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M38B53M4-059FP Datasheet(PDF) 56 Page - Mitsubishi Electric Semiconductor

Part # M38B53M4-059FP
Description  8-BIT SINGLE-CHIP MICROCOMPUTER
PDF  355 Pages
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Manufacturer  MITSUBISHI [Mitsubishi Electric Semiconductor]
Direct Link  http://www.mitsubishichips.com
Logo MITSUBISHI - Mitsubishi Electric Semiconductor

M38B53M4-059FP Datasheet(HTML) 56 Page - Mitsubishi Electric Semiconductor

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38B5 Group User’s Manual
1-40
HARDWARE
FUNCTIONAL DESCRIPTION
FLD Controller
The 38B5 group has fluorescent display (FLD) drive and control cir-
cuits.
The FLD controller consists of the following components:
•40 pins for FLD control pins
•FLDC mode register
•FLD data pointer
•FLD data pointer reload register
•Tdisp time set register
•Toff1 time set register
•Toff2 time set register
•Port P0FLD/port switch register
•Port P2FLD/port switch register
•Port P8FLD/port switch register
•Port P8 FLD output control register
•FLD automatic display RAM (max. 160 bytes)
A gradation display mode can be used for bright/dark display as a
display function.
Fig. 41 Block diagram for FLD control circuit
P20/FLD0
P21/FLD1
P22/FLD2
P23/FLD3
P24/FLD4
P25/FLD5
P26/FLD6
P27/FLD7
FLD/P
FLD/P
FLD/P
FLD/P
FLD/P
FLD/P
FLD/P
FLD/P
000416
0EFA16
8
000016
0EF916
8
P00/FLD8
P01/FLD9
P02/FLD10
P03/FLD11
P04/FLD12
P05/FLD13
P06/FLD14
P07/FLD15
FLD/P
FLD/P
FLD/P
FLD/P
FLD/P
FLD/P
FLD/P
FLD/P
000216
8
P10/FLD16
P11/FLD17
P12/FLD18
P13/FLD19
P14/FLD20
P15/FLD21
P16/FLD22
P17/FLD23
000616
8
P30/FLD24
P31/FLD25
P32/FLD26
P33/FLD27
P34/FLD28
P35/FLD29
P36/FLD30
P37/FLD31
001016
0EFB16
8
P80/FLD32
P81/FLD33
P82/FLD34
P83/FLD35
P84/FLD36
P85/FLD37
P86/FLD38
P87/FLD39
FLD/P
FLD/P
FLD/P
FLD/P
FLD/P
FLD/P
FLD/P
FLD/P
0F6016
0FFF16
Main address bus
Local address bus
Main
data bus
Local
data bus
FLD blanking interrupt
FLD digit interrupt
FLDC mode register
(0EF416)
FLD data pointer
reload register
(0EF816)
FLD data pointer
(0EF816)
Timing generator
Address
decoder



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