AT43USB325E-AU Atmel, AT43USB325E-AU Datasheet - Page 65

• Manufacturer Part Number: AT43USB325E-AU
• Description: IC USB KEYBOARD CTRLR 64LQFP
• Manufacturer: Atmel
• Series: AVR®r

Specifications of AT43USB325E-AU

• Applications: Keyboard Controller
• Core Processor: AVR
• Program Memory Type: SRAM (16 kB)
• Controller Series: AT43USB
• Ram Size: 512 x 8
• Interface: SPI, 3-Wire Serial
• Number Of I /o: 42
• Voltage - Supply: 4.4 V ~ 5.25 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 64-LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

8.1.2
3355C–USB–4/05
Idle State
The following information describes how the AT43USB325’s USB hardware and firmware oper-
ates during a control transfer between the host and the hub’s or function’s control end-point.
This is the default state from power-up.
Legend:
DATA1/DATA0 = Data packet with DATA1 or DATA2 PID
DATA1(0) = Zero length DATA1 packet
RX_OUT_INT
TX_COMPLETE_INT
Write Status
Response
Control
Write Data
Response
Control
RX_OUT_INT
TX_COMPLETE_INT
(
ANY STABLE STATE
RX_SETUP_INT
TX_COMPLETE_INT
Response
Read Status
Response
Setup
Control
Idle
RX_OUT_INT
)
TX_COMPLETE_INT
Read Data
Response
Control
Response
No-data
Status
AT43USB325
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