AT43USB326-AU Atmel, AT43USB326-AU Datasheet - Page 36
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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Timer/Counter
Timer/Counter
Prescaler
Figure 9. Timer/Counter Prescaler
36
CK
T0
AT43USB326
The AT43USB326 provides one general-purpose 8-bit Timer/Counter (T/C). The
Timer/Counter has prescaling selection from a 10-bit prescaling timer. The Timer/Counter can
either be used as a timer with an internal clock timebase or as a counter with an external pin
connection which triggers the counting.
The four different prescaled selections are: CK/8, CK/64, CK/256 and CK/1024 where CK is
the oscillator clock. Added selections such as CK, external source and stop, can be selected
as clock sources.
10-bit T/C Prescaler
CS00
CS01
CS02
0
Timer/Counter0 Clock Source
TCK0
3313D–USB–04/06
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