ATTINY84-15MZ Atmel, ATTINY84-15MZ Datasheet - Page 22

• Manufacturer Part Number: ATTINY84-15MZ
• Description: MCU AVR 8K FLASH 15MHZ 20-QFN
• Manufacturer: Atmel
• Series: AVR® ATtinyr

Specifications of ATTINY84-15MZ

• Package / Case: 20-QFN Exposed Pad
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Operating Temperature: -40°C ~ 125°C
• Speed: 16MHz
• Number Of I /o: 12
• Eeprom Size: 512 x 8
• Core Processor: AVR
• Program Memory Type: FLASH
• Ram Size: 512 x 8
• Program Memory Size: 8KB (8K x 8)
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Connectivity: USI
• Core Size: 8-Bit
• Processor Series: ATTINY8x
• Core: AVR8
• Data Bus Width: 8 bit
• Data Ram Size: 512 B
• Interface Type: SPI, UART
• Maximum Clock Frequency: 16 MHz
• Number Of Programmable I/os: 12
• 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
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 10 bit, 8 Channel
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

6.5
6.5.1
6.5.2
6.5.3
6.5.4
22
Register Description
Atmel ATtiny24/44/84 [Preliminary]
EEARH – EEPROM Address Register
EEARL – EEPROM Address Register
EEDR – EEPROM Data Register
EECR – EEPROM Control Register
• Bits 7..1 – Res: Reserved Bits
These are reserved bits in the ATtiny24/44/84, and will always read as zero.
• Bit 0 – EEAR8: EEPROM Address
The EEPROM address register, EEARH, specifies the most-significant bit for EEPROM
address in the 512-byte EEPROM space for Tiny84. This bit is reserved in the ATtiny24/44,
and will always read as zero. The initial value of EEAR is undefined. A proper value must be
written before the EEPROM may be accessed.
• Bits 7..0 – EEAR7..0: EEPROM Address
The EEPROM address register, EEARL, specifies the EEPROM address. In the 128-byte
EEPROM space in ATiny24, bit 7 is reserved and will always read as zero. The EEPROM data
bytes are addressed linearly between 0 and 128/256/512. The initial value of EEAR is unde-
fined. A proper value must be written before the EEPROM may be accessed.
• Bits 7..0 – EEDR7..0: EEPROM Data
For the EEPROM write operation the EEDR Register contains the data to be written to the
EEPROM in the address given by the EEAR Register. For the EEPROM read operation, the
EEDR contains the data read out from the EEPROM at the address given by EEAR.
Bit
0x1F (0x3F)
Read/Write
Initial Value
Bit
0x1E (0x3E)
Read/Write
Initial Value
Bit
0x1D (0x3D)
Read/Write
Initial Value
Bit
0x1C (0x3C)
Read/Write
Initial Value
EEAR7
EEDR7
R/W
R/W
R
R
7
–
0
7
X
7
0
7
–
0
EEAR6
EEDR6
R/W
R/W
R
R
6
X
6
0
6
–
0
6
–
0
EEAR5
EEDR5
EEPM1
R/W
R/W
R/W
R
5
X
5
0
X
5
–
0
5
EEAR4
EEDR4
EEPM0
R/W
R/W
R/W
R
4
X
4
0
X
4
–
0
4
EEAR3
EEDR3
EERIE
R/W
R/W
R/W
R
X
3
–
0
3
3
0
3
0
EEAR2
EEDR2
EEMPE
R/W
R/W
R/W
R
X
2
–
0
2
2
0
2
0
EEAR1
EEDR1
EEPE
R/W
R/W
R/W
X
1
–
R
0
1
1
0
1
X
EEAR0
EEDR0
EEAR8
EERE
R/W
R/W
R/W
R/W
X
X
0
0
0
0
0
0
7701D–AVR–09/10
EEARH
EEARL
EEDR
EECR