AT90PWM3B Atmel Corporation, AT90PWM3B Datasheet - Page 77
AT90PWM3B
Manufacturer Part Number
AT90PWM3B
Description
Manufacturer
Atmel Corporation
Specifications of AT90PWM3B
Flash (kbytes)
8 Kbytes
Pin Count
32
Max. Operating Frequency
16 MHz
Cpu
8-bit AVR
# Of Touch Channels
8
Hardware Qtouch Acquisition
No
Max I/o Pins
27
Ext Interrupts
4
Usb Speed
No
Usb Interface
No
Spi
1
Uart
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
No
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 105
I/o Supply Class
2.7 to 5.5
Operating Voltage (vcc)
2.7 to 5.5
Fpu
No
Mpu / Mmu
no / no
Timers
5
Output Compare Channels
16
Input Capture Channels
1
Pwm Channels
12
32khz Rtc
No
Calibrated Rc Oscillator
Yes
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11.4
11.4.1
11.4.2
4317J–AVR–08/10
Register Description for I/O-Ports
Port B Data Register – PORTB
Port B Data Direction Register – DDRB
XTAL1: Chip clock Oscillator pin 1. Used for all chip clock sources except internal calibrated RC
Oscillator. When used as a clock pin, the pin can not be used as an I/O pin.
OC0B, Output Compare Match B output: This pin can serve as an external output for the
Timer/Counter0 Output Compare B. The pin has to be configured as an output (DDE1 set “one”)
to serve this function. This pin is also the output pin for the PWM mode timer function.
• RESET/OCD – Bit 0
RESET, Reset pin: When the RSTDISBL Fuse is programmed, this pin functions as a normal I/O
pin, and the part will have to rely on Power-on Reset and Brown-out Reset as its reset sources.
When the RSTDISBL Fuse is unprogrammed, the reset circuitry is connected to the pin, and the
pin can not be used as an I/O pin.
If PE0 is used as a reset pin, DDE0, PORTE0 and PINE0 will all read 0.
Table 11-13
11-5 on page
Table 11-13. Overriding Signals for Alternate Functions in PE2..PE0
Bit
Read/Write
Initial Value
Bit
Read/Write
Signal Name
PUOE
PUOV
DDOE
DDOV
PVOE
PVOV
DIEOE
DIEOV
DI
AIO
relates the alternate functions of Port E to the overriding signals shown in
PORTB7
66.
DDB7
R/W
R/W
7
0
7
PORTB6
PE2/ADC0/
XTAL2
0
0
0
0
0
0
ADC0D
0
Osc Output
ADC0
DDB6
R/W
R/W
6
0
6
PORTB5
DDB5
R/W
R/W
5
0
5
PORTB4
DDB4
R/W
R/W
4
0
4
PE1/OC0B
0
0
0
0
OC0Ben
OC0B
0
0
Osc / Clock input
PORTB3
DDB3
R/W
R/W
3
0
3
AT90PWM2/3/2B/3B
PORTB2
DDB2
R/W
R/W
2
0
2
PORTB1
DDB1
R/W
R/W
1
0
1
PE0/RESET/
OCD
0
0
0
0
0
0
0
0
PORTB0
DDB0
R/W
R/W
0
0
0
PORTB
DDRB
Figure
77
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