MAX3301EETJ Maxim Integrated, MAX3301EETJ Datasheet - Page 20

• Manufacturer Part Number: MAX3301EETJ
• Description: USB Interface IC
• Manufacturer: Maxim Integrated

Specifications of MAX3301EETJ

• Operating Supply Voltage: 3 V to 4.5 V
• Operating Supply Current: 5 uA

of the MAX3301E/MAX3302E’s slave address, followed
by a 1 (R/W bit). The master then reads one or more
bytes of data. Figure 19 shows the typical read byte
format.
The MAX3301E/MAX3302E allow a master device to
write to sequential registers without repeatedly sending
the slave address and register address each time. The
master first sends the slave address, followed by a 0 to
write data to the MAX3301E/MAX3302E. The
MAX3301E/MAX3302E send an acknowledge bit back
to the master. The master sends the 8-bit register
USB On-the-Go Transceivers and Charge Pumps
20
Figure 19. Read Byte Format
R/W: Read/write (R/W = 1: read; R/W = 0: write)
S: Start condition
RS: Repeated start condition
P: Stop condition
Figure 20. Burst-Mode Write Byte Format
MSB
S
S
______________________________________________________________________________________
A6
A6
A5
A5
SLAVE ADDRESS
A4
SLAVE ADDRESS
A4
DATA (K+1)
Burst-Mode Write Byte Format
(7 BITS)
(8 BITS)
(7 BITS)
RS
A3
A3
S
A6
A2
A2
A6
A5
A1
A1
A5
MAX3301E/MAX3302E RECOGNIZES
A4
SLAVE ADDRESS
LSB
A0
A0
(7 BITS)
A4
SLAVE ADDRESS
A3
R/W
R/W
A
0
(7 BITS)
0
ITS ADDRESS
A3
A2
MSB
A
A
A2
A1
MSB
MSB
A1
A0
UNSUPPORTED REGISTER ADDRESS (K)
A0
R/W
1
REGISTER ADDRESS (K)
DATA (K+2)
R/W
(8 BITS)
0
A
0
(8 BITS)
(8 BITS)
A
0
MSB
address and the MAX3301E/MAX3302E return an
acknowledge bit. The master writes a data byte to the
selected register and receives an acknowledge bit if a
supported register address has been chosen. The reg-
ister address increments and is ready for the master to
send the next data byte. The MAX3301E/MAX3302E
send an acknowledge bit after each data byte. If an
unsupported register is selected, the MAX3301E/
MAX3302E send a NACK to the master and the register
index does not increment (see Figure 20).
MSB
A: Acknowledge bit from the slave
NA: Not-acknowledged bit from the master
Blank: Master transmission
LSB
MAX3301E/MAX3302E SENDS
REGISTER ADDRESS
LSB
LSB
(8 BITS)
DATA
A
AN ACK
(8 BITS)
MSB
A
A
MSB
MSB
MAX3301E/MAX3302E RECOGNIZES A WRITE TO AN
UNSUPPORTED LOCATION, THEN SENDS A NACK
LSB
LSB
NA
DATA (K+N)
1
(8 BITS)
DATA (K)
(8 BITS)
DATA (K)
(8 BITS)
A
0
P
0
LSB
LSB
LSB
A
NA
P
A