SCN2651CC1N28 NXP Semiconductors, SCN2651CC1N28 Datasheet

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SCN2651CC1N28

Manufacturer Part Number
SCN2651CC1N28
Description
Manufacturer
NXP Semiconductors
Datasheet

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Philips Semiconductors
DESCRIPTION
The Philips Semiconductors SCN2651 PCI is a universal
synchronous/asynchronous data communications controller chip
designed for microcomputer systems. It interfaces directly to the
Philips Semiconductors SCN2650 microprocessor and may be used
in a polled or interrupt driven system environment. The SCN2651
accepts programmed instructions from the microprocessor and
supports many serial data communication disciplines, synchronous
and asynchronous, in the full or half-duplex mode.
The PCI serializes parallel data characters received from the
microprocessor for transmission. Simultaneously, it can receive
serial data and convert it into parallel data characters for input to the
microcomputer.
The SCN2651 contains a baud rate generator which can be
programmed to either accept an external clock or to generate
internal transmit or receive clocks. Sixteen different baud rates can
be selected under program control when operating in the internal
clock mode.
The PCI is constructed using Philips Semiconductors n-channel
silicon gate depletion load technology and is packaged in a 28-pin
DIP.
FEATURES
ORDERING CODE
1994 Apr 27
28-Pin Plastic Dual In-Line Package (DIP)
Synchronous operation
– 5- to 8-bit characters
– Single or double SYN operation
– Internal character synchronization
– Transparent or non-transparent mode
– Automatic SYN or DLE-SYN insertion
– SYN or DLE stripping
– Odd, even, or no parity
– Local or remote maintenance loopback mode
– Baud rate: DC to 1Mbps (1X clock)
Asynchronous operation
– 5- to 8-bit characters
– 1, 1-1/2 or 2 stop bits
– Odd, even, or no parity
– Parity, overrun and framing error detection
– Line break detection and generation
– False start bit detection
– Automatic serial echo mode
– Local or remote maintenance loopback mode
– Baud rate: DC to 1Mbps
Programmable communications interface (PCI)
DC to 62.5kbps (16X clock)
DC to 15.625kbps
(1X clock)
(64X clock)
PACKAGES
PACKAGES
1
SCN2651CC1N28
PIN CONFIGURATIONS
OTHER FEATURES
APPLICATIONS
0 C to +70 C
0 C to +70 C
Commercial
Internal or external baud rate clock
16 internal rates – 50 to 19,200 baud
Double buffered transmitter and receiver
Full or half duplex operation
TTL compatible inputs and outputs
Single 5V power supply
No system clock required
28-pin dual in-line package
Intelligent terminals
Network processors
Front-end processors
Remote data concentrators
Computer to computer links
Serial peripherals
V
CC
RxRDY
GND
R/W
RxD
TxC
CE
D6
= 5V +5%
D2
D3
D4
D5
D7
A1
A0
12
14
10
11
13
1
2
3
4
5
6
7
8
9
-40 C to +85 C
-40 C to +85 C
TOP VIEW
Not available
Industrial
DIP
28
27
26
25
24
23
22
21
20
19
18
17
16
15
D1
D0
V
RxC
DTR
RTS
DSR
RESET
BRCLK
TxD
TxEMT/DSCHG
CTS
DCD
TxRDY
CC
Product specification
SCN2651
853-1067 12793
SOT117-2
DWG #
DWG #
SD00049

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SCN2651CC1N28 Summary of contents

Page 1

... No system clock required 28-pin dual in-line package APPLICATIONS Intelligent terminals Network processors Front-end processors Remote data concentrators Computer to computer links Serial peripherals +5% CC Commercial Industrial + + + +85 C SCN2651CC1N28 Not available 1 Product specification SCN2651 RxC DTR RTS DSR RESET BRCLK TxD TxEMT/DSCHG CTS ...

Page 2

Philips Semiconductors Programmable communications interface (PCI) BLOCK DIAGRAM DATA BUS D0–D7 (27, 28 (21) RESET OPERATION CONTROL (12) MODE REGISTER (10) MODE REGISTER (13) COMMAND REGISTER R/W (11) ...

