AT43USB326-AU Atmel, AT43USB326-AU Datasheet - Page 55
AT43USB326-AU
Manufacturer Part Number
AT43USB326-AU
Description
IC USB KEYBOARD CTRLR 48LQFP
Manufacturer
Atmel
Series
AVR®r
Datasheet
1.AT43USB326-AC.pdf
(102 pages)
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
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Manufacturer
Quantity
Price
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3313D–USB–04/06
Function Endpoint 1, 2 Control Register – FENDP1,2_CR
• Bit 7 – EPEN: Endpoint Enable
0 = Disable endpoint
1 = Enable endpoint
• Bit 6..4 – Reserved
These bits are reserved in the AT43USB326 and will read as zero.
• Bit 3 – DTGLE: Data Toggle
Identifies DATA0 or DATA1 packets. This bit will automatically toggle and requires clearing by
the firmware only in certain special circumstances.
• Bit 2 – EPDIR: Endpoint Direction
0 = Out
1 = In
• Bit 1, 0 – EPTYPE: Endpoint Type
These bits program the type of endpoint.
Initial Value
Read/Write
$1FE4
$1FE3
Bit
EPEN
EPEN
R/W
Bit1
7
0
0
1
1
R
6
–
–
0
R
5
–
–
0
R
4
–
–
0
DTGLE
DTGLE
Bit0
R/W
1
0
1
3
0
EPDIR
EPDIR
R/W
2
0
EPTYPE1
EPTYPE1
Type
Isochronous
Bulk
Interrupt
R/W
1
0
AT43USB326
EPTYPE0
EPTYPE0
R/W
0
0
FENDP1_CR
FENDP2_CR
55
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