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CDP68HC68S1M датащи(PDF) 1 Page - Intersil Corporation

номер детали CDP68HC68S1M
подробное описание детали  Serial Multiplexed Bus Interface
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производитель  INTERSIL [Intersil Corporation]
домашняя страница  http://www.intersil.com/cda/home
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CDP68HC68S1M датащи(HTML) 1 Page - Intersil Corporation

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CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
407-727-9207
| Copyright
© Intersil Corporation 1999
CDP68HC68S1
Serial Multiplexed Bus Interface
Description
The CDP68HC6SS1 Serial Bus Interface Chip (SBlC) provides
a means of interfacing in a Small Area Network configuration,
various microcomputers (MCU’s) containing serial ports. Such
MCU’s include the family of 68HC05 microcontrollers. The SBlC
provides a connection from an MCU’s Serial Communication
Interface (asynchronous UART type interface) or Serial Periph-
eral Interface (synchronous) to a medium speed asynchronous
two wire differential signal bus designed to minimize electro-
magnetic interference. This two wire bus forms the network bus
to which all MCU’s are connected (through SBI chips). See Fig-
ure 1. Each MCU operates independently and may be added or
deleted from the bus with little or no impact on bus operation.
Such a bus is ideal for inter-microcomputer communication in
hazardous electrical environments such as automobiles, aircraft
or industrial control systems.
In addition to acting as bus arbitor and interface for microcom-
puter
SCI
port
to
differential
bus
communication,
the
CDP68HC68S1 contains all the circuitry required to convert
and synchronize Non-Return-to-Zero (NRZ) 8-bit data received
on the differential bus and clock the data into a microcomputer’s
SPl port. Likewise, data to be sent by a microcomputer’s SPI
port is converted to asynchronous format by appending start
and stop bits before transmitting to other microcomputers.
Refer to the data sheet for the CDP68HCO5C4 for additional
information regarding CDP68HCO5 microcomputers and their
Serial Communications and Serial Peripheral Interfaces.
The CDP68HC68S1 is supplied in a 14 lead dual-in-line plastic
package (E suffix), and in a 20 lead small outline plastic pack-
age (M suffix).
Operating voltage ranges from 4V to 7V and operating temper-
ature ranges from -40oC to +105oC.
Features
• Differential Bus for Minimal EMl
• High Common Mode Noise Rejection
Ideal for Twisted Pair Wiring
• Data Collision Detection
• Bus Arbitration
• Idle Detection
• Programmable Clock Divider
• Power-On Reset
Ordering Information
PART
NUMBER
TEMPERATURE
RANGE
PACKAGE
CDP68HC68S1E
-40oC to +105oC
14 Lead PDIP
CDP68HC68S1M
-40oC to +105oC
20 Lead SOIC (W)
April 1994
File Number
1918.3
Pinouts
CD68HC68S1 (PDIP)
TOP VIEW
CD68HC68S1 (SOIC)
TOP VIEW
CLK
A
B
MODE
BUS+
BUS-
VSS
VDD
CONTROL
IDLE
CS
SCK
REC
XMIT
1
2
3
4
5
6
7
14
13
12
11
10
9
8
11
12
13
14
15
16
17
18
20
19
10
9
8
7
6
5
4
3
2
1
CLK
A
B
MODE
NC
NC
NC
BUS+
BUS-
VSS
VDD
NC
IDLE
CS
CONTROL
SCK
NC
NC
REC
XMIT


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