attiny15l ATMEL Corporation, attiny15l Datasheet - Page 27

• Manufacturer Part Number: attiny15l
• Description: Attiny15l 8-bit Microcontroller With 1k Byte Flash
• Manufacturer: ATMEL Corporation

The Timer/Counter0 Control
Register – TCCR0
1187H–AVR–09/07
Figure 20. Timer/Counter0 Block Diagram
• Bits 7..3 – Res: Reserved Bits
These bits are reserved bits in the ATtiny15L and always read as zero.
• Bits 2, 1, 0 – CS02, CS01, CS00: Clock Select0, Bits 2, 1 and 0
The Clock Select0 bits 2, 1 and 0 define the prescaling source of Timer0.
Table 9. Clock 0 Prescale Select
The Stop condition provides a Timer Enable/Disable function. The prescaled CK modes
are scaled directly from the CK Oscillator clock. If the external pin modes are used for
Timer/Counter0, transitions on PB2/(T0) will clock the counter even if the pin is config-
ured as an output. This feature can give the user SW control of counting.
Bit
$33
Read/Write
Initial Value
CS02
0
0
0
0
1
1
1
1
CS01
R
7
–
0
0
0
1
1
0
0
1
1
R
6
–
0
CS00
0
1
0
1
0
1
0
1
R
5
–
0
T/C CLK SOURCE
Description
Stop, the Timer/Counter0 is stopped.
CK
CK/8
CK/64
CK/256
CK/1024
External Pin T0, falling edge
External Pin T0, rising edge
R
4
–
0
R
3
–
0
CS02
R/W
2
0
CS01
R/W
1
0
ATtiny15L
CS00
R/W
0
0
TCCR0
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