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HC705V8GRS/D Datasheet(PDF) 124 Page - NXP Semiconductors

Part # HC705V8GRS/D
Description  The Motorola MC68HC705V8 microcontroller is a custom HC05 based MCU featuring a Message Data Link Controller (MDLC) module and on-chip power regulation.
PDF  172 Pages
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Manufacturer  NXP [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo NXP - NXP Semiconductors

HC705V8GRS/D Datasheet(HTML) 124 Page - NXP Semiconductors

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SECTION 15: MESSAGE DATA LINK CONTROLLER
Page 113
MC68HC705V8 Specification Rev. 2.1
15.4
MDLC PROTOCOL HANDLER
The Protocol Handler is responsible for framing, collision detection, arbitration, CRC
generation/checking, and error detection. The Protocol Handler conforms to SAE J1850 -
Class B Data Communications Network Interface.
15.4.1
OUTLINE
The Protocol Handler contains three main blocks: the State Machine, Rx Shift Register and
Tx Shift Register, as shown below. Each block will now be described in more detail.
Physical Interface
To CPU
Protocol Handler
MUX Interface
CPU Interface
Rx/Tx
Buffers
To J1850 Bus
MDLC
Rx Shift Register
Figure 15-8:
MDLC Protocol Handler Outline
To CPU Interface & Rx/Tx Buffers
State Machine
To MUX Interface
8
Tx Shift Register
8
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com



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