ATtiny861 Automotive Atmel Corporation, ATtiny861 Automotive Datasheet - Page 23

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ATtiny861 Automotive

Manufacturer Part Number
ATtiny861 Automotive
Description
Manufacturer
Atmel Corporation

Specifications of ATtiny861 Automotive

Flash (kbytes)
8 Kbytes
Pin Count
20
Max. Operating Frequency
16 MHz
Cpu
8-bit AVR
# Of Touch Channels
8
Hardware Qtouch Acquisition
No
Max I/o Pins
16
Ext Interrupts
16
Usb Speed
No
Usb Interface
No
Spi
1
Twi (i2c)
1
Graphic Lcd
No
Video Decoder
No
Camera Interface
No
Adc Channels
11
Adc Resolution (bits)
10
Adc Speed (ksps)
15
Analog Comparators
1
Resistive Touch Screen
No
Temp. Sensor
Yes
Crypto Engine
No
Sram (kbytes)
0.5
Eeprom (bytes)
512
Self Program Memory
YES
Dram Memory
No
Nand Interface
No
Picopower
No
Temp. Range (deg C)
-40 to 150
I/o Supply Class
2.7 to 5.5
Operating Voltage (vcc)
2.7 to 5.5
Fpu
No
Mpu / Mmu
no / no
Timers
2
Output Compare Channels
6
Input Capture Channels
1
Pwm Channels
6
32khz Rtc
No
Calibrated Rc Oscillator
Yes
6.5.2
6.5.3
7753F–AVR–01/11
EEDR – EEPROM Data Register
EECR – EEPROM Control Register
• 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 7 – Res: Reserved Bit
This bit is reserved for future use and will always read as 0 in ATtiny261/461/861. For compati-
bility with future AVR devices, always write this bit to zero. After reading, mask out this bit.
• Bit 6 – Res: Reserved Bit
This bit is reserved in the ATtiny261/461/861 and will always read as zero.
• Bits 5, 4 – EEPM1 and EEPM0: EEPROM Programming Mode Bits
The EEPROM Programming mode bits setting defines which programming action that will be
triggered when writing EEPE. It is possible to program data in one atomic operation (erase the
old value and program the new value) or to split the Erase and Write operations in two different
operations. The Programming times for the different modes are shown in
is set, any write to EEPMn will be ignored. During reset, the EEPMn bits will be reset to 0b00
unless the EEPROM is busy programming.
Table 6-1.
• Bit 3 – EERIE: EEPROM Ready Interrupt Enable
Writing EERIE to one enables the EEPROM Ready Interrupt if the I-bit in SREG is set. Writing
EERIE to zero disables the interrupt. The EEPROM Ready Interrupt generates a constant inter-
rupt when Non-volatile memory is ready for programming.
Bit
0x1D (0x3D)
Read/Write
Initial Value
Bit
0x1C (0x3C)
Read/Write
Initial Value
EEPM1
0
0
1
1
EEPM0
EEPROM Mode Bits
EEDR7
0
1
0
1
R/W
R
7
0
7
0
Programming
EEDR6
R/W
R
6
0
6
0
3.4 ms
1.8 ms
1.8 ms
Time
EEDR5
EEPM1
R/W
R/W
ATtiny261/ATtiny461/ATtiny861
X
5
0
5
Erase Only
Write Only
Operation
Erase and Write in one operation (Atomic Operation)
Reserved for future use
EEDR4
EEPM0
R/W
R/W
4
0
4
X
EEDR3
EERIE
R/W
R/W
3
0
3
0
EEMPE
EEDR2
R/W
R/W
2
0
2
0
EEDR1
EEPE
R/W
R/W
X
1
0
1
Table
EEDR0
EERE
6-1. While EEPE
R/W
R/W
0
0
0
0
EEDR
EECR
23

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