ATTINY88-15MZ Atmel, ATTINY88-15MZ Datasheet - Page 18

• Manufacturer Part Number: ATTINY88-15MZ
• Description: IC MCU AVR 8B 8KB FLASH 32QFN
• Manufacturer: Atmel
• Series: AVR® ATtinyr

Specifications of ATTINY88-15MZ

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 16MHz
• Connectivity: I²C, SPI
• Peripherals: Brown-out Detect/Reset, POR, WDT
• Number Of I /o: 28
• Program Memory Size: 8KB (4K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 64 x 8
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 125°C
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

5.3
5.3.1
18
EEPROM Data Memory
ATtiny88 Automotive
EEPROM Read/Write Access
Figure 5-3.
ATtiny88 devices contain 64 bytes of data EEPROM memory, organized as a separate data
space in which single bytes can be read and written. The EEPROM has an endurance of at least
100,000 write/erase cycles. The access between the EEPROM and the CPU is described in the
following, specifying the EEPROM Address Registers, the EEPROM Data Register, and the
EEPROM Control Register.
“Memory Programming” on page 191
in SPI or Parallel Programming mode.
The EEPROM Access Registers are located in I/O space.
The write access time for the EEPROM is given in
lets the user software detect when the next byte can be written. If the user code contains instruc-
tions that write the EEPROM, some precautions must be taken. In heavily filtered power
supplies, V
period of time to run at a voltage lower than specified as minimum for the clock frequency used.
See
situations.
In order to prevent unintentional EEPROM writes, a specific write procedure must be followed.
Refer to
details on this.
When the EEPROM is read, the CPU is halted for four clock cycles before the next instruction is
executed. When the EEPROM is written, the CPU is halted for two clock cycles before the next
instruction is executed.
“Preventing EEPROM Corruption” on page 21
“Atomic Byte Programming” on page 19
CC
Address
clk
is likely to rise or fall slowly on power-up/down. This causes the device for some
On-chip Data SRAM Access Cycles
Data
Data
WR
CPU
RD
Compute Address
T1
Memory Access Instruction
contains a detailed description on EEPROM Programming
Address valid
and
for details on how to avoid problems in these
T2
Table
“Split Byte Programming” on page 19
5-2. A self-timing function, however,
Next Instruction
T3
9157B–AVR–01/10
for