HD64F3687HV Datasheet, PDF (388/538 Pages) Renesas Technology Corp – Renesas 16-Bit Single-Chip Microcomputer H8 Family/H8/300H Tiny Series

Section 19 EEPROM
The initial value of the slave address code written in the EEPROM is H'00. It can be written in the
range of H'00 to H'07. Be sure to write the data by the byte write method.
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 19.2 Slave Addresses
Bit Bit name
Initial Value Setting Value Remarks
7
Device code D3

1
6
Device code D2

0
5
Device code D1

1
4
Device code D0

0
3
Slave address code A2 0
A2
The initial value can be changed
2
Slave address code A1 0
A1
The initial value can be changed
1
Slave address code A0 0
A0
The initial value can be changed
19.4.7 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 19.3.
Rev.5.00 Nov. 02, 2005 Page 354 of 500
REJ09B0027-0500