XR16C872 Datasheet, PDF (17/60 Pages) Exar Corporation – DUAL UART WITH 1284 PARALLEL PORT AND PLUG-AND-PLAY CONTROLLER

DISCONTINUED
XR16C872
Output
Baud Rate
MCR
BIT-7=1
50
75
150
300
600
1200
2400
4800
7200
9600
19.2k
38.4k
57.6k
115.2k
Output
Baud Rate
MCR
Bit-7=0
User
16 x Clock
Divisor
(Decimal)
User
16 x Clock
Divisor
(HEX)
200
2304
900
300
1536
600
600
768
300
1200
384
180
2400
192
C0
4800
96
60
9600
48
30
19.2K
24
18
28.8K
16
10
38.4k
12
0C
76.8k
6
06
153.6k
3
03
230.4k
2
02
460.8k
1
01
DLM
Program
Value
(HEX)
09
06
03
01
00
00
00
00
00
00
00
00
00
00
DLL
Program
Value
(HEX)
00
00
00
80
C0
60
30
18
10
0C
06
03
02
01
Table 3, Baud Rate Generator Standard Programming Table with 7.3728 MHz Clock
7.3728 MHz.
Clock from
Osc. & Divider
Pre-scaler
divides
by 1
Pre-scaler
divides
by 4
DLM and DLL
Registers
MCR
Bit-7=0
(default)
Baud
Rate
Generator
MCR
Bit-7=1
Baud Clock to
Transmitter
and Receiver
Figure 6, Clock Pre-scaler and Baud Rate Generator Circuitry
Rev. 1.00
Visit Exar Web Site at www.exar.com
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