xr16m670 Exar Corporation, xr16m670 Datasheet - Page 51

• Manufacturer Part Number: xr16m670
• Description: 1.62v To 3.63v High Performance Uart With 32-byte Fifo
• Manufacturer: Exar Corporation

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............................................................................................................. 23
4.0 INTERNAL REGISTER DESCRIPTIONS .............................................................................................. 25
F
A
ORDERING INFORMATION
EATURES
PPLICATIONS
2.1 CPU INTERFACE ................................................................................................................................................ 6
2.2 SERIAL INTERFACE........................................................................................................................................... 7
2.3 DEVICE RESET ................................................................................................................................................... 9
2.4 INTERNAL REGISTERS...................................................................................................................................... 9
2.5 INT OUPUT .......................................................................................................................................................... 9
2.6 CRYSTAL OSCILLATOR OR EXTERNAL CLOCK INPUT.............................................................................. 10
2.7 PROGRAMMABLE BAUD RATE GENERATOR WITH FRACTIONAL DIVISOR ........................................... 11
2.8 TRANSMITTER.................................................................................................................................................. 13
2.9 RECEIVER ......................................................................................................................................................... 14
2.10 AUTO RTS (HARDWARE) FLOW CONTROL ................................................................................................ 16
2.11 AUTO RTS HYSTERESIS ............................................................................................................................... 16
2.12 AUTO CTS FLOW CONTROL......................................................................................................................... 16
2.13 AUTO XON/XOFF (SOFTWARE) FLOW CONTROL...................................................................................... 18
2.14 SPECIAL CHARACTER DETECT.................................................................................................................. 18
2.15 NORMAL MULTIDROP MODE........................................................................................................................ 18
2.16 INFRARED MODE ........................................................................................................................................... 19
2.17 SLEEP MODE WITH AUTO WAKE-UP AND POWER-SAVE FEATURE ...................................................... 20
2.18 INTERNAL LOOPBACK................................................................................................................................. 22
4.1 RECEIVE HOLDING REGISTER (RHR) - READ- ONLY .................................................................................. 25
4.2 TRANSMIT HOLDING REGISTER (THR) - WRITE-ONLY ............................................................................... 25
4.3 INTERRUPT ENABLE REGISTER (IER) - READ/WRITE ................................................................................ 26
F
F
F
F
F
T
T
F
F
T
F
F
F
F
T
F
T
F
F
T
T
IGURE
IGURE
IGURE
IGURE
IGURE
ABLE
ABLE
IGURE
IGURE
ABLE
IGURE
IGURE
IGURE
IGURE
ABLE
IGURE
ABLE
IGURE
IGURE
ABLE
ABLE
2.7.1 INDEPENDENT TX/RX BRG......................................................................................................................................... 11
2.8.1 TRANSMIT HOLDING REGISTER (THR) - WRITE ONLY........................................................................................... 13
2.8.2 TRANSMITTER OPERATION IN NON-FIFO MODE .................................................................................................... 13
2.8.3 TRANSMITTER OPERATION IN FIFO MODE ............................................................................................................. 14
2.9.1 RECEIVE HOLDING REGISTER (RHR) - READ-ONLY .............................................................................................. 14
2.15.1 AUTO ADDRESS DETECTION .................................................................................................................................. 19
2.17.1 SLEEP MODE ............................................................................................................................................................. 20
2.17.2 POWER-SAVE FEATURE .......................................................................................................................................... 21
2.17.3 WAKE-UP INTERRUPT .............................................................................................................................................. 21
4.3.1 IER VERSUS RECEIVE FIFO INTERRUPT MODE OPERATION ............................................................................... 26
4.3.2 IER VERSUS RECEIVE/TRANSMIT FIFO POLLED MODE OPERATION.................................................................. 26
1: INT P
2: INT P
3: T
4: A
5: A
6: UART INTERNAL REGISTERS .................................................................................................................................. 23
7: INTERNAL REGISTERS DESCRIPTION. S
1. XR16M670 B
2. P
3. XR16M670 T
4. XR16M670 T
5. XR16M670 T
6. T
7. B
8. T
9. T
10. R
11. R
12. A
13. I
14. I
.................................................................................................................................................... 1
YPICAL DATA RATES WITH A
UTO
UTO
YPICAL
RANSMITTER
RANSMITTER
IN
AUD
NFRARED
NTERNAL
UTO
ECEIVER
ECEIVER
.............................................................................................................................................. 1
O
IN
IN
RTS (H
X
UT
R
ON
O
O
RTS
ATE
C
A
PERATION FOR
PERATION FOR
/X
RYSTAL
SSIGNMENT
L
OFF
T
O
O
G
OOPBACK
ARDWARE
AND
RANSMIT
YPICAL
YPICAL
YPICAL
PERATION IN NON
PERATION IN
LOCK
ENERATOR
O
O
............................................................................................................................... 2
PERATION IN NON
PERATION IN
(S
CTS F
C
OFTWARE
D
ONNECTIONS
I
S
S
IAGRAM
NTEL
................................................................................................................................................... 22
D
F
) F
ERIAL
ERIAL
OR
ATA
T
R
LOW
............................................................................................................................................... 12
LOW
RANSMITTER
ECEIVER
FIFO
D
24-
24 MH
) F
E
I
I
FIFO
ATA
C
.......................................................................................................................................... 1
NTERFACE
NTERFACE
NCODING AND
C
-FIFO M
LOW
PIN
ONTROL
ONTROL
AND
1.62V TO 3.63V HIGH PERFORMANCE UART WITH 32-BYTE FIFO
-FIFO M
.................................................................................................................................. 10
B
Z CRYSTAL OR EXTERNAL CLOCK AT
QFN, 32-
US
AND
.................................................................................................................................. 9
C
A
ONTROL
I
............................................................................................................................. 9
UTO
NTERCONNECTIONS
ODE
O
F
C
C
........................................................................................................................ 16
LOW
PERATION
ONNECTIONS
ONNECTIONS
ODE
RTS F
.................................................................................................................. 15
R
PIN
HADED BITS ARE ENABLED WHEN
ECEIVE
C
.............................................................................................................. 13
............................................................................................................... 18
ONTROL
QFN
LOW
....................................................................................................... 17
I
D
AND
................................................................................................... 7
................................................................................................... 8
ATA
C
M
ONTROL
.............................................................................................. 6
ODE
25-BGA P
D
ECODING
..................................................................................... 14
M
ODE
ACKAGES
16X S
.......................................................................... 20
....................................................................... 15
AMPLING
EFR B
............................................................... 2
IT
................................................... 12
-4=1 ......................................... 24
XR16M670