Datasheet

283
6120F–ATARM–03-Oct-06
AT91SAM7X512/256/128 Preliminary
Figure 29-8. Master Read with One Byte Internal Address and Multiple Data Bytes
•S = Start
•P = Stop
•W = Write
• R = Read
• A = Acknowledge
• N = Not Acknowledge
• DADR= Device Address
• IADR = Internal Address
Figure 29-9 below shows a byte write to an Atmel AT24LC512 EEPROM. This demonstrates the
use of internal addresses to access the device.
Figure 29-9. Internal Address Usage
A
IADR(7:0) A
S DADR W
S DADR R A DATA A
DATA N P
TXCOMP
Write START Bit
RXRDY
Write STOP Bit
Read RHR
Read RHR
TWD
S
T
A
R
T
M
S
B
Device
Address
0
L
S
B
R
/
W
A
C
K
M
S
B
W
R
I
T
E
A
C
K
A
C
K
L
S
B
A
C
K
FIRST
WORD ADDRESS
SECOND
WORD ADDRESS DATA
S
T
O
P