© Koninklijke Philips Electronics N.V. 2004.
Printed in the U.S.A.
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thereof does not convey nor imply any license under patent- or other industrial or
intellectual property rights.
Date of release: 10 May 2004 Document order number: 9397 750 13132
Contents
Philips Semiconductors
SC16C554/554D
Quad UART with 16-byte FIFO and infrared (IrDA) encoder/decoder
1 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
2 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
3 Ordering information . . . . . . . . . . . . . . . . . . . . . 2
4 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . 3
5 Pinning information. . . . . . . . . . . . . . . . . . . . . . 5
5.1 Pinning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
5.1.1 PLCC68 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
5.1.2 LQFP64 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
5.1.3 LQFP80 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
5.2 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . 9
6 Functional description . . . . . . . . . . . . . . . . . . 13
6.1 Interface options . . . . . . . . . . . . . . . . . . . . . . . 14
6.2 The 16 mode interface . . . . . . . . . . . . . . . . . . 14
6.3 The 68 mode interface . . . . . . . . . . . . . . . . . . 14
6.4 Internal registers. . . . . . . . . . . . . . . . . . . . . . . 15
6.5 FIFO operation . . . . . . . . . . . . . . . . . . . . . . . . 15
6.6 Hardware flow control. . . . . . . . . . . . . . . . . . . 16
6.7 Software flow control . . . . . . . . . . . . . . . . . . . 16
6.8 Special feature software flow control . . . . . . . 17
6.9 Hardware/software and time-out interrupts. . . 17
6.10 Programmable baud rate generator . . . . . . . . 18
6.11 DMA operation . . . . . . . . . . . . . . . . . . . . . . . . 19
6.12 Sleep mode. . . . . . . . . . . . . . . . . . . . . . . . . . . 19
6.13 Loop-back mode. . . . . . . . . . . . . . . . . . . . . . . 19
7 Register descriptions . . . . . . . . . . . . . . . . . . . 22
7.1 Transmit (THR) and Receive (RHR)
Holding Registers . . . . . . . . . . . . . . . . . . . . . 23
7.2 Interrupt Enable Register (IER) . . . . . . . . . . . 23
7.2.1 IER versus Receive FIFO interrupt
mode operation . . . . . . . . . . . . . . . . . . . . . . . 24
7.2.2 IER versus Receive/Transmit FIFO polled
mode operation . . . . . . . . . . . . . . . . . . . . . . . 24
7.3 FIFO Control Register (FCR) . . . . . . . . . . . . . 25
7.3.1 DMA mode . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
7.3.2 FIFO mode . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
7.4 Interrupt Status Register (ISR) . . . . . . . . . . . . 27
7.5 Line Control Register (LCR) . . . . . . . . . . . . . . 28
7.6 Modem Control Register (MCR) . . . . . . . . . . . 30
7.7 Line Status Register (LSR). . . . . . . . . . . . . . . 31
7.8 Modem Status Register (MSR). . . . . . . . . . . . 32
7.9 Scratchpad Register (SPR) . . . . . . . . . . . . . . 33
7.10 Enhanced Feature Register (EFR) . . . . . . . . . 33
7.11 SC16C554/554D external reset conditions. . . 35
8 Limiting values. . . . . . . . . . . . . . . . . . . . . . . . . 35
9 Static characteristics. . . . . . . . . . . . . . . . . . . . 36
10 Dynamic characteristics . . . . . . . . . . . . . . . . . 37
10.1 Timing diagrams . . . . . . . . . . . . . . . . . . . . . . . 38
11 Package outline . . . . . . . . . . . . . . . . . . . . . . . . 47
12 Soldering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
12.1 Introduction to soldering surface mount
packages. . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
12.2 Reflow soldering. . . . . . . . . . . . . . . . . . . . . . . 50
12.3 Wave soldering. . . . . . . . . . . . . . . . . . . . . . . . 50
12.4 Manual soldering . . . . . . . . . . . . . . . . . . . . . . 51
12.5 Package related soldering information. . . . . . 51
13 Revision history . . . . . . . . . . . . . . . . . . . . . . . 53
14 Data sheet status. . . . . . . . . . . . . . . . . . . . . . . 54
15 Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
16 Disclaimers . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
