AT90PWM216-16SUR Atmel, AT90PWM216-16SUR Datasheet - Page 201
AT90PWM216-16SUR
Manufacturer Part Number
AT90PWM216-16SUR
Description
MCU AVR 16K FLASH 16MHZ 24SOIC
Manufacturer
Atmel
Series
AVR® 90PWM Lightingr
Datasheet
1.AT90PWM216-16SU.pdf
(359 pages)
Specifications of AT90PWM216-16SUR
Core Processor
AVR
Core Size
8-Bit
Speed
16MHz
Connectivity
SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
19
Program Memory Size
16KB (16K x 8)
Program Memory Type
FLASH
Eeprom Size
512 x 8
Ram Size
1K x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 5.5 V
Data Converters
A/D 8x10b; D/A 1x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 105°C
Package / Case
24-SOIC (7.5mm Width)
Processor Series
AT90PWMx
Core
AVR8
3rd Party Development Tools
EWAVR, EWAVR-BL
Development Tools By Supplier
ATAVRDRAGON, ATSTK500, ATSTK600, ATAVRISP2, ATAVRONEKIT, ATAVRFBKIT, ATAVRISP2
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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18.8.3
7710E–AVR–08/10
Asynchronous Operational Range
point marked (A) in
(B). (C) marks a stop bit of full length. The early start bit detection influences the operational
range of the Receiver.
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
bit.
The following equations can be used to calculate the ratio of the incoming data rate and internal
receiver baud rate.
Table 1.
D
S
S
S
R
R
Table 18-2
that Normal Speed mode has higher toleration of baud rate variations.
Table 18-2.
F
M
slow
fast
# (Data+Parity Bit)
is the ratio of the fastest incoming data rate that can be accepted in relation to the
18-2) base frequency, the Receiver will not be able to synchronize the frames to the start
R
10
D
slow
5
6
7
8
9
and
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.
receiver baud rate.
Recommended Maximum Receiver Baud Rate Error for Normal Speed Mode
(U2X = 0)
=
M
Table 18-3
------------------------------------------ -
S 1
= 5 for Double Speed mode.
–
Figure
(
D
+
R
+
D S ⋅
slow
93.20
94.12
94.81
95.36
95.81
96.17
1
18-8. For Double Speed mode the first low level must be delayed to
list the maximum receiver baud rate error that can be tolerated. Note
)S
(%)
+
S
F
R
106.67
105.79
105.11
104.58
104.14
103.78
fast
(%)
Max Total Error (%)
+5.79/-5.88
+5.11/-5.19
+4.58/-4.54
+4.14/-4.19
+3.78/-3.83
+6.67/-6.8
R
fast
AT90PWM216/316
F
= 8 for normal speed and S
=
M
= 9 for normal speed and
-----------------------------------
(
D
(
+
D
1
+
)S
Recommended Max
2
Receiver Error (%)
)S
+
S
M
± 3.0
± 2.5
± 2.0
± 2.0
± 1.5
± 1.5
F
201
= 4
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