FIGURE 7. BAUD RAT" />
參數資料
型號: XR16M770IL32-0C-EB
廠商: Exar Corporation
文件頁數: 4/52頁
文件大?。?/td> 0K
描述: EVAL BOARD FOR XR16M770-C 32QFN
標準包裝: 1
系列: *
FIGURE 7. BAUD RATE GENERATOR
XTAL1
XTAL2
/
-
(default)
16X or 8X or 4X
Sampling Rate Clock
to Transmitter
Prescaler
Divide by 1
Prescaler
Divide by 4
MCR Bit 7= 0
MCR Bit -7=1
Crystal
Osc
Buffer
DLL
DLM
DLD[5:0]
DLL
DLM
DLD[5:0]
16X or 8X or 4X
Sampling Rate Clock
to Receiver
DLD[7]=0
DLD[7]=1
0
1
DLD[6]
TABLE 3: TYPICAL DATA RATES WITH A 24 MHZ CRYSTAL OR EXTERNAL CLOCK AT 16X SAMPLING
Required
Output Data
Rate
DIVISOR FOR 16x
Clock
(Decimal)
DIVISOR
OBTAINABLE IN
M770
DLM PROGRAM
VALUE (HEX)
DLL PROGRAM
VALUE (HEX)
DLD PROGRAM
VALUE (HEX)
DATA ERROR
RATE (%)
400
3750
E
A6
0
2400
625
2
71
0
4800
312.5
312 8/16
1
38
8
0
9600
156.25
156 4/16
0
9C
4
0
10000
150
0
96
0
19200
78.125
78 2/16
0
4E
2
0
25000
60
0
3C
0
28800
52.0833
52 1/16
0
34
1
0.04
38400
39.0625
39 1/16
0
27
1
0
50000
30
0
1E
0
57600
26.0417
26 1/16
0
1A
1
0.08
75000
20
0
14
0
100000
15
0
F
0
115200
13.0208
13
0
D
0
0.16
153600
9.7656
9 12/16
0
9
C
0.16
200000
7.5
7 8/16
0
7
8
0
225000
6.6667
6 11/16
0
6
B
0.31
230400
6.5104
6 8/16
0
6
8
0.16
250000
6
0
6
0
300000
5
0
5
0
400000
3.75
3 12/16
0
3
C
0
460800
3.2552
3 4/16
0
3
4
0.16
500000
3
0
3
0
750000
2
0
2
0
921600
1.6276
1 10/16
0
1
A
0.16
1000000
1.5
1 8/16
0
1
8
0
XR16M770
12
1.62V TO 3.63V HIGH PERFORMANCE UART WITH 64-BYTE FIFO
REV. 1.0.2
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