XR16C872CQ EXAR [Exar Corporation], XR16C872CQ Datasheet - Page 17

• Manufacturer Part Number: XR16C872CQ
• Description: DUAL UART WITH 1284 PARALLEL PORT AND PLUG-AND-PLAY CONTROLLER
• Manufacturer: EXAR [Exar Corporation]

Rev. 1.00
Baud Rate
BIT-7=1
Table 3, Baud Rate Generator Standard Programming Table with 7.3728 MHz Clock
Output
115.2k
19.2k
38.4k
57.6k
7.3728 MHz.
Clock from
Osc. & Divider
MCR
1200
2400
4800
7200
9600
150
300
600
50
75
Figure 6, Clock Pre-scaler and Baud Rate Generator Circuitry
Baud Rate 16 x Clock
Output
Bit-7=0
153.6k
230.4k
460.8k
19.2K
28.8K
38.4k
76.8k
MCR
1200
2400
4800
9600
200
300
600
Pre-scaler
Pre-scaler
(Decimal)
divides
divides
Divisor
by 1
by 4
User
2304
1536
768
384
192
96
48
24
16
12
6
3
2
1
DISCONTINUED
17
16 x Clock
Divisor
(HEX)
User
900
600
300
180
(default)
C0
0C
60
30
18
10
06
03
02
01
Bit-7=1
Bit-7=0
M C R
M C R
DLM and DLL
Registers
Generator
Baud
Rate
Visit Exar Web Site at www.exar.com
Program
Value
(HEX)
DLM
09
06
03
01
00
00
00
00
00
00
00
00
00
00
Baud Clock to
XR16C872
and Receiver
Program
Transmitter
(HEX)
Value
DLL
0C
C0
00
00
00
80
60
30
18
10
06
03
02
01