ATmega16 Atmel Corporation, ATmega16 Datasheet - Page 160
ATmega16
Manufacturer Part Number
ATmega16
Description
Manufacturer
Atmel Corporation
Specifications of ATmega16
Flash (kbytes)
16 Kbytes
Pin Count
44
Max. Operating Frequency
16 MHz
Cpu
8-bit AVR
# Of Touch Channels
16
Hardware Qtouch Acquisition
No
Max I/o Pins
32
Ext Interrupts
3
Usb Speed
No
Usb Interface
No
Spi
1
Twi (i2c)
1
Uart
1
Graphic Lcd
No
Video Decoder
No
Camera Interface
No
Adc Channels
8
Adc Resolution (bits)
10
Adc Speed (ksps)
15
Analog Comparators
1
Resistive Touch Screen
No
Temp. Sensor
No
Crypto Engine
No
Sram (kbytes)
1
Eeprom (bytes)
512
Self Program Memory
YES
Dram Memory
No
Nand Interface
No
Picopower
No
Temp. Range (deg C)
-40 to 85
I/o Supply Class
2.7 to 5.5
Operating Voltage (vcc)
2.7 to 5.5
Fpu
No
Mpu / Mmu
no / no
Timers
3
Output Compare Channels
4
Input Capture Channels
1
Pwm Channels
4
32khz Rtc
Yes
Calibrated Rc Oscillator
Yes
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2466T–AVR–07/10
Table 62. Recommended Maximum Receiver Baud Rate Error for Double Speed Mode (U2X =
1)
The recommendations of the maximum receiver baud rate error was made under the assump-
tion that the receiver and transmitter equally divides the maximum total error.
There are two possible sources for the receivers baud rate error. The receiver’s system clock
(XTAL) will always have some minor instability over the supply voltage range and the tempera-
ture range. When using a crystal to generate the system clock, this is rarely a problem, but for a
resonator the system clock may differ more than 2% depending of the resonators tolerance. The
second source for the error is more controllable. The baud rate generator can not always do an
exact division of the system frequency to get the baud rate wanted. In this case an UBRR value
that gives an acceptable low error can be used if possible.
# (Data+Parity Bit)
10
D
8
9
R
slow
96.00
96.39
96.70
(%)
R
103.90
103.53
103.23
fast
(%)
+3.90/-4.00
+3.53/-3.61
+3.23/-3.30
Max Total
Error (%)
Recommended Max
Receiver Error (%)
ATmega16(L)
±1.5
±1.5
±1.0
160