sc16c850iet NXP Semiconductors, sc16c850iet Datasheet - Page 53

• Manufacturer Part Number: sc16c850iet
• Description: Sc16c850 2.5 V To 3.3 V Uart, 5 Mbit/s Max. With 128-byte Fifos, Infrared Irda , And 16 Mode Or 68 Mode Parallel Bus Interface
• Manufacturer: NXP Semiconductors

NXP Semiconductors
17. Contents
1
2
3
4
5
5.1
5.2
6
6.1
6.2
6.3
6.4
6.4.1
6.4.2
6.5
6.6
6.7
6.8
6.9
6.10
6.11
6.11.1
6.11.2
6.12
6.13
6.13.1
6.13.2
6.13.3
6.13.3.1
6.13.3.2
7
7.1
7.2
7.2.1
7.2.2
7.3
7.3.1
7.4
7.5
7.6
7.7
7.8
7.9
7.10
General description . . . . . . . . . . . . . . . . . . . . . . 1
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Ordering information . . . . . . . . . . . . . . . . . . . . . 2
Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Pinning information . . . . . . . . . . . . . . . . . . . . . . 5
Functional description . . . . . . . . . . . . . . . . . . . 9
Register descriptions . . . . . . . . . . . . . . . . . . . 20
Pinning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Pin description . . . . . . . . . . . . . . . . . . . . . . . . . 6
UART selection . . . . . . . . . . . . . . . . . . . . . . . . . 9
Extended mode (128-byte FIFO) . . . . . . . . . . 10
Internal registers. . . . . . . . . . . . . . . . . . . . . . . 10
FIFO operation . . . . . . . . . . . . . . . . . . . . . . . . 11
32-byte FIFO mode. . . . . . . . . . . . . . . . . . . . . 11
128-byte FIFO mode. . . . . . . . . . . . . . . . . . . . 11
Hardware flow control . . . . . . . . . . . . . . . . . . . 12
Software flow control . . . . . . . . . . . . . . . . . . . 12
Special character detect . . . . . . . . . . . . . . . . . 13
Interrupt priority and time-out interrupts . . . . . 13
Programmable baud rate generator . . . . . . . . 14
Loopback mode . . . . . . . . . . . . . . . . . . . . . . . 16
Sleep mode. . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Conditions to enter Sleep mode . . . . . . . . . . . 18
Conditions to resume normal operation . . . . . 18
Low power feature . . . . . . . . . . . . . . . . . . . . . 18
RS-485 features . . . . . . . . . . . . . . . . . . . . . . . 19
Auto RS-485 RTS control . . . . . . . . . . . . . . . . 19
RS-485 RTS inversion . . . . . . . . . . . . . . . . . . 19
Auto 9-bit mode (RS-485). . . . . . . . . . . . . . . . 19
Normal Multi-drop mode . . . . . . . . . . . . . . . . . 19
Auto address detection . . . . . . . . . . . . . . . . . . 20
Transmit (THR) and Receive (RHR)
Holding Registers . . . . . . . . . . . . . . . . . . . . . . 23
Interrupt Enable Register (IER) . . . . . . . . . . . 23
IER versus Transmit/Receive FIFO
interrupt mode operation. . . . . . . . . . . . . . . . . 24
IER versus Receive/Transmit FIFO
polled mode operation . . . . . . . . . . . . . . . . . . 24
FIFO Control Register (FCR) . . . . . . . . . . . . . 25
FIFO mode . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Interrupt Status Register (ISR) . . . . . . . . . . . . 26
Line Control Register (LCR) . . . . . . . . . . . . . . 27
Modem Control Register (MCR) . . . . . . . . . . . 28
Line Status Register (LSR) . . . . . . . . . . . . . . . 29
Modem Status Register (MSR). . . . . . . . . . . . 30
Extra Feature Control Register (EFCR) . . . . . 31
Scratchpad Register (SPR) . . . . . . . . . . . . . . 31
2.5 V to 3.3 V UART with 128-byte FIFOs and IrDA encoder/decoder
7.11
7.12
7.13
7.14
7.15
7.16
7.17
7.18
7.19
7.20
7.21
7.22
7.23
8
9
10
10.1
11
12
12.1
12.2
12.3
12.4
13
14
15
15.1
15.2
15.3
15.4
16
17
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.
For more information, please visit: http://www.nxp.com
For sales office addresses, please send an email to: [e-mail]
Limiting values . . . . . . . . . . . . . . . . . . . . . . . . 38
Static characteristics . . . . . . . . . . . . . . . . . . . 38
Dynamic characteristics . . . . . . . . . . . . . . . . . 39
Package outline . . . . . . . . . . . . . . . . . . . . . . . . 47
Soldering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . 51
Revision history . . . . . . . . . . . . . . . . . . . . . . . 51
Legal information . . . . . . . . . . . . . . . . . . . . . . 52
Contact information . . . . . . . . . . . . . . . . . . . . 52
Contents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Divisor Latch (DLL and DLM). . . . . . . . . . . . . 31
Transmit FIFO Level Count
(TXLVLCNT). . . . . . . . . . . . . . . . . . . . . . . . . . 31
Receive FIFO Level Count
(RXLVLCNT) . . . . . . . . . . . . . . . . . . . . . . . . . 31
Enhanced Feature Register
(EFR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Transmit Interrupt Level Register
(TXINTLVL) . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Receive Interrupt Level Register
(RXINTLVL) . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Flow Control Trigger Level High
(FLWCNTH) . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Flow Control Trigger Level Low
(FLWCNTL) . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Clock Prescaler (CLKPRES) . . . . . . . . . . . . . 34
RS-485 Turn-around time delay
(RS485TIME) . . . . . . . . . . . . . . . . . . . . . . . . . 35
Advanced Feature Control Register 2
(AFCR2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Advanced Feature Control Register 1
(AFCR1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
SC16C850 external reset condition and
software reset. . . . . . . . . . . . . . . . . . . . . . . . . 37
Timing diagrams. . . . . . . . . . . . . . . . . . . . . . . 41
Introduction to soldering. . . . . . . . . . . . . . . . . 49
Wave and reflow soldering . . . . . . . . . . . . . . . 49
Wave soldering. . . . . . . . . . . . . . . . . . . . . . . . 49
Reflow soldering. . . . . . . . . . . . . . . . . . . . . . . 50
Data sheet status . . . . . . . . . . . . . . . . . . . . . . 52
Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Disclaimers. . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Trademarks . . . . . . . . . . . . . . . . . . . . . . . . . . 52
SC16C850
Document identifier: SC16C850_1
Date of release: 10 January 2008
All rights reserved.