ATmega128RZBV Atmel Corporation, ATmega128RZBV Datasheet - Page 145
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ATmega128RZBV
Manufacturer Part Number
ATmega128RZBV
Description
Manufacturer
Atmel Corporation
Specifications of ATmega128RZBV
Flash (kbytes)
128 Kbytes
Max. Operating Frequency
16 MHz
Max I/o Pins
86
Spi
5
Twi (i2c)
1
Uart
4
Adc Channels
16
Adc Resolution (bits)
10
Adc Speed (ksps)
15
Analog Comparators
1
Crypto Engine
No
Sram (kbytes)
8
Eeprom (bytes)
4096
Operating Voltage (vcc)
1.8 to 3.6
Timers
6
Frequency Band
2.4 GHz
Max Data Rate (mb/s)
0.25
Antenna Diversity
No
External Pa Control
No
Power Output (dbm)
3
Receiver Sensitivity (dbm)
-101
Receive Current Consumption (ma)
16.0
Transmit Current Consumption (ma)
17.0
Link Budget (dbm)
104
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17.7
2549N–AVR–05/11
Output Compare Units
Register has been read. After a change of the edge, the Input Capture Flag (ICFn) must be
cleared by software (writing a logical one to the I/O bit location). For measuring frequency only,
the clearing of the ICFn Flag is not required (if an interrupt handler is used).
The 16-bit comparator continuously compares TCNTn with the Output Compare Register
(OCRnx). If TCNT equals OCRnx the comparator signals a match. A match will set the Output
Compare Flag (OCFnx) at the next timer clock cycle. If enabled (OCIEnx = 1), the Output Com-
pare Flag generates an Output Compare interrupt. The OCFnx Flag is automatically cleared
when the interrupt is executed. Alternatively the OCFnx Flag can be cleared by software by writ-
ing a logical one to its I/O bit location. The Waveform Generator uses the match signal to
generate an output according to operating mode set by the Waveform Generation mode
(WGMn3:0) bits and Compare Output mode (COMnx1:0) bits. The TOP and BOTTOM signals
are used by the Waveform Generator for handling the special cases of the extreme values in
some modes of operation.
A special feature of Output Compare unit A allows it to define the Timer/Counter TOP value (that
is, counter resolution). In addition to the counter resolution, the TOP value defines the period
time for waveforms generated by the Waveform Generator.
Figure 17-4
bit names indicates the device number (n = n for Timer/Counter n), and the “x” indicates Output
Compare unit (A/B/C). The elements of the block diagram that are not directly a part of the Out-
put Compare unit are gray shaded.
Figure 17-4. Output Compare Unit, Block Diagram
shows a block diagram of the Output Compare unit. The small “n” in the register and
OCRnxH Buf. (8-bit)
OCRnxH (8-bit)
See “Modes of Operation” on page 148.
BOTTOM
OCRnx Buffer (16-bit Register)
TEMP (8-bit)
TOP
OCRnx (16-bit Register)
ATmega640/1280/1281/2560/2561
OCRnxL Buf. (8-bit)
OCRnxL (8-bit)
DATA BUS
Waveform Generator
WGMn3:0
=
(16-bit Comparator )
(8-bit)
COMnx1:0
TCNTnH (8-bit)
OCFnx (Int.Req.)
TCNTn (16-bit Counter)
TCNTnL (8-bit)
OCnx
145
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