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PD72042B Datasheet(PDF) 6 Page - Renesas Technology Corp

Part # PD72042B
Description  LSI DEVICE FOR Inter Equipment BusTM (IEBusTM) PROTOCOL CONTROL
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

PD72042B Datasheet(HTML) 6 Page - Renesas Technology Corp

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µPD72042B
4
Data Sheet S13990EJ3V0DS
CONTENTS
1.
PIN FUNCTIONS .............................................................................................................................
6
1.1
PIN FUNCTIONS .....................................................................................................................................
6
2.
IEBus OPERATION .........................................................................................................................
8
2.1
OVERVIEW ..............................................................................................................................................
8
2.2
IEBus COMMUNICATION PROTOCOL ................................................................................................
9
2.2.1
Bus Mastership Determination (Arbitration) ...............................................................................
10
2.2.2
Communication Mode .................................................................................................................
10
2.2.3
Communication Address .............................................................................................................
11
2.2.4
Broadcast .....................................................................................................................................
11
2.3
TRANSMISSION PROTOCOL ...............................................................................................................
11
2.4
TRANSMISSION DATA (CONTENTS OF THE DATA FIELD) .............................................................
17
2.5
BIT FORMAT ...........................................................................................................................................
21
3.
MICROCOMPUTER INTERFACE .................................................................................................. 22
3.1
TRANSFER METHOD ............................................................................................................................
22
3.2
DATA TRANSFER FORMAT ..................................................................................................................
23
3.2.1
Three-Wire Data Transfer (SEL = 1) ..........................................................................................
23
3.2.2
Two-Wire Data Transfer (SEL = 0) .............................................................................................
25
3.3
CONNECTION TO A MICROCOMPUTER .............................................................................................
27
3.4
STANDBY MODE SETTING AND CANCELLATION ............................................................................
28
3.5
RESET MODE SETTING AND CANCELLATION .................................................................................
28
4.
REGISTERS .................................................................................................................................... 29
5.
EXAMPLE TIMINGS FOR COMMUNICATION .............................................................................. 59
6.
EXAMPLE MICROCOMPUTER PROCESSING FLOW ................................................................ 67
6.1
COMMUNICATION FLAGS ....................................................................................................................
68
6.2
MAIN ROUTINE ......................................................................................................................................
69
6.3
INTERRUPT ROUTINE ...........................................................................................................................
70
6.4
PROCESSING ROUTINES .....................................................................................................................
72
6.4.1
µPD72042B Initial Setting Routine ............................................................................................. 72
6.4.2
Communication Flag Initialization Routine .................................................................................
72
6.4.3
Command Processing Routine ...................................................................................................
73
6.4.4
Master Communication Processing Routine ..............................................................................
73
6.4.5
Slave Data Transmission Processing Routine ...........................................................................
77
6.4.6
Transmission Processing Routine ..............................................................................................
80
6.4.7
Reception Processing Routine ...................................................................................................
81
7.
ELECTRICAL CHARACTERISTICS .............................................................................................. 82
8.
PACKAGE DRAWING ..................................................................................................................... 86


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