CDP68HC68S1 데이터 시트보기 (PDF) - Intersil
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CDP68HC68S1 Datasheet PDF : 14 Pages
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CDP68HC68S1
April 1994
Serial Multiplexed Bus Interface
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
CDP68HC68S1E
CDP68HC68S1M
TEMPERATURE
RANGE
PACKAGE
-40oC to +105oC 14 Lead PDIP
-40oC to +105oC 20 Lead SOIC (W)
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.
Pinouts
CD68HC68S1 (PDIP)
TOP VIEW
CLK 1
A2
B3
MODE 4
BUS+ 5
BUS- 6
VSS 7
14 VDD
13 CONTROL
12 IDLE
11 CS
10 SCK
9 REC
8 XMIT
CD68HC68S1 (SOIC)
TOP VIEW
CLK 1
A2
B3
MODE 4
NC 5
NC 6
BUS+ 7
NC 8
BUS- 9
VSS 10
20 VDD
19 CONTROL
18 NC
17 IDLE
16 CS
15 SCK
14 NC
13 NC
12 REC
11 XMIT
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
407-727-9207 | Copyright © Intersil Corporation 1999
6-84
File Number 1918.3
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