
using HSDL-3210 as well as the
lists of registers supported by
HSDL-3210.