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SC68C752B Datasheet(PDF) 48 Page - NXP Semiconductors

Part # SC68C752B
Description  5 V, 3.3 V and 2.5 V dual UART, 5 Mbit/s (max.), with 64-byte FIFOs and 68 mode 關P interface
PDF  48 Pages
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Manufacturer  NXP [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo NXP - NXP Semiconductors

SC68C752B Datasheet(HTML) 48 Page - NXP Semiconductors

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NXP Semiconductors
SC68C752B
5 V, 3.3 V and 2.5 V dual UART, 5 Mbit/s (max.), with 64-byte FIFOs
© NXP B.V. 2010.
All rights reserved.
For more information, please visit: http://www.nxp.com
For sales office addresses, please send an email to: salesaddresses@nxp.com
Date of release: 20 January 2010
Document identifier: SC68C752B_4
Please be aware that important notices concerning this document and the product(s)
described herein, have been included in section ‘Legal information’.
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 . . . . . . . . . . . . . . . . . . . . . . . . . 5
6
Functional description . . . . . . . . . . . . . . . . . . . 7
6.1
Trigger levels . . . . . . . . . . . . . . . . . . . . . . . . . . 7
6.2
Hardware flow control . . . . . . . . . . . . . . . . . . . . 7
6.2.1
Auto-RTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
6.2.2
Auto-CTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
6.3
Software flow control . . . . . . . . . . . . . . . . . . . . 9
6.3.1
Receive flow control . . . . . . . . . . . . . . . . . . . . 10
6.3.2
Transmit flow control. . . . . . . . . . . . . . . . . . . . 10
6.3.3
Software flow control example . . . . . . . . . . . . 11
6.3.3.1
Assumptions . . . . . . . . . . . . . . . . . . . . . . . . . . 11
6.4
Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
6.5
Interrupts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
6.5.1
Interrupt mode operation . . . . . . . . . . . . . . . . 14
6.5.2
Polled mode operation . . . . . . . . . . . . . . . . . . 14
6.6
DMA operation . . . . . . . . . . . . . . . . . . . . . . . . 15
6.6.1
Single DMA transfers
(DMA mode 0/FIFO disable). . . . . . . . . . . . . . 15
6.6.1.1
Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
6.6.1.2
Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
6.6.2
Block DMA transfers (DMA mode 1). . . . . . . . 16
6.6.2.1
Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
6.6.2.2
Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
6.7
Sleep mode . . . . . . . . . . . . . . . . . . . . . . . . . . 16
6.8
Break and time-out conditions . . . . . . . . . . . . 17
6.9
Programmable baud rate generator . . . . . . . . 17
7
Register descriptions . . . . . . . . . . . . . . . . . . . 19
7.1
Receiver Holding Register (RHR). . . . . . . . . . 21
7.2
Transmit Holding Register (THR) . . . . . . . . . . 21
7.3
FIFO Control Register (FCR) . . . . . . . . . . . . . 22
7.4
Line Control Register (LCR) . . . . . . . . . . . . . . 23
7.5
Line Status Register (LSR) . . . . . . . . . . . . . . . 24
7.6
Modem Control Register (MCR) . . . . . . . . . . . 25
7.7
Modem Status Register (MSR) . . . . . . . . . . . . 26
7.8
Interrupt Enable Register (IER) . . . . . . . . . . . 27
7.9
Interrupt Identification Register (IIR). . . . . . . . 28
7.10
Enhanced Feature Register (EFR) . . . . . . . . . 29
7.11
Divisor latches (DLL, DLM). . . . . . . . . . . . . . . 29
7.12
Transmission Control Register (TCR). . . . . . . 29
7.13
Trigger Level Register (TLR) . . . . . . . . . . . . . 30
7.14
FIFO ready register . . . . . . . . . . . . . . . . . . . . 30
8
Programmer’s guide . . . . . . . . . . . . . . . . . . . . 31
9
Limiting values . . . . . . . . . . . . . . . . . . . . . . . . 33
10
Static characteristics . . . . . . . . . . . . . . . . . . . 34
11
Dynamic characteristics. . . . . . . . . . . . . . . . . 35
11.1
Timing diagrams. . . . . . . . . . . . . . . . . . . . . . . 36
12
Package outline. . . . . . . . . . . . . . . . . . . . . . . . 41
13
Soldering of SMD packages . . . . . . . . . . . . . . 43
13.1
Introduction to soldering. . . . . . . . . . . . . . . . . 43
13.2
Wave and reflow soldering. . . . . . . . . . . . . . . 43
13.3
Wave soldering . . . . . . . . . . . . . . . . . . . . . . . 43
13.4
Reflow soldering . . . . . . . . . . . . . . . . . . . . . . 44
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



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