HD64F3687HV Datasheet, PDF (392/538 Pages) Renesas Technology Corp – Renesas 16-Bit Single-Chip Microcomputer H8 Family/H8/300H Tiny Series

Section 19 EEPROM
SCL
1 2 34 5 6 7891
8 91
89
1 2 34 5 6 7891
89
SDA
A15
A8
A7
A0
D7
D0
Start
condition
Slave address
R/W
ACK
Upper memory
address
ACK
lower memory
address
ACK
Start
condition
[Legend]
R/W: R/W code (0 is for a write and 1 is for a read),
ACK: acknowledge
Slave address
Figure 19.6 Random Address Read Operation
R ACK Read Data ACK
Stop
conditon
3. Sequential Read
This is a mode to read the data sequentially. Data is sequential read by either a current address
read or a random address read. If the EEPROM receives acknowledgement "0" after 1-byte
read data is output, the read address is incremented and the next 1-byte read data are coming
out. Data is output sequentially by incrementing addresses as long as the EEPROM receives
acknowledgement "0" after the data is output. The address will roll over and returns address
zero if it reaches the last address H'01FF. The sequential read can be continued after roll over.
The sequential read is terminated if the EEPROM receives acknowledgement "1" and a
following stop condition as the same manner as in the random address read.
The condition of a sequential read when the current address read is used is shown in figure
19.7.
SCL
SDA
1 2 34 5 6 7891
89
D7
D0
1
89
D7
D0
Slave address
R/W ACK
Start
condition
[Legend]
R/W: R/W code (0 is for a write and 1 is for a read)
ACK: acknowledge
Read Data ACK
····
Read Data ACK
Stop
conditon
Figure 19.7 Sequential Read Operation (when current address read is used)
Rev.5.00 Nov. 02, 2005 Page 358 of 500
REJ09B0027-0500