HD6433694 Datasheet, PDF (296/432 Pages) Renesas Technology Corp – 16-Bit Single-Chip Microcomputer H8 Family/H8/300H Tiny Series

The next one bit of the slave address is the R/W code. 0 is for a write and 1 is for a read.
The EEPROM turns to a standby state if the device code is not "1010" or slave address code
doesn’t coincide.
Table 17.2 Slave Addresses
Bit Bit name
Initial
Value
7
Device code D3

6
Device code D2

5
Device code D1

4
Device code D0

3
Slave address code A2 0
2
Slave address code A1 0
1
Slave address code A0 0
Setting
Value Remarks
1
0
1
0
A2
The initial value can be changed
A1
The initial value can be changed
A0
The initial value can be changed
17.4.7 Write Operations
There are two types write operations; byte write operation and page write operation. To initiate
the write operation, input 0 to R/W code following the slave address.
1. Byte Write
A write operation requires an 8-bit data of a 7-bit slave address with R/W code = "0". Then
the EEPROM sends acknowledgement "0" at the ninth bit. This enters the write mode. Then,
two bytes of the memory address are received from the MSB side in the order of upper and
lower. Upon receipt of one-byte memory address, the EEPROM sends acknowledgement "0"
and receives a following a one-byte write data. After receipt of write data, the EEPROM sends
acknowledgement "0". If the EEPROM receives a stop condition, the EEPROM enters an
internally controlled write cycle and terminates receipt of SCL and SDA inputs until
completion of the write cycle. The EEPROM returns to a standby mode after completion of
the write cycle.
The byte write operation is shown in figure 17.3.
Rev. 4.00, 03/04, page 268 of 400