HT83B60 datasheet(49/84 Pages) HOLTEK

49 / 84 page

Rev. 1.00

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Rev. 1.00

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HT83B60

Voice Mask MCU

HT83B60

Voice Mask MCU

SCSA

SCKA

SDOA

SDIA

�1

��

�3

�

0 1 � 3 4 5 6 7 8 � 10

�8 �� 30 31 3� 33 34 35 36 37 38 3�

�4-Bit Address

Command

�

Data Out �

Data Out 1

MSB

Hign-Z

READ Command Procedure Timing Diagram

FAST_READ Command

TheFAST_READcommandprovidesahigherspeedtoaccesstheVoiceROMdata.Theaddress

islatchedontherisingedgeoftheSPIclockpin,namelySCKA,andeachbitofthedatawillbe

shiftedoutonthefallingedgeofSCKA.Thefirstaddressbytecanpointtoanylocationinthevoice

ROM.Theaddressisautomaticallyincrementedtothenextaddressaftereachbytedataisshifted

out,sothewholememorycanbereadoutbyasingleFAST_READcommand.Theaddresswill

rolloverto0whenthehighestaddresshasbeenreached.Theaccompanyingflowchartanddiagram

illustratetheFAST_READdatainstructionsettingprocedureandthetimingdiagram.

Clear SCSAB pin =0

Send FAST_READ

command code= 0BH

to SDOA pin

Send 3 bytes address to

SDOA pin

Send 1 byte dummy byte

address to SDOA pin

Set SCSAB pin=1

FAST_READ

Command Procedure

End

Read data on SDIA pin

FAST_READ Command Procedure

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