ATTINY861-20MU Atmel, ATTINY861-20MU Datasheet - Page 179
![IC MCU AVR 8K FLASH 20MHZ 32-QFN](/photos/12/32/123217/attiny861-20mu_sml.jpg)
ATTINY861-20MU
Manufacturer Part Number
ATTINY861-20MU
Description
IC MCU AVR 8K FLASH 20MHZ 32-QFN
Manufacturer
Atmel
Series
AVR® ATtinyr
Specifications of ATTINY861-20MU
Core Processor
AVR
Core Size
8-Bit
Speed
20MHz
Connectivity
USI
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
16
Program Memory Size
8KB (4K x 16)
Program Memory Type
FLASH
Eeprom Size
512 x 8
Ram Size
512 x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 5.5 V
Data Converters
A/D 11x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
32-VQFN Exposed Pad, 32-HVQFN, 32-SQFN, 32-DHVQFN
Processor Series
ATTINY8x
Core
AVR8
Data Bus Width
8 bit
Data Ram Size
512 B
Interface Type
2-Wire, SPI, USI
Maximum Clock Frequency
20 MHz
Number Of Programmable I/os
16
Number Of Timers
2
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
3rd Party Development Tools
EWAVR, EWAVR-BL
Development Tools By Supplier
ATAVRDRAGON, ATSTK500, ATSTK600, ATAVRISP2, ATAVRONEKIT, ATAVRMC320
Minimum Operating Temperature
- 40 C
On-chip Adc
10 bit, 11 Channel
Package
32MLF EP
Device Core
AVR
Family Name
ATtiny
Maximum Speed
20 MHz
Operating Supply Voltage
3.3|5 V
For Use With
ATSTK600 - DEV KIT FOR AVR/AVR32ATAVRBC100 - REF DESIGN KIT BATTERY CHARGER770-1007 - ISP 4PORT ATMEL AVR MCU SPI/JTAG
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
ATTINY861-20MU
Manufacturer:
LT
Quantity:
2 140
Part Number:
ATTINY861-20MU
Manufacturer:
ATMEL/爱特梅尔
Quantity:
20 000
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18.7.2
2588E–AVR–08/10
Entering Programming Mode
Table 18-13. Pin Values Used to Enter Programming Mode
The XA1/XA0 pins determine the action executed when the XTAL1 pin is given a positive pulse.
The bit coding is shown in
Table 18-14. XA1 and XA0 Coding
When pulsing WR or OE, the command loaded determines the action executed. The different
Commands are shown in
Table 18-15. Command Byte Bit Coding
The following algorithm puts the device in parallel programming mode:
Command Byte
1. Apply 4.5 - 5.5V between V
2. Set RESET to “0” and toggle XTAL1 at least six times.
3. Set Prog_enable pins listed in
4. Apply 11.5 - 12.5V to RESET. Any activity on Prog_enable pins within 100 ns after
5. Wait at least 50 µs before sending a new command.
XA1
0
0
1
1
ns.
+12V has been applied to RESET, will cause the device to fail entering programming
mode.
1000 0000
0100 0000
0010 0000
0001 0000
0001 0001
0000 1000
0000 0100
0000 0010
0000 0011
PAGEL/BS1
XA1/BS2
XA0
XA0
WR
Pin
0
1
0
1
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
Table
Table
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
18-15.
18-14.
CC
and GND.
Table 18-13 on page 179
Prog_enable[3]
Prog_enable[2]
Prog_enable[1]
Prog_enable[0]
Symbol
to “0000” and wait at least 100
Value
0
0
0
0
179
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