MAX3301EETJ Maxim Integrated, MAX3301EETJ Datasheet - Page 22

• 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

USB On-the-Go Transceivers and Charge Pumps
The MAX3301E/MAX3302E allow a master device to
read data from sequential registers with the burst-mode
read byte protocol (see Figure 21). The master device
first sends the slave address, followed by a 0. The
MAX3301E/MAX3302E then sends an acknowledge bit.
Next, the master sends the register address to the
MAX3301E/MAX3302E, which then generates another
acknowledge bit. The master then sends a stop condi-
tion to the MAX3301E/MAX3302E. Next, the master
sends a start condition, followed by the MAX3301E/
MAX3302E’s slave address, and then a 1 to indicate a
read command. The MAX3301E/MAX3302E then sends
data to the master device, one byte at a time. The mas-
ter sends an acknowledge bit to the MAX3301E/
MAX3302E after each data byte, and the register
address of the MAX3301E/MAX3302E increments after
each byte. This continues until the master sends a stop
22
Table 6. Register Map
* When writing to an unused register, the device generates a NACK and the register index does not increment.
Special function 1
Special function 2
Unused*/Special
Interrupt source
Interrupt-enable
Interrupt-enable
______________________________________________________________________________________
Interrupt latch
Falling edge
Rising edge
REGISTER
Revision ID
Product ID
Vendor ID
Function 2
Control 1
Control 2
Unused*
Unused*
Burst-Mode Read Byte Format
MEMORY ADDRESS
0Bh (clear)
0Dh (clear)
05h (clear)
07h (clear)
0Fh (clear)
11h (clear)
13h (clear)
17h (clear)
08h (read)
0Ch (set)
04h (set)
06h (set)
0Ah (set)
0Eh (set)
10h (set)
12h (set)
16h (set)
00h, 01h
02h, 03h
14h, 15h
18h–Fh
09h
Read only. The contents of registers 00h and 01h are 6Ah and 0Bh, respectively.
Read only. The contents of registers 02h and 03h are 01h and 33h, respectively.
Sets operating modes, maximum data rate, and direction of data transfer.
Controls D+/D- pullup/pulldown resistor connections, ID_IN state, and V
behavior.
Read only.
Not used.
Indicates which interrupts have occurred.
Enables interrupts for high-to-low transitions.
Enables interrupts for low-to-high transitions.
MAX3301E: Not used.
MAX3302E: Alternate register addresses for special-function register 2. This
register is also accessible from 16h and 17h.
Enables hardware/software control of the MAX3301E's behavior, interrupt activity,
and operating modes.
Read only. The contents of registers 14h and 15h are 77h and 41h, respectively.
Sets operating modes, INT output configuration, D+/D- behavior in audio mode,
and TRM source.
Not used.
condition. If an unsupported register address is encoun-
tered, the MAX3301E/MAX3302E send a byte of zeros.
There are two read/write control registers. Control regis-
ter 1 (Table 7) sets operating modes, sets the data rate,
and controls the direction of data transfer. Control regis-
ter 2 (Table 8) connects the D+/D- pullup or pulldown
resistors, sets the V
and grounds ID_IN. The control registers have two
addresses that implement write-one-set and write-one-
clear features for each of these registers. Writing a 1 to
the set address sets that bit to 1. Writing a 1 to the clear
address resets that bit to 0. Writing a 0 to either address
has no effect on the bits.
DESCRIPTION
BUS
charge/discharge conditions,
Control Registers
Registers
BUS