ATtiny167 Automotive Atmel Corporation, ATtiny167 Automotive Datasheet - Page 204

• Manufacturer Part Number: ATtiny167 Automotive
• Manufacturer: Atmel Corporation

Specifications of ATtiny167 Automotive

• Flash (kbytes): 16 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: 2
• Twi (i2c): 1
• Uart: 1
• Lin: 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: 3
• Input Capture Channels: 1
• Pwm Channels: 9
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

17.10 Internal Voltage Reference Output
204
ATtiny87/ATtiny167
The following code example allows to read Signature Row data:
The internal voltage reference is output on XREF pin as described in
turned on
of an external filter capacitor (5 - 10 nF) on XREF pin may be necessary. XREF current load
must be from 1 µA to 100 µA with VCC from 2.7V to 5.5V for XREF = 1.1V and with VCC from
4.5V to 5.5V for XREF = 2.56V.
XREF pin can be coupled to an analog input of the ADC
Table 17-3.
Notes:
XREFEN
.equ TS_GAIN = 0x0007
.equ TS_OFFSET = 0x0005
LDI R30,LOW(TS_GAIN)
LDI R31,HIGH (TS_GAIN)
RCALL Read_signature_row
MOV R17,R16 ; Save R16 result
LDI R30,LOW(TS_OFFSET)
LDI R31,HIGH (TS_OFFSET)
RCALL Read_signature_row
; R16 holds TS_OFFSET and R17 holds TS_GAIN
Read_signature_row:
IN R16,SPMCSR ; Wait for SPMEN ready
SBRC R16,SPMEN ; Exit loop here when SPMCSR is free
RJMP Read_signature_row
LDI R16,((1<<SIGRD)|(1<<SPMEN)) ; We need to set SIGRD and SPMEN
together
OUT SPMCSR,R16 ; and execute the LPM within 3 cycles
LPM R16,Z
RET
1
1
0
(1)
(1)
1.
2.
3. In these configurations, the pin pull-up must be turned off and the pin digital output must be
4. Vcc in range 4.5 - 5.5V.
(See “Voltage Reference Enable Signals and Start-up Time” on page
(1)
See ”Bit 1 – XREFEN: Internal Voltage Reference Output Enable” on page 210.
See ”Bit 7:6 – REFS1:REFS0: Voltage Reference Selection Bits” on page 205.
set in Hi-Z.
Internal Voltage Reference Output
REFS1
x
0
1
(2)
REFS0
1
1
x
(2)
Voltage Reference Output (I
Hi-Z, the pin can be used as AREF input or other alternate
functions.
XREF = 1.1V
XREF = 2.56V
(3)
(3)(4)
(See ”Pin Configuration” on page
load
Table 17-3
100 µA)
7728G–AVR–06/10
53.). Addition
if the ADC is
5.).