3886 datasheet(218/380 Pages) RENESAS

Part #	3886

Description	8-BIT SINGLE-CHIP MICROCOMPUTER

PDF	380 Pages

Scroll/Zoom	100%

Manufacturer	RENESAS [Renesas Technology Corp]

Direct Link	http://www.renesas.com

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218 / 380 page

3886 Group User’s Manual

APPLICATION

2-101

2.5 Multi-master I2C-BUS interface

➄ Transmission of upper data

Confirm correct completion of the upper data transmission. The master returns the NACK toward

the transmitted second-byte data, the upper data. Accordingly, confirm that the last received bit

(LRB bit; bit 0 of address 001416) is “1”.

After that, write dummy data to the I2C data shift register and wait for the interrupt of STOP

condition.

Fig. 2.5.30 Transmission process of upper data

End

S0(address 1216)

← 111111112

Error end

0(ACK)

LRB (address 1416), bit 0 ?

1(NACK)

PIN (address 1416), bit 4 ?

1(stop condition)

0(upper data transmission completed)

S1(address 1416)

← 000100002

Note: Use the branch bit instruction to check bus busy.

• Judgment of bus hold

• ACK confirmation

• Slave receive mode set

• Dummy data write to I2C data shift register

3886 Datasheet(PDF) 218 Page - Renesas Technology Corp