at43312 ATMEL Corporation, at43312 Datasheet - Page 2

• Manufacturer Part Number: at43312
• Description: Self- And Bus- Powered Usb Hub Controller
• Manufacturer: ATMEL Corporation

Block Diagram
Note:
Figure 1. Device Pins
2
This document assumes that the reader is familiar with the Universal Serial Bus and therefore only describes the unique fea-
tures of the AT43312 chip. For detailed information about the USB and its operation, the reader should refer to the Universal
Serial Bus Specification Version 1.0, January 19, 1996.
CONTROLLER
ENDPOINT 0
ENDPOINT 1
HUB
AT43312
BUS/SELF
OSC1
VCCA
PSC2
VREF
VCC3
VCC5
GND
DM0
DP0
LFT
SERIAL INTERFACE
PORT1
ENGINE
CONTROLLER
INTERFACE
REPEATER
ENGINE
SERIAL
OSC
PLL
HUB
HUB
&
To downstream
PORT2
devices
PORT4
PORT3
PORT4
PORT2
REPEATER
Upstream port
HUB
Port0
PORT3
DP4
DM4
OVL4
PWR4
STAT4
DP3
DM3
OVL3
PWR3
STAT3
DP2
DM2
OVL2
PWR2
STAT2
DP1
DM1
OVL1
PWR1
STAT1
PORT4