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SC28L92 Datasheet(PDF) 73 Page - NXP Semiconductors

Part # SC28L92
Description  3.3 V/5.0 V Dual Universal Asynchronous Receiver/Transmitter (DUART)
PDF  73 Pages
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Manufacturer  NXP [NXP Semiconductors]
Direct Link  http://www.nxp.com
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SC28L92 Datasheet(HTML) 73 Page - NXP Semiconductors

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NXP Semiconductors
SC28L92
3.3 V/5.0 V Dual Universal Asynchronous Receiver/Transmitter
© NXP B.V. 2007.
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: 19 December 2007
Document identifier: SC28L92_7
Please be aware that important notices concerning this document and the product(s)
described herein, have been included in section ‘Legal information’.
19. Contents
1
General description . . . . . . . . . . . . . . . . . . . . . . 1
2
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
3
Ordering information . . . . . . . . . . . . . . . . . . . . . 3
4
Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . 4
5
Pinning information . . . . . . . . . . . . . . . . . . . . . . 6
5.1
Pinning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
5.2
Pin description . . . . . . . . . . . . . . . . . . . . . . . . . 9
6
Functional description . . . . . . . . . . . . . . . . . . 13
6.1
Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . 13
6.1.1
Data bus buffer . . . . . . . . . . . . . . . . . . . . . . . . 13
6.1.2
Operation control . . . . . . . . . . . . . . . . . . . . . . 13
6.1.3
Interrupt control . . . . . . . . . . . . . . . . . . . . . . . 13
6.1.4
FIFO configuration . . . . . . . . . . . . . . . . . . . . . 14
6.1.5
68xxx mode . . . . . . . . . . . . . . . . . . . . . . . . . . 14
6.2
Timing circuits. . . . . . . . . . . . . . . . . . . . . . . . . 14
6.2.1
Crystal clock . . . . . . . . . . . . . . . . . . . . . . . . . . 14
6.2.2
Baud rate generator . . . . . . . . . . . . . . . . . . . . 15
6.2.3
Counter/timer . . . . . . . . . . . . . . . . . . . . . . . . . 15
6.2.4
Timer mode. . . . . . . . . . . . . . . . . . . . . . . . . . . 15
6.2.5
Counter mode . . . . . . . . . . . . . . . . . . . . . . . . . 16
6.2.6
Time-out mode . . . . . . . . . . . . . . . . . . . . . . . . 16
6.2.7
Time-out mode caution . . . . . . . . . . . . . . . . . . 17
6.2.8
Communications channels A and B . . . . . . . . 17
6.2.9
Input port . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
6.2.10
Output port . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
6.3
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
6.3.1
Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
6.3.2
Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
6.3.3
Transmitter reset and disable . . . . . . . . . . . . . 19
6.3.4
Receiver FIFO . . . . . . . . . . . . . . . . . . . . . . . . 20
6.3.5
Receiver status bits . . . . . . . . . . . . . . . . . . . . 20
6.3.6
Receiver reset and disable . . . . . . . . . . . . . . . 20
6.3.7
Watchdog . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
6.3.8
Receiver time-out mode . . . . . . . . . . . . . . . . . 21
6.3.9
Time-out mode caution . . . . . . . . . . . . . . . . . . 22
6.3.10
Multi-drop mode (9-bit or wake-up). . . . . . . . . 22
7
Programming . . . . . . . . . . . . . . . . . . . . . . . . . . 22
7.1
Register overview . . . . . . . . . . . . . . . . . . . . . . 22
7.2
Condensed register bit formats. . . . . . . . . . . . 24
7.3
Register descriptions . . . . . . . . . . . . . . . . . . . 26
7.3.1
Mode registers . . . . . . . . . . . . . . . . . . . . . . . . 26
7.3.1.1
Mode Register 0 channel A (MR0A) . . . . . . . . 26
7.3.1.2
Mode Register 1 channel A (MR1A) . . . . . . . . 28
7.3.1.3
Mode Register 2 channel A (MR2A) . . . . . . . . 29
7.3.1.4
Mode Register 0 channel B (MR0B) . . . . . . . . 32
7.3.1.5
Mode Register 1 channel B (MR1B) . . . . . . . . 32
7.3.1.6
Mode Register 2 channel B (MR2B) . . . . . . . . 32
7.3.2
Clock select registers . . . . . . . . . . . . . . . . . . . 33
7.3.2.1
Clock Select Register channel A (CSRA). . . . 33
7.3.2.2
Clock Select Register channel B (CSRB). . . . 34
7.3.3
Command registers . . . . . . . . . . . . . . . . . . . . 35
7.3.3.1
Command Register channel A (CRA) . . . . . . 35
7.3.3.2
Command Register channel B (CRB) . . . . . . 36
7.3.4
Status registers . . . . . . . . . . . . . . . . . . . . . . . 37
7.3.4.1
Status Register channel A (SRA) . . . . . . . . . . 37
7.3.4.2
Status Register channel B (SRB) . . . . . . . . . . 39
7.3.5
Output Configuration Control Register
(OPCR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
7.3.6
Set Output Port bits Register (SOPR) . . . . . . 41
7.3.7
Reset Output Port bits Register (ROPR) . . . . 42
7.3.8
Output Port Register (OPR) . . . . . . . . . . . . . . 43
7.3.9
Auxiliary Control Register (ACR) . . . . . . . . . . 44
7.3.10
Input Port Change Register (IPCR) . . . . . . . . 45
7.3.11
Interrupt Status Register (ISR). . . . . . . . . . . . 45
7.3.12
Interrupt Mask Register (IMR) . . . . . . . . . . . . 47
7.3.13
Interrupt Vector Register (IVR; 68xxx mode)
or General Purpose register
(GP; 80xxx mode) . . . . . . . . . . . . . . . . . . . . . 48
7.3.14
Counter/timer registers. . . . . . . . . . . . . . . . . . 48
7.4
Output port notes . . . . . . . . . . . . . . . . . . . . . . 49
7.5
The CTS, RTS, CTS enable Tx signals . . . . . 49
8
Limiting values . . . . . . . . . . . . . . . . . . . . . . . . 50
9
Static characteristics . . . . . . . . . . . . . . . . . . . 51
10
Dynamic characteristics . . . . . . . . . . . . . . . . . 54
11
Timing diagrams . . . . . . . . . . . . . . . . . . . . . . . 58
12
Test information. . . . . . . . . . . . . . . . . . . . . . . . 64
13
Package outline . . . . . . . . . . . . . . . . . . . . . . . . 65
14
Soldering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
14.1
Introduction to soldering. . . . . . . . . . . . . . . . . 68
14.2
Wave and reflow soldering . . . . . . . . . . . . . . . 68
14.3
Wave soldering. . . . . . . . . . . . . . . . . . . . . . . . 68
14.4
Reflow soldering. . . . . . . . . . . . . . . . . . . . . . . 69
15
Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . 70
16
Revision history . . . . . . . . . . . . . . . . . . . . . . . 71
17
Legal information . . . . . . . . . . . . . . . . . . . . . . 72
17.1
Data sheet status . . . . . . . . . . . . . . . . . . . . . . 72
17.2
Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
17.3
Disclaimers. . . . . . . . . . . . . . . . . . . . . . . . . . . 72
17.4
Trademarks . . . . . . . . . . . . . . . . . . . . . . . . . . 72
18
Contact information . . . . . . . . . . . . . . . . . . . . 72
19
Contents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73



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