ATA6616-P3QW Atmel, ATA6616-P3QW Datasheet - Page 123

• Manufacturer Part Number: ATA6616-P3QW
• Description: TXRX MULTICHIP MOD LIN SIP 38QFN
• Manufacturer: Atmel
• Series: AVR® ATA66 LIN-SBCr

Specifications of ATA6616-P3QW

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 16MHz
• Connectivity: I²C, LIN, SPI, UART/USART, USI
• Peripherals: Brown-out Detect/Reset, POR, PWM, Temp Sensor, WDT
• Number Of I /o: 16
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: FLASH
• Eeprom Size: 512 x 8
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 11x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 38-VQFN
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

4.11.10
9132D–AUTO–12/10
Timer/Counter0 Prescaler
Figure 4-41. Prescaler for Timer/Counter0
The clock source for Timer/Counter0 is named clk
main system I/O clock clk
nously clocked from the XTAL oscillator or XTAL1 pin. This enables use of Timer/Counter0 as
a Real Time Counter (RTC).
A crystal can then be connected between the XTAL1 and XTAL2 pins to serve as an indepen-
dent clock source for Timer/Counter0.
A external clock can also be used using XTAL1 as input. Setting AS0 and EXCLK enables this
configuration.
For Timer/Counter0, the possible prescaled selections are: clk
clk
selected. Setting the PSR0 bit in GTCCR resets the prescaler. This allows the user to operate
with a predictable prescaler.
• During asynchronous operation, the synchronization of the interrupt flags for the
XTAL2
XTAL1
T0S
a) Write any value to either of the registers OCR0A or TCCR0A.
b) Wait for the corresponding Update Busy Flag to be cleared.
c) Read TCNT0.
asynchronous timer takes 3 processor cycles plus one timer cycle. The timer is therefore
advanced by at least one before the processor can read the timer value causing the setting
of the interrupt flag. The Output Compare pin is changed on the timer clock and is not
synchronized to the processor clock.
/128, clk
T0S
Oscillator
/256, and clk
EXCLK
PSRn
CSn0
CSn1
CSn2
clk
IO
0
1
I/O
. By setting the AS0 bit in ASSR, Timer/Counter0 is asynchro-
ASn
T0S
0
1
/1024. Additionally, clk
clk
TnS
Atmel ATA6616/ATA6617
Clear
T0S
TIMER/COUNTERn CLOCK SOURCE
. clk
T0S
0
T0S
10-BIT T/C PRESCALER
is by default connected to the
as well as 0 (stop) may be
clk
T0S
Tn
/8, clk
T0S
/32, clk
T0S
/64,
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