ATTINY4313-MU Atmel, ATTINY4313-MU Datasheet - Page 183

• Manufacturer Part Number: ATTINY4313-MU
• Description: IC MCU AVR 4K FLASH 20QFN
• Manufacturer: Atmel
• Series: AVR® ATtinyr

Specifications of ATTINY4313-MU

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 18
• Program Memory Size: 4KB (2K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 256 x 8
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 20-VQFN Exposed Pad, 20-HVQFN, 20-SQFN, 20-DHVQFN
• Processor Series: ATtiny
• Core: AVR
• Data Bus Width: 8 bit
• Data Ram Size: 256 B
• Interface Type: SPI, USART, USI
• Maximum Clock Frequency: 20 MHz
• Number Of Programmable I/os: 18
• Number Of Timers: 2
• Operating Supply Voltage: 3.3 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Operating Temperature Range: - 40 C to + 85 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Data Converters: -
• Lead Free Status / Rohs Status: Details

20.6
20.6.1
8246A–AVR–11/09
Parallel Programming
Enter Programming Mode
Table 20-10. Pin Values Used to Enter Programming Mode
Table 20-11. XA1 and XA0 Coding
When pulsing WR or OE, the command loaded determines the action executed. The different
Commands are shown in
Table 20-12. Command Byte Bit Coding
The following algorithm puts the device in Parallel programming mode:
1. Set Prog_enable pins listed in
2. Apply 4.5 - 5.5V between V
3. Ensure that V
XA1
Command Byte
to 0V.
0
0
1
1
1000 0000
0100 0000
0010 0000
0001 0000
0001 0001
0000 1000
0000 0100
0000 0010
0000 0011
XA1
XA0
BS1
WR
Pin
XA0
0
1
0
1
CC
reaches at least 1.8V within the next 20 µs.
Table
Action when XTAL1 is Pulsed
Load Flash or EEPROM Address (High or low address byte
determined by BS1).
Load Data (High or Low data byte for Flash determined by BS1).
Load Command
No Action, Idle
Command Executed
Chip Erase
Write Fuse bits
Write Lock bits
Write Flash
Write EEPROM
Read Signature Bytes and Calibration byte
Read Fuse and Lock bits
Read Flash
Read EEPROM
20-12.
CC
Table 20-10 on page 183
and GND.
Prog_enable[3]
Prog_enable[2]
Prog_enable[1]
Prog_enable[0]
Symbol
to “0000”, RESET pin and V
Value
0
0
0
0
CC
183