AT90PWM81 Atmel Corporation, AT90PWM81 Datasheet - Page 71
AT90PWM81
Manufacturer Part Number
AT90PWM81
Description
Manufacturer
Atmel Corporation
Datasheet
1.AT90PWM161.pdf
(325 pages)
Specifications of AT90PWM81
Flash (kbytes)
8 Kbytes
Pin Count
20
Max. Operating Frequency
16 MHz
Cpu
8-bit AVR
Hardware Qtouch Acquisition
No
Max I/o Pins
20
Ext Interrupts
3
Usb Speed
No
Usb Interface
No
Spi
1
Graphic Lcd
No
Video Decoder
No
Camera Interface
No
Adc Channels
11
Adc Resolution (bits)
10
Adc Speed (ksps)
125
Analog Comparators
3
Resistive Touch Screen
No
Dac Channels
1
Dac Resolution (bits)
10
Temp. Sensor
Yes
Crypto Engine
No
Sram (kbytes)
0.25
Eeprom (bytes)
512
Self Program Memory
YES
Dram Memory
No
Nand Interface
No
Picopower
No
Temp. Range (deg C)
-40 to 125
I/o Supply Class
2.7 to 5.5
Operating Voltage (vcc)
2.7 to 5.5
Fpu
No
Mpu / Mmu
no / no
Timers
1
Output Compare Channels
8
Input Capture Channels
1
Pwm Channels
6
32khz Rtc
No
Calibrated Rc Oscillator
Yes
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9.3
7734P–AVR–08/10
Alternate Port Functions
Most port pins have alternate functions in addition to being general digital I/Os.
port pin control signals from the simplified
riding signals may not be present in all port pins, but the figure serves as a generic description applicable
to all port pins in the AVR microcontroller family.
Figure 9-5.
Note:
Table 9-2
not shown in the succeeding tables. The overriding signals are generated internally in the modules having
the alternate function.
1. WRx, WPx, WDx, RRx, RPx, and RDx are common to all pins within the same port. clk
Pxn
summarizes the function of the overriding signals. The pin and port indexes from
PUD are common to all ports. All other signals are unique for each pin.
Alternate Port Functions
DIEOExn: Pxn DIGITAL INPUT-ENABLE OVERRIDE ENABLE
DIEOVxn: Pxn DIGITAL INPUT-ENABLE OVERRIDE VALUE
DDOExn: Pxn DATA DIRECTION OVERRIDE ENABLE
PUOExn: Pxn PULL-UP OVERRIDE ENABLE
PUOVxn: Pxn PULL-UP OVERRIDE VALUE
DDOVxn: Pxn DATA DIRECTION OVERRIDE VALUE
PVOExn: Pxn PORT VALUE OVERRIDE ENABLE
PVOVxn: Pxn PORT VALUE OVERRIDE VALUE
PTOExn: Pxn, PORT TOGGLE OVERRIDE ENABLE
SLEEP: SLEEP CONTROL
1
0
1
0
1
0
1
0
(1)
Figure 9-2
PUOExn
PUOVxn
DIEOExn
DDOExn
DDOVxn
PVOExn
PVOVxn
DIEOVxn
SLEEP
can be overridden by alternate functions. The over-
SYNCHRONIZER
D
L
SET
CLR
Q
Q
AIOxn: ANALOG INPUT/OUTPUT PIN n ON PORTx
WDx: WRITE DDRx
WRx: WRITE PORTx
PUD: PULLUP DISABLE
WPx: WRITE PINx
clk
DIxn: DIGITAL INPUT PIN n ON PORTx
RDx: READ DDRx
RRx: READ PORTx REGISTER
RPx: READ PORTx PIN
D
PINxn
I/O
CLR
: I/O CLOCK
Q
Q
RESET
RESET
PORTxn
Q
Q
Q
Q
DDxn
CLR
CLR
D
D
AT90PWM81
Figure 9-5
1
0
clk
PUD
WDx
RRx
RDx
DIxn
AIOxn
RPx
I/O
WRx
shows how the
I/O
Figure 9-5
PTOExn
WPx
, SLEEP, and
are
71
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