AT43USB326-AU Atmel, AT43USB326-AU Datasheet - Page 36

• 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

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