ATmega128RZBV Atmel Corporation, ATmega128RZBV Datasheet - Page 33
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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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9.1.6
2549N–AVR–05/11
Using all 64Kbytes Locations of External Memory
the Application software, the external 32Kbytes memory will appear as one linear 32Kbytes
address space from 0x2200 to 0xA1FF. This is illustrated in
Figure 9-7.
Since the External Memory is mapped after the Internal Memory as shown in
28, only 56Kbytes of External Memory is available by default (address space 0x0000 to 0x21FF
is reserved for internal memory). However, it is possible to take advantage of the entire External
Memory by masking the higher address bits to zero. This can be done by using the XMMn bits
and control by software the most significant bits of the address. By setting Port C to output 0x00,
and releasing the most significant bits for normal Port Pin operation, the Memory Interface will
address 0x0000 - 0x2FFF. See the following code examples.
Care must be exercised using this option as most of the memory is masked away.
Address Map with 32Kbytes External Memory
0x0000
0x21FF
0x2200
0x7FFF
0x8000
0x90FF
0x9100
AVR Memory Map
Internal Memory
ATmega640/1280/1281/2560/2561
External
Memory
External 32K SRAM
Figure
9-7.
0x7FFF
0x0000
Figure 9-1 on page
33
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