ATMEGA64L-8MI Atmel, ATMEGA64L-8MI Datasheet - Page 186
ATMEGA64L-8MI
Manufacturer Part Number
ATMEGA64L-8MI
Description
IC AVR MCU 64K 8MHZ IND 64-QFN
Manufacturer
Atmel
Series
AVR® ATmegar
Specifications of ATMEGA64L-8MI
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-MLF®, 64-QFN
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
ATMEGA64L-8MI
Manufacturer:
ATMEL/爱特梅尔
Quantity:
20 000
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Asynchronous
Operational Range
2490Q–AVR–06/10
The operational range of the Receiver is dependent on the mismatch between the received bit
rate and the internally generated baud rate. If the Transmitter is sending frames at too fast or too
slow bit rates, or the internally generated baud rate of the receiver does not have a similar (see
Table
The following equations can be used to calculate the ratio of the incoming data rate and internal
receiver baud rate.
D
S
S
S
R
Table 75
that Normal Speed mode has higher toleration of baud rate variations.
F
M
slow
Sum of character size and parity size (D = 5 to 10 bit)
Samples per bit. S = 16 for Normal Speed mode and S = 8 for Double Speed
mode.
First sample number used for majority voting. S
for Double Speed mode.
Middle sample number used for majority voting. S
S
is the ratio of the slowest incoming data rate that can be accepted in relation to the
receiver baud rate. R
accepted in relation to the receiver baud rate.
75) base frequency, the Receiver will not be able to synchronize the frames to the start bit.
M
R
= 5 for Double Speed mode.
and
slow
Table 76
=
------------------------------------------ -
S 1
–
(
D
+
list the maximum Receiver baud rate error that can be tolerated. Note
+
D S ⋅
1
fast
)S
+
is the ratio of the fastest incoming data rate that can be
S
F
F
R
= 8 for Normal Speed and S
M
fast
= 9 for Normal Speed and
=
-----------------------------------
(
D
(
+
D
1
+
)S
ATmega64(L)
2
)S
+
S
M
F
= 4
186
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