AT43USB326-AU Atmel, AT43USB326-AU Datasheet - Page 27
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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Part Number
Manufacturer
Quantity
Price
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3313D–USB–04/06
MCU Control Register – MCUCR
• Bit 7, 6 – Res: Reserved Bits
• Bit 5 – SE: Sleep Enable
The SE bit must be set (1) to make the MCU enter the sleep mode when the SLEEP instruc-
tion is executed. To avoid the MCU entering the sleep mode, unless it is the programmer's
purpose, it is recommended to set the Sleep Enable SE bit just before the execution of the
SLEEP instruction.
• Bit 4 – SM: Sleep Mode
This bit selects between the two available sleep modes. When SM is cleared (zero), Idle Mode
is selected as Sleep Mode. When SM is set (1), Power Down mode is selected as sleep mode.
The AT43USB326 does not support the Idle Mode and SM should always be set to one when
entering the Sleep Mode.
• Bit 3:0 – Res: Reserved Bits
Read/Write
Initial Value
$35 ($55)
Bit
R
7
–
0
R
6
–
0
R/W
SE
5
0
R/W
SM
4
0
R
3
–
0
R
2
–
0
AT43USB326
R
1
–
0
R
0
–
0
MCUCR
27
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