M38B59MD-XXXFS View Datasheet(PDF) - Renesas Electronics

Part Name

Description

Manufacturer

M38B59MD-XXXFS

8-BIT SINGLE-CHIP MICROCOMPUTER

Renesas Electronics 

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MITSUBISHI MICROCOMPUTERS

38B5 Group

SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

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.

Main address bus

0F6016

Local address bus

0FFF16

FLDC mode register

(0EF416)

FLD data pointer

reload register

(0EF816)

Address

decoder

FLD data pointer

(0EF816)

Timing generator

Main

Local

data bus data bus

FLD/P P20/FLD0

FLD/P P21/FLD1

FLD/P P22/FLD2

FLD/P P23/FLD3

8

FLD/P P24/FLD4

FLD/P P25/FLD5

FLD/P P26/FLD6

FLD/P P27/FLD7

0EFA16 000416

FLD/P P00/FLD8

FLD/P P01/FLD9

FLD/P P02/FLD10

FLD/P P03/FLD11 8

FLD/P P04/FLD12

FLD/P P05/FLD13

FLD/P P06/FLD14

FLD/P P07/FLD15

0EF916 000016

P10/FLD16

P11/FLD17

P12/FLD18

P13/FLD19 8

P14/FLD20

P15/FLD21

P16/FLD22

P17/FLD23

000216

P30/FLD24

P31/FLD25

P32/FLD26

P33/FLD27 8

P34/FLD28

P35/FLD29

P36/FLD30

P37/FLD31

000616

FLD/P P80/FLD32

FLD/P P81/FLD33

FLD/P P82/FLD34

FLD/P P83/FLD35 8

FLD/P P84/FLD36

FLD/P P85/FLD37

FLD/P P86/FLD38

FLD/P P87/FLD39

0EFB16 001016

FLD blanking interrupt

FLD digit interrupt

Fig. 39 Block Diagram for FLD Control Circuit

36

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