SC16C550B Datasheet, PDF (48/48 Pages) NXP Semiconductors – 5 V, 3.3 V and 2.5 V UART with 16-byte FIFOs

NXP Semiconductors
SC16C550B
5 V, 3.3 V and 2.5 V UART with 16-byte FIFOs
18. Contents
1
General description . . . . . . . . . . . . . . . . . . . . . . 1
2
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
3
Ordering information . . . . . . . . . . . . . . . . . . . . . 2
4
Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . 3
5
Pinning information . . . . . . . . . . . . . . . . . . . . . . 4
5.1
Pinning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
5.2
Pin description . . . . . . . . . . . . . . . . . . . . . . . . . 6
6
Functional description . . . . . . . . . . . . . . . . . . . 9
6.1
6.2
6.3
6.3.1
6.3.2
6.3.3
6.3.4
6.4
6.5
6.6
6.7
Internal registers. . . . . . . . . . . . . . . . . . . . . . . 10
FIFO operation . . . . . . . . . . . . . . . . . . . . . . . . 10
Autoflow control . . . . . . . . . . . . . . . . . . . . . . . 11
Auto-RTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Auto-CTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Enabling autoflow control and auto-CTS . . . . 12
Auto-CTS and auto-RTS functional timing . . . 12
Hardware/software and time-out interrupts. . . 13
Programmable baud rate generator . . . . . . . . 14
DMA operation . . . . . . . . . . . . . . . . . . . . . . . . 15
Loopback mode . . . . . . . . . . . . . . . . . . . . . . . 16
7
Register descriptions . . . . . . . . . . . . . . . . . . . 18
7.1
7.2
7.2.1
7.2.2
7.3
7.3.1
7.3.1.1
7.3.1.2
7.3.2
7.4
7.5
7.6
7.7
7.8
7.9
7.10
Transmit Holding Register (THR) and Receive
Holding Register (RHR) . . . . . . . . . . . . . . . . . 19
Interrupt Enable Register (IER) . . . . . . . . . . . 19
IER versus Receive FIFO interrupt mode
operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
IER versus Receive/Transmit FIFO
polled mode operation . . . . . . . . . . . . . . . . . . 20
FIFO Control Register (FCR) . . . . . . . . . . . . . 20
DMA mode . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Mode 0 (FCR bit 3 = 0) . . . . . . . . . . . . . . . . . . 20
Mode 1 (FCR bit 3 = 1) . . . . . . . . . . . . . . . . . . 20
FIFO mode . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Interrupt Status Register (ISR) . . . . . . . . . . . . 22
Line Control Register (LCR) . . . . . . . . . . . . . . 23
Modem Control Register (MCR) . . . . . . . . . . . 25
Line Status Register (LSR) . . . . . . . . . . . . . . . 26
Modem Status Register (MSR). . . . . . . . . . . . 27
Scratchpad Register (SPR) . . . . . . . . . . . . . . 28
SC16C550B external reset conditions . . . . . . 28
8
Limiting values. . . . . . . . . . . . . . . . . . . . . . . . . 28
9
Static characteristics. . . . . . . . . . . . . . . . . . . . 29
10
Dynamic characteristics . . . . . . . . . . . . . . . . . 30
10.1
Timing diagrams . . . . . . . . . . . . . . . . . . . . . . . 32
11
Package outline . . . . . . . . . . . . . . . . . . . . . . . . 38
12
Soldering of SMD packages . . . . . . . . . . . . . . 42
12.1
Introduction to soldering . . . . . . . . . . . . . . . . . 42
12.2
Wave and reflow soldering . . . . . . . . . . . . . . . 42
12.3
Wave soldering. . . . . . . . . . . . . . . . . . . . . . . . 42
12.4
Reflow soldering. . . . . . . . . . . . . . . . . . . . . . . 43
13
Soldering of through-hole mount packages . 44
13.1
Introduction to soldering through-hole mount
packages . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
13.2
Soldering by dipping or by solder wave . . . . . 44
13.3
Manual soldering . . . . . . . . . . . . . . . . . . . . . . 44
13.4
Package related soldering information . . . . . . 45
14
Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . 45
15
Revision history . . . . . . . . . . . . . . . . . . . . . . . 46
16
Legal information . . . . . . . . . . . . . . . . . . . . . . 47
16.1
Data sheet status . . . . . . . . . . . . . . . . . . . . . . 47
16.2
Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
16.3
Disclaimers. . . . . . . . . . . . . . . . . . . . . . . . . . . 47
16.4
Trademarks . . . . . . . . . . . . . . . . . . . . . . . . . . 47
17
Contact information . . . . . . . . . . . . . . . . . . . . 47
18
Contents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Please be aware that important notices concerning this document and the product(s)
described herein, have been included in section ‘Legal information’.
© NXP B.V. 2008.
All rights reserved.
For more information, please visit: http://www.nxp.com
For sales office addresses, please send an email to: [e-mail]
Date of release: 1 October 2008
Document identifier: SC16C550B_5