HSDL-3003-021 查看數據表（PDF） - Avago Technologies

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HSDL-3003-021

IrDA® Data Compliant Low Power 115.2 kbit/s with Remote Control Infrared Transceiver

Avago Technologies 

Different Remote Control

Configurations for HSDL-3003

The HSDL-3003 can operate in

the single-TXD programmable

mode or the two-TXD direct

transmission mode.

Single-TXD Programmable

Mode

In the single-TXD programmable

mode, only one input pin

(TxD_IrDA input pin) is used to

turn on either the 875 nm LED or

the 940 nm LEDs while the

TxD_RC input pin is grounded.

The transceiver is in default mode

(IrDA) when powered up. User

needs to apply the following

programming sequence to both

the TxD_IrDA and SD inputs to

enable the transceiver to operate

in either the IrDA or remote

control mode.

tC

tTL

tA tB

SHUTDOWN

(ACTIVE HIGH)

TxD_IrDA

(ACTIVE HIGH)

•••

SHUTDOWN

TxD_RC

(GND)

DRIVE

RC

IrDA LED MODE

Figure 2.

tC

•••

•••

DRIVE

RC LED

RESET

DRIVE

IrDA LED

Two-TXD Direct

Transmission Mode

In the two-TXD direct

transmission mode, the 875 nm

LED and the 940 nm LEDs are

turned on separately by two

different input pins. The

TxD_IrDA input pin is used to

turn on the 875 nm LED while

the TxD_RC input pin is used to

turn on the 940 nm LEDs.

Please refer to the Transceiver

I/O truth table for more details.

Transceiver Control I/O Truth Table for Two-TXD Direct

Transmission Mode

SD TXD_IrDA TXD_RC IrDA LED RC LEDs Remarks

00

0

OFF

OFF

IR Rx enabled. Idle mode

00

1

OFF

ON

Remote control operation

01

0

ON

OFF

IrDA Tx operation

01

1

DIM

ON

Not recommended

10

0

OFF

OFF

Shutdown mode*

* The shutdown condition will set the transceiver to the default mode (IrDA).

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