upd70f3017ay Renesas Electronics Corporation., upd70f3017ay Datasheet - Page 245

• Manufacturer Part Number: upd70f3017ay
• Description: V850/sa1tm 32-/16-bit Single-chip Microcontroller
• Manufacturer: Renesas Electronics Corporation.

CHAPTER 10
SERIAL INTERFACE FUNCTION
(2) Addresses
The 7 bits of data that follow the start condition are defined as an address.
An address is a 7-bit data segment that is output in order to select one of the slave devices that are connected to
the master device via bus lines. Therefore, each slave device connected via the bus lines must have a unique
address.
The slave devices include hardware that detects the start condition and checks whether or not the 7-bit address
data matches the data values stored in slave address register 0 (SVA0). If the address data matches the SVA0
values, the slave device is selected and communicates with the master device until the master device transmits a
start condition or stop condition.
Figure 10-10. Address
SCL
1
2
3
4
5
6
7
8
9
SDA
AD6
AD5
AD4
AD3
AD2
AD1
AD0
R/W
Address
Note
INTIIC0
Note INTIIC0 is generated if a local address or extension code is received during slave device operation.
The slave address and the eighth bit, which specifies the transfer direction as described in (3) Transfer direction
specification below, are written together to IIC shift register 0 (IIC0) and are then output. Received addresses
are written to IIC0.
The slave address is assigned to the higher 7 bits of IIC0.
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User’s Manual U12768EJ4V1UD