AT43USB320A_04 Datasheet, PDF (11/115 Pages) ATMEL Corporation – Full-speed USB Microcontroller with an Embedded Hub

Table 2. SRAM Organization
Register File
R0
R1
R30
R31
I/O Registers
$00
$01
$3E
$3F
AT43USB320A
Data Address Space
$0000
$0001
$001E
$001F
$0020
$0021
$005E
$005F
Internal SRAM
$0060
$0061
$025E
$045F
USB Registers
$1F00
$1FFE
$1FFF
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1443E–USB–4/04