ATA6613 ATMEL Corporation, ATA6613 Datasheet - Page 303

• Manufacturer Part Number: ATA6613
• Description: Ata6613
• Manufacturer: ATMEL Corporation

6.24.2.1
6.24.3
6.24.3.1
6.24.3.2
9111C–AUTO–02/08
Signature Bytes
Latching of Fuses
ATA6612 Signature Bytes
ATA6613 Signature Bytes
Table 6-118. Fuse Low Byte
Note:
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.
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.
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.
Low Fuse Byte
CKDIV8
CKOUT
SUT1
SUT0
CKSEL3
CKSEL2
CKSEL1
CKSEL0
1. 0x000: 0x1E (indicates manufactured by Atmel).
2. 0x001: 0x93 (indicates 8KB Flash memory).
3. 0x002: 0x0A (indicates ATA6612 device when 0x001 is 0x93).
1. 0x000: 0x1E (indicates manufactured by Atmel).
2. 0x001: 0x94 (indicates 16KB Flash memory).
3. 0x002: 0x06 (indicates ATA6613 device when 0x001 is 0x94).
(3)
(4)
1. The default value of SUT1..0 results in maximum start-up time for the default clock source.
2. The default setting of CKSEL3..0 results in internal RC Oscillator @ 8 MHz. See
3. The CKOUT Fuse allows the system clock to be output on PORTB0. See
4. See
See
page 57
on page 60
Table 6-12 on page 57
“System Clock Prescaler” on page 60
for details.
for details.
Bit No
7
6
5
4
3
2
1
0
for details.
Description
Divide clock by 8
Clock output
Select start-up time
Select start-up time
Select Clock source
Select Clock source
Select Clock source
Select Clock source
for details.
ATA6612/ATA6613
0 (programmed)
0 (programmed)
0 (programmed)
Default Value
0 (programmed)
1 (unprogrammed)
1 (unprogrammed)
0 (programmed)
1 (unprogrammed)
“Clock Output Buffer”
(1)
(2)
(2)
(2)
Table 6-11 on
(1)
(2)
303