Техническая Спецификация для Atmel ATmega328P Xplained Mini MEGA328P-XMINI MEGA328P-XMINI
Модели
MEGA328P-XMINI
285
ATmega48A/PA/88A/PA/168A/PA/328/P [DATASHEET]
Atmel-8271H-AVR- ATmega-Datasheet_08/2014
Note:
1.
The default value of SUT1...0 results in maximum start-up time for the default clock source. See
for details.
2.
for
details.
3.
The CKOUT Fuse allows the system clock to be output on PORTB0. See
details.
4.
See
for details.
The status of the Fuse bits is not affected by Chip Erase. Note that the Fuse bits are locked if Lock bit1 (LB1) is
programmed. Program the Fuse bits before programming the Lock bits.
programmed. Program the Fuse bits before programming the Lock bits.
28.2.1 Latching of Fuses
The fuse values are latched when the device enters programming mode and changes of the fuse values will
have no effect until the part leaves Programming mode. This does not apply to the EESAVE Fuse which will
take effect once it is programmed. The fuses are also latched on Power-up in Normal mode.
have no effect until the part leaves Programming mode. This does not apply to the EESAVE Fuse which will
take effect once it is programmed. The fuses are also latched on Power-up in Normal mode.
28.3
Signature Bytes
All Atmel microcontrollers have a three-byte signature code which identifies the device. This code can be read in
both serial and parallel mode, also when the device is locked. The three bytes reside in a separate address
space. For the ATmega48A/PA/88A/PA/168A/PA/328/P the signature bytes are given in
both serial and parallel mode, also when the device is locked. The three bytes reside in a separate address
space. For the ATmega48A/PA/88A/PA/168A/PA/328/P the signature bytes are given in
28.4
Calibration Byte
The ATmega48A/PA/88A/PA/168A/PA/328/P has a byte calibration value for the Internal RC Oscillator. This
byte resides in the high byte of address 0x000 in the signature address space. During reset, this byte is
automatically written into the OSCCAL Register to ensure correct frequency of the calibrated RC Oscillator.
byte resides in the high byte of address 0x000 in the signature address space. During reset, this byte is
automatically written into the OSCCAL Register to ensure correct frequency of the calibrated RC Oscillator.
CKSEL2
2
Select Clock source
0 (programmed)
CKSEL1
1
Select Clock source
1 (unprogrammed)
CKSEL0
0
Select Clock source
0 (programmed)
Table 28-9.
Fuse Low Byte (Continued)
Low Fuse Byte
Bit No
Description
Default Value
Table 28-10.
Device ID
Part
Signature Bytes Address
0x000
0x001
0x002
ATmega48A
0x1E
0x92
0x05
ATmega48PA
0x1E
0x92
0x0A
ATmega88A
0x1E
0x93
0x0A
ATmega88PA
0x1E
0x93
0x0F
ATmega168A
0x1E
0x94
0x06
ATmega168PA
0x1E
0x94
0x0B
ATmega328
0x1E
0x95
0x14
ATmega328P
0x1E
0x95
0x0F