AT90PWM3B Atmel Corporation, AT90PWM3B Datasheet - Page 210
AT90PWM3B
Manufacturer Part Number
AT90PWM3B
Description
Manufacturer
Atmel Corporation
Specifications of AT90PWM3B
Flash (kbytes)
8 Kbytes
Pin Count
32
Max. Operating Frequency
16 MHz
Cpu
8-bit AVR
# Of Touch Channels
8
Hardware Qtouch Acquisition
No
Max I/o Pins
27
Ext Interrupts
4
Usb Speed
No
Usb Interface
No
Spi
1
Uart
1
Graphic Lcd
No
Video Decoder
No
Camera Interface
No
Adc Channels
11
Adc Resolution (bits)
10
Adc Speed (ksps)
125
Analog Comparators
3
Resistive Touch Screen
No
Dac Channels
1
Dac Resolution (bits)
10
Temp. Sensor
No
Crypto Engine
No
Sram (kbytes)
0.5
Eeprom (bytes)
512
Self Program Memory
YES
Dram Memory
No
Nand Interface
No
Picopower
No
Temp. Range (deg C)
-40 to 105
I/o Supply Class
2.7 to 5.5
Operating Voltage (vcc)
2.7 to 5.5
Fpu
No
Mpu / Mmu
no / no
Timers
5
Output Compare Channels
16
Input Capture Channels
1
Pwm Channels
12
32khz Rtc
No
Calibrated Rc Oscillator
Yes
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Table 18-12. Examples of UBRR Settings for Commonly Frequencies (Continued)
1.
19. EUSART (Extended USART)
19.1
19.2
210
Baud
Rate
(bps)
2400
4800
9600
14.4k
19.2k
28.8k
38.4k
57.6k
76.8k
115.2k
230.4k
250k
500k
1M
Max.
(1)
UBRR = 0, Error = 0.0%
Features
Overview
AT90PWM2/3/2B/3B
UBRR
312
155
77
51
38
25
19
12
9
6
2
2
–
–
750 kbps
U2X = 0
f
clk
Error
11.3%
-0.2%
-2.5%
-2.7%
-8.9%
0.2%
0.2%
0.2%
0.2%
0.2%
0.2%
0.0%
io
–
–
= 12.0000 MHz
The Extended Universal Synchronous and Asynchronous serial Receiver and Transmitter
(EUSART) provides functionnal extensions to the USART.
•
•
•
•
•
A simplified block diagram of the EUSART Transmitter is shown in
I/O Registers and I/O pins are shown in bold.
Figure 19-1. EUSART Block Diagram
The EUSART is activated with the EUSART bit of EUCSRB register. Until this bit is not set, the
USART will behave as standard USART, all the functionnalities of the EUSART are not
accessible.
The EUSART supports more serial frame formats than the standard USART interface:
Independant bit number configuration for transmit and receive
Supports Serial Frames with 5, 6, 7, 8, 9 or 13, 14, 15, 16, 17 Data Bits and 1 or 2 Stop Bits
Biphase Manchester encoder/decoder (for DALI Communications)
Manchester framing error detection
Bit ordering (MSB first or LSB first)
UBRR
624
312
155
103
77
51
38
25
19
12
6
5
2
–
1.5 Mbps
U2X = 1
Error
-0.2%
-2.5%
-8.9%
0.0%
0.2%
0.2%
0.2%
0.2%
0.2%
0.2%
0.2%
0.0%
0.0%
–
UBRR
383
191
95
63
47
31
23
15
11
7
3
3
1
0
921.6 kbps
U2X = 0
f
clk
Error
-7.8%
-7.8%
-7.8%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
io
= 14.7456 MHz
UBRR
767
383
191
127
95
63
47
31
23
15
1.8432 Mbps
7
6
3
1
U2X = 1
Error
-7.8%
-7.8%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
5.3%
UBRR
416
207
103
68
51
34
25
16
12
8
3
3
1
0
U2X = 0
1 Mbps
Figure
f
clk
Error
-0.1%
-0.8%
-3.5%
0.2%
0.2%
0.6%
0.2%
0.2%
2.1%
0.2%
8.5%
0.0%
0.0%
0.0%
io
= 16.0000 MHz
19-1. CPU accessible
UBRR
832
416
207
138
103
68
51
34
25
16
8
7
3
1
4317J–AVR–08/10
U2X = 1
2 Mbps
Error
-0.1%
-0.1%
-0.8%
-3.5%
0.0%
0.2%
0.2%
0.6%
0.2%
0.2%
2.1%
0.0%
0.0%
0.0%
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