W83877TF Datasheet, PDF (11/154 Pages) Winbond – I/O chip disk drive adapter

W83877TF
3.2.9 User-defined Register (UDR) (Read/Write)
This is a temporary register that can be accessed and defined by the user.
TABLE 3-5 BAUD RATE TABLE
BAUD RATE USING 24 MHZ TO GENERATE 1.8461 MHZ
Desired Baud Rate
Decimal divisor used to
generate 16X clock
Percent error difference between
desired and actual
50
2304
**
75
1536
**
110
1047
0.18%
134.5
857
0.099%
150
768
**
300
384
**
600
192
1200
96
1800
64
2000
58
2400
48
3600
32
4800
24
7200
16
9600
12
19200
6
**
**
**
0.53%
**
**
**
**
**
**
38400
3
**
57600
2
**
115200
1
**
230400
4 ^{Note 1}
**
460800
2 ^{Note 1}
**
921600
1 ^{Note 1}
**
1.5M
1 ^{Note 2}
0%
Note 1: Only use in high speed mode, when FASTA/FASTB bits are set (refer to CR19 bit1 and CR19 bit0).
Note 2: Only use in high speed mode, when TURA/TURB bits are set (refer to CR0C bit7 and bit6).
** The percentage error for all baud rates, except where indicated otherwise, is 0.16%
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Publication Release Date: March 1998
Version 0.61