sc16c850lib NXP Semiconductors, sc16c850lib Datasheet - Page 15

• Manufacturer Part Number: sc16c850lib
• Description: Sc16c850l 1.8 V Single Uart, 5 Mbit/s Max. With 128-byte Fifos, Infrared Irda And 16 Mode Or 68 Mode Parallel Bus Interface
• Manufacturer: NXP Semiconductors

NXP Semiconductors
SC16C850L_4
Product data sheet
Programming the baud rate generator registers CLKPRES, DLM (MSB) and DLL (LSB)
provides a user capability for selecting the desired final baud rate. The example in
shows the selectable baud rate table available when using a 1.8432 MHz external clock
input when MCR[7] = 0, and CLKPRES = 0x00.
Table 7.
Output
baud rate
(bit/s)
50
75
110
150
300
600
1.2 k
2.4 k
3.6 k
4.8 k
7.2 k
9.6 k
19.2 k
Fig 7. Crystal oscillator connection
Fig 8. External clock connection
If f
XTAL2 pin should be left unconnected when an external clock is used.
XTAL1
Baud rate generator programming table using a 1.8432 MHz clock when
MCR[7] = 0 and CLKPRES[3:0] = 0
Output
16 clock divisor
(decimal)
2304
1536
1047
768
384
192
96
48
32
24
16
12
6
frequency is greater than 50 MHz, then a DC blocking capacitor is required.
1.8 V single UART with 128-byte FIFOs and IrDA encoder/decoder
Rev. 04 — 13 December 2007
XTAL1
1.8432 MHz
C1
22 pF
X1
f
XTAL1
XTAL2
Output
16 clock divisor
(hexadecimal)
900
600
417
300
180
C0
60
30
20
18
10
0C
06
C2
33 pF
100 pF
XTAL1
XTAL1
XTAL2
002aac630
1.8432 MHz
C1
22 pF
DLM
program value
(hexadecimal)
09
06
04
03
01
00
00
00
00
00
00
00
00
X1
XTAL2
002aaa870
1.5 k
C2
47 pF
SC16C850L
© NXP B.V. 2007. All rights reserved.
DLL
program value
(hexadecimal)
00
00
17
00
80
C0
60
30
20
18
10
0C
06
Table 7
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