XR16L580 Exar Corporation, XR16L580 Datasheet - Page 46

• Manufacturer Part Number: XR16L580
• Description: Smallest 2.25 to 5.5V Uart With 16-Byte Fifo And Power-save
• Manufacturer: Exar Corporation

XR16L580
REV. 1.0.0
GENERAL DESCRIPTION .................................................................................................1
PIN DESCRIPTIONS .........................................................................................................3
1.0 PRODUCT DESCRIPTION .....................................................................................................................5
2.0 FUNCTIONAL DESCRIPTIONS .............................................................................................................6
3.0 UART INTERNAL REGISTERS ...........................................................................................................20
4.0 INTERNAL REGISTER DESCRIPTIONS .............................................................................................22
A
F
ORDERING INFORMATION
PPLICATIONS
EATURES
2.1 CPU INTERFACE .............................................................................................................................................. 6
2.2 5-VOLT TOLERANT INPUTS ........................................................................................................................... 7
2.3 DEVICE HARDWARE RESET .......................................................................................................................... 7
2.4 DEVICE IDENTIFICATION AND REVISION ..................................................................................................... 7
2.5 INTERNAL REGISTERS ................................................................................................................................... 7
2.6 DMA MODE ....................................................................................................................................................... 7
2.7 INT (IRQ#) OUTPUT ......................................................................................................................................... 7
2.8 CRYSTAL OR EXTERNAL CLOCK INPUT ..................................................................................................... 8
2.9
2.10 TRANSMITTER ............................................................................................................................................. 11
2.11 RECEIVER .................................................................................................................................................... 12
2.12
2.13
2.14
2.15
2.16
2.17 INFRARED MODE ........................................................................................................................................ 17
2.18
2.19
4.1 RECEIVE HOLDING REGISTER (RHR) - READ- ONLY ............................................................................... 22
4.2 TRANSMIT HOLDING REGISTER (THR) - WRITE-ONLY ............................................................................ 22
4.3 BAUD RATE GENERATOR DIVISORS (DLL AND DLM) - READ/WRITE ................................................... 22
4.4 INTERRUPT ENABLE REGISTER (IER) - READ/WRITE .............................................................................. 22
F
F
F
T
F
T
F
F
T
F
F
F
F
F
T
F
F
T
T
IGURE
IGURE
IGURE
ABLE
IGURE
ABLE
IGURE
IGURE
ABLE
IGURE
IGURE
IGURE
IGURE
IGURE
ABLE
IGURE
IGURE
ABLE
ABLE
2.10.1 TRANSMIT HOLDING REGISTER (THR) - WRITE ONLY ....................................................................................... 11
2.10.2 TRANSMITTER OPERATION IN NON-FIFO MODE ................................................................................................ 11
2.10.3 TRANSMITTER OPERATION IN FIFO MODE ......................................................................................................... 11
2.11.1 RECEIVE HOLDING REGISTER (RHR) - READ-ONLY .......................................................................................... 12
2.18.1 SLEEP MODE ........................................................................................................................................................... 18
2.18.2 POWER-SAVE FEATURE ........................................................................................................................................ 18
4.4.1 IER VERSUS RECEIVE FIFO INTERRUPT MODE OPERATION ............................................................................. 22
4.4.2 IER VERSUS RECEIVE/TRANSMIT FIFO POLLED MODE OPERATION ................................................................ 22
PROGRAMMABLE BAUD RATE GENERATOR ............................................................................................ 9
AUTO RTS (HARDWARE) FLOW CONTROL ............................................................................................ 14
AUTO RTS HYSTERESIS ............................................................................................................................ 14
AUTO CTS FLOW CONTROL ..................................................................................................................... 14
AUTO XON/XOFF (SOFTWARE) FLOW CONTROL .................................................................................. 16
SPECIAL CHARACTER DETECT ............................................................................................................... 16
SLEEP MODE WITH WAKE-UP INTERRUPT AND POWER-SAVE FEATURE ........................................ 18
INTERNAL LOOPBACK .............................................................................................................................. 19
1: INT (IRQ#) P
2: INT (IRQ#) P
3: T
4: A
5: UART INTERNAL REGISTERS .................................................................................................................................... 20
6: INTERNAL REGISTERS DESCRIPTION. S
1. B
2. P
3. XR16L580 T
4. T
5. E
6. B
7. T
8. T
9. R
10. R
11. A
12. I
13. I
.....................................................................................................................................................1
YPICAL DATA RATES WITH A
UTO
YPICAL
RANSMITTER
RANSMITTER
LOCK
ACKAGES AND
XTERNAL
AUD
ECEIVER
NFRARED
NTERNAL
................................................................................................................................................1
UTO
ECEIVER
X
R
ON
D
RTS
ATE
C
IAGRAM
/X
RYSTAL CONNECTIONS
O
C
L
OFF
T
O
G
PERATION IN NON
IN
IN
LOCK
OOP
AND
YPICAL
RANSMIT
PERATION IN
ENERATOR AND
O
O
.................................................................................................................................2
O
O
P
(S
PERATION IN NON
PERATION IN
............................................................................................................................................................. 1
PERATION FOR
PERATION
IN
CTS F
B
C
OFTWARE
ACK
O
ONNECTION FOR
I
NTEL
UT
D
SMALLEST 2.25V TO 5.5V UART WITH 16-BYTE FIFO AND POWERSAVE
................................................................................................................................................. 19
ATA
LOW
................................................................................................................................................. 2
/M
FIFO
F
14.7456 MH
) F
E
OTOROLA
OR
FIFO
C
-FIFO M
P
NCODING AND
LOW
TABLE OF CONTENTS
ONTROL
RESCALER
T
R
AND
..................................................................................................................................... 8
-FIFO M
RANSMITTER
ECEIVER
AND
C
E
A
ONTROL
XTENDED
ODE
D
UTO
O
F
ATA
Z CRYSTAL OR EXTERNAL CLOCK
LOW
PERATION
....................................................................................................................... 9
ODE
...................................................................................................................... 8
.................................................................................................................... 13
RTS F
R
B
HADED BITS ARE ENABLED WHEN
................................................................................................................. 7
............................................................................................................... 16
ECEIVE
C
US
.............................................................................................................. 11
ONTROL
D
I
ATA
NTERCONNECTIONS
LOW
....................................................................................................... 15
I
D
R
C
ATA
ATE
M
ONTROL
ODE
D
............................................................................................ 9
ECODING
..................................................................................... 12
M
ODE
............................................................................. 6
.......................................................................... 17
....................................................................... 13
...................................................................... 10
EFR B
IT
-4=1.......................................... 21
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