at43usb320a ATMEL Corporation, at43usb320a Datasheet - Page 38

• Manufacturer Part Number: at43usb320a
• Description: Full-speed Usb Microcontroller With An Embedded Hub
• Manufacturer: ATMEL Corporation

Timer/Counters
Timer/Counter
Prescaler
Figure 9. Timer/Counter Prescaler
38
CS10
CS11
CS12
CK
T0
T1
AT43USB320A
0
The AT43USB320A provides two general-purpose Timer/Counters - one 8-bit T/C and one 16-
bit T/C. The Timer/Counters have individual prescaling selection from the same 10-bit prescal-
ing timer. Both Timer/Counters 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. For the two Timer/Counters, added selections as CK, external source and
stop, can be selected as clock sources.
Timer/Counter1 Clock Source
TCK1
10-bit T/C Prescaler
CS00
CS01
CS02
0
Timer/Counter0 Clock Source
TCK0
1443E–USB–4/04