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參數資料
| 型號： | HSDL-3220-021 |
| 廠商： | Avago Technologies Ltd. |
| 英文描述： | IrDA㈢ Data Compliant Low Power 4.0 Mbit/s Infrared Transceiver |
| 中文描述： | 紅外線㈢數據兼容低功耗4.0 Mbit / s的紅外收發器 |
| 文件頁數： | 3/19頁 |
| 文件大小： | 190K |
| 代理商： | HSDL-3220-021 |
3
Bandwidth Selection Timing
The transceiver is in default SIR/
MIR mode when powered on.
User needs to apply the following
programming sequence to both
the SD and TXD inputs to enable
the transceiver to operate at FIR
mode.
Setting the transceiver to SIR/MIR
Mode (9.6 kbit/s to 1.152 Mbit/s)
1. Set SD/Mode input to logic
HIGH
2. TXD input should remain at
logic LOW
3. After waiting for t
S
≥
25 ns, set
SD/Mode to logic LOW, the
HIGH to LOW negative edge
transition will determine the
receiver bandwidth
4. Ensure that TXD input re-
mains low for t
H
≥
100 ns, the
receiver is now in SIR/MIR
mode
5. SD input pulse width for mode
selection should be > 50 ns.
Setting the transceiver to FIR
(4.0 Mbit/s) Mode
1. Set SD/Mode input to logic
HIGH
V
IH
50%
t
S
t
H
V
IL
50%
50%
TXD
SD/MODE
V
IL
V
IH
50%
t
S
t
H
V
IL
50%
50%
TXD
SD/MODE
V
IH
V
IL
Figure 3. Bandwidth selection timing at SIR/MIR mode.
Figure 4. Bandwidth selection timing at FIR mode.
Transceiver I/O Truth Table
Inputs
Outputs
TXD
Light Input to Receiver
SD
LED
RXD
Note
High
Don’t Care
Low
On
Not Valid
Low
High
Low
Off
Low
12,13
Low
Low
Low
Off
High
Don’t Care
Don’t Care
High
Off
High
Notes:
12. In-band IrDA signals and data rates
≤
4.0 Mbit/s
13. RXD logic low is a pulsed response. The condition is maintained for a duration dependent on pattern and strength of the incident intensity.
2. After SD/Mode input remains
HIGH at > 25 ns, set TXD input
to logic HIGH, wait t
S
≥
25 ns
(from 50% of TXD rising edge
till 50% of SD falling edge)
3. Then set SD/Mode to logic
LOW, the HIGH to LOW
negative edge transition will
determine the receiver band-
width
4. After waiting for t
H
≥
100 ns,
set the TXD input to logic LOW
5. SD input pulse width mode
selection should be > 50 ns.
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相關代理商/技術參數 |
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|---|---|
| HSDL-3310 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:IrDA 1.3 Data Compliant 1.15Mb/s 3-5V Infrared Transceiver |
| HSDL-3310#007 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Telecomm/Datacomm |
| HSDL-3310#017 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Telecomm/Datacomm |
| HSDL-3600 | 制造商:AGILENT 制造商全稱:AGILENT 功能描述:IrDA Compliant 4 Mb/s 3 V Infrared Transceiver |
| HSDL-3600#007 | 制造商:Hewlett Packard Co 功能描述:SPECIALTY INTERFACE CIRCUIT, SMA10 |
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