AT90PWM81-16SN Atmel, AT90PWM81-16SN Datasheet - Page 196

• Manufacturer Part Number: AT90PWM81-16SN
• Description: IC MCU AVR 8K FLASH ISP 20SOIC
• Manufacturer: Atmel
• Series: AVR® 90PWM Lightingr

Specifications of AT90PWM81-16SN

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 16MHz
• Connectivity: SPI
• Peripherals: Brown-out Detect/Reset, PWM, WDT
• Number Of I /o: 16
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: FLASH
• Eeprom Size: 512 x 8
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 8x10b; D/A 1x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 105°C
• Package / Case: 20-SOIC (7.5mm Width)
• Data Bus Width: 8 bit
• Data Ram Size: 256 B
• Interface Type: SPI
• Maximum Clock Frequency: 16 MHz
• Number Of Timers: 1
• Maximum Operating Temperature: + 105 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 10 bit, 8 Channel
• On-chip Dac: 10 bit, 1 Channel
• Height: 2.35 mm
• Length: 13 mm
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 2.7 V
• Width: 7.6 mm
• For Use With: ATSTK600-SOIC - STK600 SOCKET/ADAPTER FOR SOIC
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

16.3
16.4
196
Shared pins between Analog Comparator and ADC
Analog Comparator Register Description
AT90PWM81
Figure 16-2.
Several Analog comparators input pins can also be used as ADC inputs, so it is possible to measure the
comparison voltages. However, when a comparator input is selected as the ADC input, a spike occurs dur-
ing the sampling phase of the ADC. This may lead to an unwanted transition on the comparator output. So
it is a safe software practice to devalidate the comparator output before measuring the voltage on one of
the inputs.
Each analog comparator has its own control register.
A dedicated register has been designed to consign the outputs and the flags of the 3 analog comparators.
ACM PM3
ACM PM1
ACM PM2
PSCIN2A
PSCIN 2
PSCINrA
PSCINrB
ACM P1
ACM P2
ACM P3
PSCINr
Comparator PSC links
+
-
+
-
+
-
AC1 EN
AC2 EN
AC3 EN
PSC2
7734P–AVR–08/10
PSCR