ATA5771 ATMEL Corporation, ATA5771 Datasheet - Page 214

• Manufacturer Part Number: ATA5771
• Manufacturer: ATMEL Corporation

19.3.1
19.3.2
19.4
162
Page Size
ATtiny24/44/84
Signature Bytes
Calibration Byte
All Atmel microcontrollers have a three-byte signature code which identifies the device. This
code can be read in both serial and High-voltage Programming mode, also when the device is
locked.
Signature bytes can also be read by the device firmware. See section
Signature Data from Software” on page
The three signature bytes reside in a separate address space called the device signature imprint
table. The signature data for ATtiny24/44/84 is given in
Table 19-7.
The device signature imprint table of ATtiny24/44/84 contains one byte of calibration data for the
internal oscillator, as shown in
written into the OSCCAL register to ensure correct frequency of the calibrated oscillator.
Calibration bytes can also be read by the device firmware. See section
Signature Data from Software” on page
Table 19-8.
Table 19-9.
Part
ATtiny24
ATtiny44
ATtiny84
Device
ATtiny24
ATtiny44
ATtiny84
Device
ATtiny24
ATtiny44
ATtiny84
1K words
(2K bytes)
2K words
(4K bytes)
4K words
(8K bytes)
EEPROM Size
Device Signature Bytes
No. of Words in a Page and No. of Pages in the Flash
No. of Words in a Page and No. of Pages in the EEPROM
Flash Size
128 bytes
256 bytes
512 bytes
Signature Byte 0
Page Size
Page Size
Table 19-6 on page
16 words
32 words
32 words
4 bytes
4 bytes
4 bytes
0x1E
0x1E
0x1E
155.
155.
PCWORD
PCWORD
EEA[1:0]
EEA[1:0]
EEA[1:0]
PC[3:0]
PC[4:0]
PC[4:0]
Signature Byte 1
161. During reset, this byte is automatically
Table
No. of Pages
No. of Pages
0x91
0x92
0x93
128
128
19-7.
64
64
32
64
“Reading Lock, Fuse and
“Reading Lock, Fuse and
PCPAGE
PCPAGE
EEA[6:2]
EEA[7:2]
EEA[8:2]
PC[10:5]
PC[11:5]
PC[9:4]
Signature Byte 0
0x0C
0x0B
0x07
8006G–AVR–01/08
EEAMSB
PCMSB
10
11
9
6
7
8