Page 3

Philips Semiconductors Programmable communications interface (PCI) DC ELECTRICAL CHARACTERISTICS SYMBOL SYMBOL PARAMETER PARAMETER Input voltage V Low IL V High IH Output voltage V Low OL V High OH I Input leakage current IL 3-State output leakage current I Data ...

Page 4

Philips Semiconductors Programmable communications interface (PCI) PIN DESCRIPTION Pin No. Symbol 27, 28 5-8 D0 – RESET 12 – R DSR 24 DTR 23 RTS 17 CTS 16 ...

Page 5

Philips Semiconductors Programmable communications interface (PCI) INTERFACE SIGNALS The PCI interface signals can be grouped into two types: the CPU-related signals (shown in Table 2), which interface the SCN2651 to the microprocessor system, and the device-related signals (shown in Table ...

Page 6

Philips Semiconductors Programmable communications interface (PCI) Table 3. Device-Related Signals PIN INPUT/O PIN NAME NO. UTPUT 5.0688MHz clock input to the internal baud rate generator. Not required if external receiver and BRCLK 20 I transmitter clocks are used. Receiver clock. ...

Page 7

Philips Semiconductors Programmable communications interface (PCI) required number of accesses are made, the internal sequencer recycles to point at the first register. The pointers are reset to SYN1 register and mode register RESET input or by performing ...

Page 8

Philips Semiconductors Programmable communications interface (PCI) Table 5. Mode Register 1 (MR1) MR17 MR16 MR15 Parity Type Async: Stop bit length 0 = Odd 00 = Invalid 1 = Even Stop bit 1/2 Stop ...

Page 9

Philips Semiconductors Programmable communications interface (PCI) Table 8. Status Register (SR) SR7 SR6 SR5 Data Set Data Carrier FE/SYN Ready Detect Detect 0 = DSR input 0 = DCD input Async: is high is high 0 = Normal 1 = ...

Page 10

Philips Semiconductors Programmable communications interface (PCI) character has been loaded into the holding register from the receive shift register and is ready to be read by the CPU. If equal to zero, there is no new character in the holding ...

Page 11

Philips Semiconductors Programmable communications interface (PCI) TIMING DIAGRAMS RESET RESET t RES TRANSMIT 1 BIT TIME (1, 16 CLOCK PERIODS) TxC (INPUT) TxD t TxD t TCS TxC (OUTPUT R/W ...

Page 12

Philips Semiconductors Programmable communications interface (PCI) TIMING DIAGRAMS (Continued) TxRDY, TxEMT (Shown for 5-bit characters, no parity, 2 stop bits [in asynchronous mode]) TxC (1X TxD DATA 1 TxEN TxRDY TxEMT CE FOR WRITE OF THR DATA ...

Page 13

Philips Semiconductors Programmable communications interface (PCI) TIMING DIAGRAMS (Continued) RxRDY (Shown for 5-bit characters, no parity, 2 stop bits [in asynchronous mode]) RxC RxD SYN 1 RxEN SYNDET STATUS BIT RxRDY CE FOR READ ...

Page 14

Philips Semiconductors Programmable communications interface (PCI) TYPICAL APPLICATIONS ASYNCHRONOUS INTERFACE TO CRT TERMINAL 8 SCN2651 BRCLK ASYNCHRONOUS INTERFACE TO TELEPHONE LINES 8 SCN2651 BRCLK 1994 Apr 27 ADDRESS BUS CONTROL BUS DATA BUS RxD EIA TO TTL CONVERT (OPT) TxD ...

Page 15

Philips Semiconductors Programmable communications interface (PCI) TYPICAL APPLICATIONS (Continued) SYNCHRONOUS INTERFACE TO TERMINAL OR PERIPHERAL DEVICE ADDRESS BUS CONTROL BUS DATA BUS SCN2651 SYNCHRONOUS INTERFACE TO TELEPHONE LINES SCN2651 1994 Apr 27 RxD TxD SYNCHRONOUS RxC TERMINAL OR PERIPHERAL TxC ...

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