ATmega128RZBV Atmel Corporation, ATmega128RZBV Datasheet - Page 304
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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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28.3.4
28.4
28.4.1
28.4.2
2549N–AVR–05/11
Boundary-scan Specific JTAG Instructions
Boundary-scan Chain
EXTEST; 0x0
IDCODE; 0x1
Figure 28-2. Reset Register
The Boundary-scan Chain has the capability of driving and observing the logic levels on the dig-
ital I/O pins, as well as the boundary between digital and analog logic for analog circuitry having
off-chip connections.
See
The Instruction Register is 4-bit wide, supporting up to 16 instructions. Listed below are the
JTAG instructions useful for Boundary-scan operation. Note that the optional HIGHZ instruction
is not implemented, but all outputs with tri-state capability can be set in high-impedant state by
using the AVR_RESET instruction, since the initial state for all port pins is tri-state.
As a definition in this datasheet, the LSB is shifted in and out first for all Shift Registers.
The OPCODE for each instruction is shown behind the instruction name in hex format. The text
describes which Data Register is selected as path between TDI and TDO for each instruction.
Mandatory JTAG instruction for selecting the Boundary-scan Chain as Data Register for testing
circuitry external to the AVR package. For port-pins, Pull-up Disable, Output Control, Output
Data, and Input Data are all accessible in the scan chain. For Analog circuits having off-chip
connections, the interface between the analog and the digital logic is in the scan chain. The con-
tents of the latched outputs of the Boundary-scan chain is driven out as soon as the JTAG IR-
Register is loaded with the EXTEST instruction.
The active states are:
•
•
•
Optional JTAG instruction selecting the 32-bit ID-Register as Data Register. The ID-Register
consists of a version number, a device number and the manufacturer code chosen by JEDEC.
This is the default instruction after power-up.
Capture-DR: Data on the external pins are sampled into the Boundary-scan Chain
Shift-DR: The Internal Scan Chain is shifted by the TCK input
Update-DR: Data from the scan chain is applied to output pins
“Boundary-scan Chain” on page 305
From Other Internal and
External Reset Sources
From
ClockDR · AVR_RESET
TDI
ATmega640/1280/1281/2560/2561
D
for a complete description.
Q
TDO
To
Internal reset
304
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