ATTINY87-15XZ Atmel, ATTINY87-15XZ Datasheet - Page 231
![MCU AVR 8K FLASH 15MZ 20-TSSOP](/photos/6/80/68045/313-20-tssop_sml.jpg)
ATTINY87-15XZ
Manufacturer Part Number
ATTINY87-15XZ
Description
MCU AVR 8K FLASH 15MZ 20-TSSOP
Manufacturer
Atmel
Series
AVR® ATtinyr
Datasheet
1.ATTINY167-15MD.pdf
(283 pages)
Specifications of ATTINY87-15XZ
Core Processor
AVR
Core Size
8-Bit
Speed
16MHz
Connectivity
I²C, LIN, SPI, UART/USART, USI
Peripherals
Brown-out Detect/Reset, POR, PWM, Temp Sensor, 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 ~ 125°C
Package / Case
20-TSSOP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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21.7
21.7.1
21.7.2
21.7.3
7728G–AVR–06/10
Parallel Programming
Enter Programming Mode
Considerations for Efficient Programming
Chip Erase
The following algorithm puts the device in parallel programming mode:
The loaded command and address are retained in the device during programming. For effi-
cient programming, the following should be considered.
The Chip Erase will erase the Flash and EEPROM
bits are not reset until the program memory has been completely erased. The Fuse bits are
not changed. A Chip Erase must be performed before the Flash and/or EEPROM are
reprogrammed.
Note:
Load Command “Chip Erase”
1. Apply 4.5 - 5.5V between Vcc and GND.
2. Set RESET to “0” and toggle XTAL1 at least six times.
3. Set the 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.
• The command needs only be loaded once when writing or reading multiple memory
• Skip writing the data value 0xFF, that is the contents of the entire EEPROM (unless the
• Address high byte needs only be loaded before programming or reading a new 256 word
1. Set XA1, XA0 to “1,0 ”. This enables command loading.
2. Set BS1 to “0”.
3. Set DATA to “1000 0000
4. Give XTAL1 a positive pulse. This loads the command.
5. Give WR a negative pulse. This starts the Chip Erase. RDY/BSY goes low.
6. Wait until RDY/BSY goes high before loading a new command.
locations.
EESAVE Fuse is programmed) and Flash after a Chip Erase.
window in Flash or 256 byte EEPROM. This consideration also applies to Signature bytes
reading.
least 100 ns.
+12V has been applied to RESET, will cause the device to fail entering programming
mode.
The EEPRPOM memory is preserved during Chip Erase if the EESAVE Fuse is programmed.
b
”. This is the command for Chip Erase.
Table 21-10 on page 230
(Note:)
ATtiny87/ATtiny167
memories plus Lock bits. The Lock
to “0000
b
” and wait at
231
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