AT90PWM81-16SN Atmel, AT90PWM81-16SN Datasheet - Page 169
AT90PWM81-16SN
Manufacturer Part Number
AT90PWM81-16SN
Description
IC MCU AVR 8K FLASH ISP 20SOIC
Manufacturer
Atmel
Series
AVR® 90PWM Lightingr
Datasheet
1.AT90PWM81-16MN.pdf
(325 pages)
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
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
AT90PWM81-16SN
Manufacturer:
Atmel
Quantity:
1 500
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13.18.1
13.18.2
13.18.3
13.19 Analog Synchronization
7734P–AVR–08/10
Available Input Mode according to Running Mode
Event Capture
Using the Input Capture Unit
Some Input Modes are not consistent with some Running Modes. So the table below gives the input
modes which are valid according to running modes.
Table 13-6.
The PSCR can capture the value of time (PSCR counter) when a retrigger event or fault event occurs on
PSCR inputs. This value can be read by software in PICRrH/L register.
The main challenge when using the Input Capture unit is to assign enough processor capacity for handling
the incoming events. The time between two events is critical. If the processor has not read the captured
value in the PICR1 Register before the next event occurs, the PICR1 will be overwritten with a new value.
In this case the result of the capture will be incorrect.
When using the Input Capture interrupt, the PICR1 Register should be read as early in the interrupt han-
dler routine as possible. Even though the Input Capture interrupt has relatively high priority, the maximum
interrupt response time is dependent on the maximum number of clock cycles it takes to handle any of the
other interrupt requests.
PSCR generates a signal to synchronize the sample and hold; synchronization is mandatory for
measurements.
Input Mode Number :
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Available Input Modes according to Running Modes
1 Ramp Mode
Valid
Do not use
Do not use
Valid
Do not use
Do not use
Valid
Valid
Valid
Do not use
Valid
Do not use
2 Ramp Mode
Valid
Valid
Valid
Valid
Valid
Valid
Valid
Valid
Valid
Valid
AT90PWM81
4 Ramp Mode
Valid
Valid
Valid
Valid
Valid
Valid
Valid
Valid
Valid
Valid
169
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