PD72042B_15 datasheet(76/92 Pages) RENESAS

Part #	PD72042B

Description	LSI DEVICE FOR Inter Equipment BusTM (IEBusTM) PROTOCOL CONTROL

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Manufacturer	RENESAS [Renesas Technology Corp]

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µPD72042B

74

Data Sheet S13990EJ3V0DS

(1) Master transmission processing routine 1

Fig. 6-6 shows the flow of master transmission processing routine 1.

Fig. 6-6

Flow of Master Transmission Processing Routine 1

Start

SAR1

← Slave address (four low-order bits)

SAR2

← Slave address (eight high-order bits)

MCR

← Broadcast bits, number of arbitrations,

and control bits (The MSB is 1.)

Read STR

TEP?

1

0

Read FLG

CEX?

0

1

CMR

← 00010000

Read FLG

CEX?

0

1

TBF

← Number of bytes

in transmission data

I

← 1

I >

N

Y

Read STR

TFL?

1

0

I

← I + 1

TBF

← Transmission data (I-th byte)

1

Read FLG

CEX?

0

End

CMR

← 00001000

MTRQF

← 1

; Waiting for termination of previous command?

; Set clear command for transmission buffer.

; Waiting for termination of processing of

transmission buffer clear command?

; Initialize I.

; Setting tranmission data in TBF completed?

;

; Waiting for termination of

processing of master communication

request command?

Number of bytes

in tranmission data

Set master communication

request command.

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