AT43USB326-AU Atmel, AT43USB326-AU Datasheet - Page 100

• Manufacturer Part Number: AT43USB326-AU
• Description: IC USB KEYBOARD CTRLR 48LQFP
• Manufacturer: Atmel
• Series: AVR®r

Specifications of AT43USB326-AU

• Applications: Keyboard Controller
• Core Processor: AVR
• Program Memory Type: Mask ROM (16 kB)
• Controller Series: AT43USB
• Ram Size: 512 x 8
• Interface: USB
• Number Of I /o: 32
• Voltage - Supply: 4.4 V ~ 5.25 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 48-LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Table of Contents
3313D–USB–04/06
Features................................................................................................ 1
Description ........................................................................................... 1
Architectural Overview........................................................................ 6
The General-purpose Register File .................................................... 7
Functional Description...................................................................... 17
AVR Register Set ............................................................................... 34
Timer/Counter .................................................................................... 36
I/O Ports.............................................................................................. 40
Pin Configuration .................................................................................................. 2
Pin Assignment..................................................................................................... 3
Signal Description................................................................................................. 4
X-, Y- and Z- Registers ......................................................................................... 8
ALU – Arithmetic Logic Unit.................................................................................. 8
Program Memory .................................................................................................. 8
SRAM Data Memory............................................................................................. 9
I/O Memory ......................................................................................................... 14
USB Hub............................................................................................................. 15
On-chip Power Supply ........................................................................................ 17
I/O Pin Characteristics ........................................................................................ 17
Oscillator and PLL .............................................................................................. 17
Reset and Interrupt Handling.............................................................................. 18
Reset Sources .................................................................................................... 20
Power-on Reset .................................................................................................. 21
External Reset .................................................................................................... 22
Watchdog Timer Reset ....................................................................................... 22
Non-USB Related Interrupt Handling.................................................................. 22
External Interrupts .............................................................................................. 26
Interrupt Response Time .................................................................................... 26
USB Interrupt Sources........................................................................................ 28
USB Endpoint Interrupt Sources......................................................................... 29
Status Register and Stack Pointer...................................................................... 34
Sleep Modes....................................................................................................... 35
Timer/Counter Prescaler..................................................................................... 36
8-bit Timer/Counter0........................................................................................... 37
Watchdog Timer ................................................................................................. 39
Port A.................................................................................................................. 41
Port B.................................................................................................................. 42
Port C.................................................................................................................. 43
Port D.................................................................................................................. 44
AT43USB326
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