ATTIny2313-16MI ATMEL Corporation, ATTIny2313-16MI Datasheet - Page 82

• Manufacturer Part Number: ATTIny2313-16MI
• Description: 8-bit AVR Microcontroller with 2K Bytes In-System Programmable Flash
• Manufacturer: ATMEL Corporation

General Timer/Counter
Control Register – GTCCR
82
ATtiny2313/V
the edge detector uses sampling, the maximum frequency of an external clock it can
detect is half the sampling frequency (Nyquist sampling theorem). However, due to vari-
ation of the system clock frequency and duty cycle caused by Oscillator source (crystal,
resonator, and capacitors) tolerances, it is recommended that maximum frequency of an
external clock source is less than f
An external clock source can not be prescaled.
Figure 38. Prescaler for Timer/Counter0 and Timer/Counter1
Note:
• Bits 7..1 – Res: Reserved Bits
These bits are reserved bits in the ATtiny2313 and will always read as zero.
• Bit 0 – PSR10: Prescaler Reset Timer/Counter1 and Timer/Counter0
When this bit is one, Timer/Counter1 and Timer/Counter0 prescaler will be Reset. This
bit is normally cleared immediately by hardware. Note that Timer/Counter1 and
Timer/Counter0 share the same prescaler and a reset of this prescaler will affect both
timers.
Bit
Read/Write
Initial Value
PSR10
clk
T0
T1
I/O
Synchronization
Synchronization
1. The synchronization logic on the input pins (
—
R
7
0
R
6
–
0
R
5
–
0
clk_I/O
clk
Clear
T1
/2.5.
R
4
–
0
R
3
–
0
T1/T0)
is shown in Figure 37.
R
2
–
0
(1)
—
R
1
0
clk
PSR10
R/W
T0
2543C–AVR–12/03
0
0
GTCCR