at43usb370 ATMEL Corporation, at43usb370 Datasheet - Page 4

• Manufacturer Part Number: at43usb370
• Description: Usb 2.0 Full-speed Host/function Processor
• Manufacturer: ATMEL Corporation

Pin Description
Table 2. Pin Description for the AT43USB370
4
INTR_OUT
Pin Name
CLK_SEL
DREQ_N
DACK_N
RPD_EN
SELECT
INTR_IN
WAIT_N
READY
VDD18
PROG
MORE
DONE
WE_N
XTAL1
XTAL2
A[7:0]
CS_N
OE_N
BUSY
VCC
VDD
VSS
TP0
TP1
TP2
TP3
LFT
DM
MT
BT
DP
AT43USB370
Power Supply/Gnd
Power Supply/Gnd
Power Supply/Gnd
Power Supply/Gnd
Bi-directional
Bi-directional
Output
Output
Output
Output
Output
Output
Output
Output
Type
Input
Input
Input
Input
Input
Input
Input
Input
Input
Input
Input
Input
Input
Input
Input
Input
Input
Input
Description
ADDRESS BUS - System Address Bus (Least Significant Byte only)
CHIP_SELECT - from System Processor. Active Low
OUTPUT_ENABLE - from System Processor. Active Low
PROCESSOR_SELECT - from System Processor - used to select between USBC and SIC
when PROG is active. Active High
Interrupt to AT43USB370 - from System Processor. Active High
Interrupt from AT43USB370 - to System Processor. Active High
3.3V Power Net
3.3V Power Supply
Ground
1.8V Power Supply - Bus interface IO pads
PROGRAM_LOAD_ENABLE - from System Processor - set program mode to USBC and SIC.
Active High.
PIO Mode Handshake signal from System Processor. Active High
PIO Mode Handshake signal to System Processor. Active High
PIO Mode Handshake signal from System Processor. Active High
BUSY - to System Processor - indicates the AT43USB370 cannot accept external interrupts.
Active High
WAIT - to System Processor. Active Low
WRITE_ENABLE - from System Processor. Active Low
DMA Request - to System Processor. Active Low
DMA Acknowledge - from System Processor. Active Low
BIST- Test Signal
Memory - Test Signal
Test Pin 0
Test Pin 1
Test Pin 2
Test Pin 3
External/PLL Clock Selection - Low selects crystal-PLL clock source while a High uses XTAL1,
bypassing PLL.
Oscillator Input - Input to the inverting oscillator amplifier.
Oscillator Output - Output of the inverting oscillator amplifier.
PLL Loop Filter
D+ (USB Line)
D- (USB Line)
Pull Down Enable
3340BS–USB–4/14/03