AT43USB326-AU Atmel, AT43USB326-AU Datasheet - Page 19

• 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

3313D–USB–04/06
The most typical and general program setup for the Reset and Interrupt Vector Addresses are:
USB related interrupt events are routed to reset vectors 13 and 2 through a separate set of
interrupt, interrupt enable and interrupt mask registers that are mapped to the data SRAM
space. These interrupts must be enabled though their control register bits. In the event an
interrupt is generated, the source of the interrupt is identified by reading the interrupt registers.
The USB frame and transaction related interrupt events, such as Start of Frame interrupt, are
grouped in one set of registers: USB Interrupt Flag Register, USB Interrupt Enable Register
and USB Interrupt Mask Register. The USB Bus reset and suspend/resume are grouped in
another set of registers: Suspend/Resume Register, Suspend/Resume Interrupt Enable Reg-
ister and Suspend/Resume Interrupt Mask Register.
Address
$000
$002
$00E
Overflow
Handler
$018
;
$00d
start
$00e
$00f
$010
$011
...
Labels
MAIN:
...
...
Code
jmp
jmp
jmp
jmp
ldi r16, high (RAMEND)
out SPH, r16
ldi r16, low (RAMEND)
out SPL, r16
<instr> xxx
...
RESET
EXT_INT0
TIM0_OVF
USB_HW
AT43USB326
Comments
; Reset Handler
; IRQ0 Handler
; Timer0
; USB Handler
; Main Program
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