ATtiny5 Atmel Corporation, ATtiny5 Datasheet - Page 99

• Manufacturer Part Number: ATtiny5
• Manufacturer: Atmel Corporation

Specifications of ATtiny5

• Flash (kbytes): 0.5 Kbytes
• Pin Count: 6
• Max. Operating Frequency: 12 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 1
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 4
• Ext Interrupts: 4
• Usb Speed: No
• Usb Interface: No
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 4
• Adc Resolution (bits): 8
• Adc Speed (ksps): 15
• Analog Comparators: 1
• Resistive Touch Screen: No
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 0.03
• Self Program Memory: NO
• Dram Memory: No
• Nand Interface: No
• Picopower: No
• Temp. Range (deg C): -40 to 125
• I/o Supply Class: 1.8 to 5.5
• Operating Voltage (vcc): 1.8 to 5.5
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 1
• Output Compare Channels: 2
• Input Capture Channels: 1
• Pwm Channels: 2
• 32khz Rtc: No
• Calibrated Rc Oscillator: Yes

14.3.2
14.3.3
14.3.4
14.3.5
8127E–AVR–11/11
Disabling
Frame Format
Parity Bit Calculation
Supported Characters
Provided that the NVM enable bit has been cleared, the TPI is automatically disabled if the
RESET pin is released to inactive high state or, alternatively, if V
RESET pin.
If the NVM enable bit is not cleared a power down is required to exit TPI programming mode.
See NVMEN bit in
The TPI physical layer supports a fixed frame format. A frame consists of one character, eight
bits in length, and one start bit, a parity bit and two stop bits. Data is transferred with the least
significant bit first.
Figure 14-4. Serial frame format.
Symbols used in
The parity bit is always calculated using even parity. The value of the bit is calculated by doing
an exclusive-or of all the data bits, as follows:
where:
The BREAK character is equal to a 12 bit long low level. It can be extended beyond a bit-length
of 12.
Figure 14-5. Supported characters.
TPIDATA
TPIDATA
TPICLK
TPIDATA
ST:
D0-D7: Data bits (least significant bit sent first)
P:
SP1:
SP2:
P = D0
P:
D0-D7:
IDLE
IDLE
⊗
IDLE
Start bit (always low)
Parity bit (using even parity)
Stop bit 1 (always high)
Stop bit 2 (always high)
D1
Figure
“TPISR – Tiny Programming Interface Status Register” on page
⊗
ST
ST
Parity bit using even parity
Data bits of the character
D2
14-4:
⊗
D3
D0
D0
⊗
D4
D1
D1
⊗
D5
DATA CHARACTER
BREAK CHARACTER
⊗
D6
⊗
D7
D7
⊗
D7
0
P
P
HV
ATtiny4/5/9/10
is no longer applied to the
SP1
SP1
SP2
SP2
107.
IDLE/ST
IDLE/ST
IDLE/ST
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