ATMEGA64L-8AQR Atmel, ATMEGA64L-8AQR Datasheet - Page 111
ATMEGA64L-8AQR
Manufacturer Part Number
ATMEGA64L-8AQR
Description
IC MCU AVR 64K FLASH 64TQFP
Manufacturer
Atmel
Series
AVR® ATmegar
Specifications of ATMEGA64L-8AQR
Core Processor
AVR
Core Size
8-Bit
Speed
8MHz
Connectivity
I²C, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
53
Program Memory Size
64KB (32K x 16)
Program Memory Type
FLASH
Eeprom Size
2K x 8
Ram Size
4K x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 5.5 V
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
64-TQFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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Part Number
Manufacturer
Quantity
Price
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SFIOR – Special
Function IO Register
2490Q–AVR–06/10
• Bit 7 – TSM: Timer/Counter Synchronization Mode
Writing TSM bit to one activates the Timer/Counter Synchronization mode. In this mode, the
value that is written to PSR0 and PSR321 bits is kept, hence keeping the corresponding pres-
caler reset signals asserted. This ensures that the corresponding Timer/Counters are halted and
can be configured to the same value without the risk of one of them advancing during configura-
tion. When the TSM bit written zero, the PSR0 and PSR321 bits are cleared by hardware, and
the Timer/Counters start counting simultaneously.
• Bit 1 – PSR0: Prescaler Reset Timer/Counter0
When this bit is one, the Timer/Counter0 prescaler will be reset. The bit is normally cleared
immediately by hardware. If this bit is written when Timer/Counter0 is operating in Asynchronous
mode, the bit will remain one until the prescaler has been reset. The bit will not be cleared by
hardware if the TSM bit is set.
Bit
0x20 (0x40)
Read/Write
Initial Value
TSM
R/W
7
0
R
6
–
0
R
5
–
0
R
4
–
0
ACME
R/W
3
0
PUD
R/W
2
0
PSR0
R/W
1
0
ATmega64(L)
PSR321
R/W
0
0
SFIOR
111
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