xr20m1280 Exar Corporation, xr20m1280 Datasheet - Page 16

• Manufacturer Part Number: xr20m1280
• Description: I2c/spi Uart With 128-byte Fifo And Integrated Level Shifters
• Manufacturer: Exar Corporation

XR20M1280
I2C/SPI UART WITH 128-BYTE FIFO AND INTEGRATED LEVEL SHIFTERS
F
IGURE
Required Output
XTAL1
XTAL2
Data Rate
1000000
100000
153600
200000
225000
230400
250000
300000
400000
460800
500000
750000
921600
115200
10000
19200
25000
28800
38400
50000
57600
75000
2400
4800
9600
13. B
400
T
ABLE
AUD
Crystal
Buffer
6: T
Osc
R
YPICAL DATA RATES WITH A
/
ATE
Clock (Decimal)
D
IVISOR FOR
G
52.0833
39.0625
26.0417
13.0208
156.25
78.125
9.7656
6.6667
6.5104
3.2552
1.6276
ENERATOR
312.5
3750
3.75
625
150
7.5
1.5
60
30
20
15
6
5
3
2
Divide by 4
Divide by 1
Prescaler
Prescaler
16x
MCR Bit 7= 0
MCR Bit -7=1
DLM P
V
(default)
ALUE
24 MH
PRELIMINARY
-
E
ROGRAM
2
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
(HEX)
DLD[7]=1
DLD[7]=0
Z CRYSTAL OR EXTERNAL CLOCK AT
16
DLL P
V
DLD[5:0]
DLD[5:0]
ALUE
DLM
DLM
DLL
DLL
A6
9C
4E
3C
1E
1A
71
38
96
34
27
14
F
D
ROGRAM
9
7
6
6
6
5
3
3
3
2
1
1
(HEX)
DLD[6]
DLD P
V
ALUE
0
1
ROGRAM
C
A
C
A
0
0
8
4
0
2
0
1
1
0
0
0
0
0
8
8
0
0
4
0
0
8
(HEX)
16X S
Sampling Rate Clock
Sampling Rate Clock
16X or 8X or 4X
16X or 8X or 4X
to Transmitter
AMPLING
to Receiver
D
ATA
R
REV. P1.1.1
ATE
0.04
0.08
0.16
0.16
0.31
0.16
0.16
0.16
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
E
RROR
(%)