ATTINY461-15MZ Atmel, ATTINY461-15MZ Datasheet - Page 156

• Manufacturer Part Number: ATTINY461-15MZ
• Description: MCU AVR 4K FLASH 15MHZ 32-QFN
• Manufacturer: Atmel
• Series: AVR® ATtinyr

Specifications of ATTINY461-15MZ

• Package / Case: 32-VQFN Exposed Pad, 32-HVQFN, 32-SQFN, 32-DHVQFN
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Operating Temperature: -40°C ~ 125°C
• Speed: 16MHz
• Number Of I /o: 16
• Eeprom Size: 256 x 8
• Core Processor: AVR
• Program Memory Type: FLASH
• Ram Size: 256 x 8
• Program Memory Size: 4KB (4K x 8)
• Data Converters: A/D 11x10b
• Oscillator Type: Internal
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Connectivity: USI
• Core Size: 8-Bit
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

19.9.1
156
ATtiny261/ATtiny461/ATtiny861
Manufacturing Calibration
Calibration values determined during test are available in the signature row.
The temperature in degrees Celsius can be calculated using the formula:
Where:
a. ADCH & ADCL are the ADC data registers,
b. is the temperature sensor gain
c. TS_OFFSET is the temperature sensor offset correction term
TS_GAIN is the unsigned fixed point 8-bit temperature sensor gain factor in 1/128th units stored
in the signature row.
TS_OFFSET is the signed twos complement temperature sensor offset reading stored in the sig-
nature row.
The table below summarizes the parameter signature row address vs product.
Table 19-3.
The following code example allows to read Signature Row data
T
=
.equ TS_GAIN = 0x0007
.equ TS_OFFSET = 0x0005
--------------------------------------------------------------------------------------------------------------------------------------------------------------------- -
TS_OFFSET
TS_GAIN
LDI R30,LOW(TS_GAIN)
LDI R31,HIGH (TS_GAIN)
RCALL Read_signature_row
MOV R17,R16
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
SBRC R16,SPMEN
RJMP Read_signature_row
LDI R16,((1<<SIGRD)|(1<<SPMEN)) ; We need to set SIGRD and SPMEN
OUT SPMCSR,R16
LPM R16,Z
RET
ADCH << 8 I ADCL
Parameter Signature Row Address vs. Product
; Wait for SPMEN ready
; Exit loop here when SPMCSR is free
ATtiny261
–
TS_GAIN
0x1E
0x1F
; and execute the LPM within 3 cycles
273
+
25 TS_OFFSET
–
; Save R16 result
together
ATtiny461
0x05
0x07
128
+
25
ATtiny861
7753F–AVR–01/11
0x05
0x07