at91rm3400 ATMEL Corporation, at91rm3400 Datasheet - Page 254

• Manufacturer Part Number: at91rm3400
• Description: Atmel Advanced At91 Arm Microcontroller
• Manufacturer: ATMEL Corporation

Figure 84. Master Write with One Byte Internal Address and Multiple Data Bytes
Figure 85. Master Read with One, Two or Three Bytes Internal Address and One Data Byte
Figure 86. Master Read with One Byte Internal Address and Multiple Data Bytes
254
TXCOMP
TWD
TWD
TWD
TXCOMP
TXRDY
RXRDY
TWD
TWD
Three bytes internal address
Two bytes internal address
One byte internal address
S
S
S
AT91RM3400
S
S
Write THR
Write THR
Write START Bit
DADR
DADR
DADR
DADR
DADR
W
W
W
W
W
•
•
•
•
•
•
Figure 87 shows a byte write to an Atmel AT24LC512 EEPROM. This demonstrates the use of
internal addresses to access the device.
A
A
A
S = Start
P = Stop
W = Write/read
A = Acknowledge
DADR= Device Address
IADR = Internal Address
A
A
IADR(23:16)
IADR(15:8)
IADR(7:0)
IADR(7:0)
IADR(7:0)
A
A
A
A
A
IADR(15:8)
IADR(7:0)
S
S
DADR
DATA
DADR
A
A
R
Write THR
A
IADR(7:0)
S
A
R
DADR
A
DATA
A
DATA
DATA
R
S
Write THR
Read RHR
A
A
N
DADR
DATA
A
P
Write STOP Bit
DATA
DATA
DATA
R
N
1790A–ATARM–11/03
Read RHR
P
N
N
A
A
P
P
P