xr16v654 Exar Corporation, xr16v654 Datasheet - Page 23
![no-image](/images/manufacturer_photos/0/2/243/exar_corporation_sml.jpg)
xr16v654
Manufacturer Part Number
xr16v654
Description
2.25v To 3.6v Quad Uart With 64-byte Fifo
Manufacturer
Exar Corporation
Datasheet
1.XR16V654.pdf
(58 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
xr16v654DIV-F
Manufacturer:
Exar
Quantity:
260
Company:
Part Number:
xr16v654DIV-F
Manufacturer:
Exar Corporation
Quantity:
10 000
Company:
Part Number:
xr16v654IJ-F
Manufacturer:
Exar Corporation
Quantity:
10 000
Company:
Part Number:
xr16v654IL-F
Manufacturer:
TI
Quantity:
1 600
Part Number:
xr16v654IL-F
Manufacturer:
EXAR/艾科嘉
Quantity:
20 000
Company:
Part Number:
xr16v654IQ-F
Manufacturer:
Exar Corporation
Quantity:
10 000
Company:
Part Number:
xr16v654IV-F
Manufacturer:
EXAR
Quantity:
140
Company:
Part Number:
xr16v654IV-F
Manufacturer:
Exar Corporation
Quantity:
10 000
Part Number:
xr16v654IV-F
Manufacturer:
EXAR/艾科嘉
Quantity:
20 000
REV. 1.0.1
The V654 UART includes the infrared encoder and decoder compatible to the IrDA (Infrared Data Association)
version 1.0. The IrDA 1.0 standard that stipulates the infrared encoder sends out a 3/16 of a bit wide HIGH-
pulse for each “0” bit in the transmit data stream. This signal encoding reduces the on-time of the infrared LED,
hence reduces the power consumption. See
The infrared encoder and decoder are enabled by setting MCR register bit-6 to a ‘1’. When the infrared feature
is enabled, the transmit data output, TX, idles at logic zero level. Likewise, the RX input assumes an idle level
of logic zero from a reset and power up, see
Typically, the wireless infrared decoder receives the input pulse from the infrared sensing diode on the RX pin.
Each time it senses a light pulse, it returns a logic 1 to the data bit stream.
F
2.16
IGURE
13. I
Infrared Mode
NFRARED
T
RANSMIT
TX Data
Transmit
(TX Pin)
IR Pulse
Receive
IR Pulse
(RX pin)
RX Data
D
ATA
0
E
Bit Time
NCODING AND
Bit Time
0
1
1/16 Clock Delay
1
Figure 13
Figure
0
0
1
Character
13.
Data Bits
1
R
23
0
below.
ECEIVE
Data Bits
Character
3/16 Bit Time
0
2.25V TO 3.6V QUAD UART WITH 64-BYTE FIFO
0
0
D
1
ATA
1
1
D
1
ECODING
0
0
1
1/2 Bit Time
1
IRdecoder-1
IrEncoder-1
XR16V654/654D