ATTINY48-PU Atmel, ATTINY48-PU Datasheet - Page 199

• Manufacturer Part Number: ATTINY48-PU
• Description: MCU AVR 4K ISP FLASH 1.8V 28-DIP
• Manufacturer: Atmel
• Series: AVR® ATtinyr

Specifications of ATTINY48-PU

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 12MHz
• Connectivity: I²C, SPI
• Peripherals: Brown-out Detect/Reset, POR, WDT
• Number Of I /o: 24
• Program Memory Size: 4KB (2K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 64 x 8
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Data Converters: A/D 6x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 28-DIP (0.300", 7.62mm)
• Processor Series: ATTINY4x
• Core: AVR8
• Data Bus Width: 8 bit
• Data Ram Size: 256 B
• Interface Type: 2-Wire/I2S/SPI
• Maximum Clock Frequency: 12 MHz
• Number Of Programmable I/os: 28
• Number Of Timers: 2
• Maximum Operating Temperature: + 85 C
• Mounting Style: Through Hole
• 3rd Party Development Tools: EWAVR, EWAVR-BL
• Development Tools By Supplier: ATAVRDRAGON, ATSTK500, ATSTK600, ATAVRISP2, ATAVRONEKIT
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 6-ch x 10-bit
• Package: 28PDIP
• Device Core: AVR
• Family Name: ATtiny
• Maximum Speed: 12 MHz
• Operating Supply Voltage: 2.5|3.3|5 V
• For Use With: ATSTK600 - DEV KIT FOR AVR/AVR32ATAVRDRAGON - KIT DRAGON 32KB FLASH MEM AVRATAVRISP2 - PROGRAMMER AVR IN SYSTEM
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

21.2.11
21.2.12
8008G–AVR–04/11
Programming the Lock Bits
Reading Fuse and Lock Bits
Figure 21-5. Programming the FUSES Waveforms
The algorithm for programming the lock bits is as follows (see
194
Lock bits can only be cleared by executing Chip Erase.
The algorithm for reading fuse and lock bits is as follows (see
194
Fuse and lock bit mapping is illustrated in
RESET +12V
• A: Load command “0010 0000”
• C: Load data low byte. Bit n = “0” programs the Lock bit. If LB1 and LB2 have been
• Give WR a negative pulse and wait for RDY/BSY to go high
• A: Load command “0000 0100”
• Set OE to “0”, BS2 to “0” and BS1 to “0”. Low fuse bits can now be read at DATA (“0” means
• Set OE to “0”, BS2 to “1” and BS1 to “1”. High fuse bits can now be read at DATA (“0” means
• Set OE to “0”, BS2 to “1”, and BS1 to “0”. Extended fuse bits can now be read at DATA (“0”
• Set OE to “0”, BS2 to “0” and BS1 to “1”. Lock bits can now be read at DATA (“0” means
• Set OE to “1”
RDY/BSY
programmed, it is not possible to program the Lock Bits by any External Programming mode
programmed)
programmed)
means programmed)
programmed)
PAGEL
for details on command and data loading):
for details on command loading):
CLKI
DATA
XA1
XA0
BS1
BS2
WR
OE
0x40
A
DATA
C
Write Fuse Low byte
XX
0x40
A
Figure
DATA
C
21-6, below.
Write Fuse high byte
XX
“Programming the Flash” on page
“Programming the Flash” on page
0x40
A
ATtiny48/88
DATA
C
Write Extended Fuse byte
XX
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