
Koninklijke Philips Electronics N.V. 2005
All rights are reserved. Reproduction in whole or in part is prohibited without the prior
written consent of the copyright owner. The information presented in this document does
not form part of any quotation or contract, is believed to be accurate and reliable and may
be changed without notice. No liability will be accepted by the publisher for any
consequence of its use. Publication thereof does not convey nor imply any license under
patent- or other industrial or intellectual property rights.
Date of release: 9 February 2005
Document number: 9397 750 13133
Published in The Netherlands
Philips Semiconductors
SC16C554B/554DB
5 V, 3.3 V and 2.5 V quad UART, 5 Mbit/s (max.) with 16-byte FIFOs
20. Contents
1
2
3
4
5
5.1
5.1.1
5.1.2
5.1.3
5.2
6
6.1
6.1.1
6.1.2
6.2
6.3
6.4
6.4.1
6.4.2
6.4.3
6.4.4
6.5
6.6
6.7
6.8
7
7.1
General description. . . . . . . . . . . . . . . . . . . . . . 1
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Ordering information. . . . . . . . . . . . . . . . . . . . . 2
Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Pinning information. . . . . . . . . . . . . . . . . . . . . . 5
Pinning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
PLCC68 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
LQFP64 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
LQFP80 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Pin description . . . . . . . . . . . . . . . . . . . . . . . . . 9
Functional description . . . . . . . . . . . . . . . . . . 13
Interface options . . . . . . . . . . . . . . . . . . . . . . . 14
The 16 mode interface . . . . . . . . . . . . . . . . . . 14
The 68 mode interface . . . . . . . . . . . . . . . . . . 14
Internal registers. . . . . . . . . . . . . . . . . . . . . . . 15
FIFO operation . . . . . . . . . . . . . . . . . . . . . . . . 15
Autoflow control (see
Figure 7
). . . . . . . . . . . . 16
Auto-RTS (see
Figure 7
). . . . . . . . . . . . . . . . . 16
Auto-CTS (see
Figure 7
). . . . . . . . . . . . . . . . . 16
Enabling autoflow control and auto-CTS . . . . 17
Auto-CTS and auto-RTS functional timing . . . 17
Hardware/software and time-out interrupts. . . 18
Programmable baud rate generator . . . . . . . . 18
DMA operation . . . . . . . . . . . . . . . . . . . . . . . . 20
Loop-back mode. . . . . . . . . . . . . . . . . . . . . . . 20
Register descriptions . . . . . . . . . . . . . . . . . . . 23
Transmit (THR) and Receive (RHR) Holding
Registers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Interrupt Enable Register (IER) . . . . . . . . . . . 24
IER versus Receive FIFO interrupt mode
operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
IER versus Receive/Transmit FIFO polled mode
operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
FIFO Control Register (FCR) . . . . . . . . . . . . . 25
DMA mode . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Mode 0 (FCR bit 3 = 0). . . . . . . . . . . . . . . . . . 25
Mode 1 (FCR bit 3 = 1). . . . . . . . . . . . . . . . . . 25
FIFO mode . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Interrupt Status Register (ISR) . . . . . . . . . . . . 27
Line Control Register (LCR) . . . . . . . . . . . . . . 28
Modem Control Register (MCR). . . . . . . . . . . 30
Line Status Register (LSR). . . . . . . . . . . . . . . 31
Modem Status Register (MSR). . . . . . . . . . . . 32
Scratchpad Register (SPR) . . . . . . . . . . . . . . 33
SC16C554B/554DB external reset
conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
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
8
9
10
10.1
11
12
12.1
Limiting values . . . . . . . . . . . . . . . . . . . . . . . . 34
Static characteristics . . . . . . . . . . . . . . . . . . . 35
Dynamic characteristics. . . . . . . . . . . . . . . . . 36
Timing diagrams. . . . . . . . . . . . . . . . . . . . . . . 37
Package outline. . . . . . . . . . . . . . . . . . . . . . . . 44
Soldering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Introduction to soldering surface mount
packages . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Reflow soldering. . . . . . . . . . . . . . . . . . . . . . . 47
Wave soldering. . . . . . . . . . . . . . . . . . . . . . . . 47
Manual soldering . . . . . . . . . . . . . . . . . . . . . . 48
Package related soldering information. . . . . . 48
Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . 49
Revision history . . . . . . . . . . . . . . . . . . . . . . . 49
Data sheet status. . . . . . . . . . . . . . . . . . . . . . . 50
Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Disclaimers . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Trademarks . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Contact information . . . . . . . . . . . . . . . . . . . . 50
12.2
12.3
12.4
12.5
13
14
15
16
17
18
19