AT90PWM3B Atmel Corporation, AT90PWM3B Datasheet - Page 169
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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16.25.16 PSC 0 Input Capture Register – PICR0H and PICR0L
16.25.17 PSC 1 Input Capture Register – PICR1H and PICR1L
16.25.18 PSC 2 Input Capture Register – PICR2H and PICR2L
4317J–AVR–08/10
• Bit 7 – PCSTn : PSC Capture Software Trig bit (not implemented on AT90PWM2/3)
Set this bit to trigger off a capture of the PSC counter. When reading, if this bit is set it means
that the capture operation was triggered by PCSTn setting otherwise it means that the capture
operation was triggered by a PSC input.
The Input Capture is updated with the PSC counter value each time an event occurs on the
enabled PSC input pin (or optionally on the Analog Comparator output) if the capture function is
enabled (bit PCAEnx in PFRCnx register is set).
The Input Capture Register is 12-bit in size. To ensure that both the high and low bytes are read
simultaneously when the CPU accesses these registers, the access is performed using an 8-bit
temporary high byte register (TEMP). This temporary register is shared by all the other 16-bit or
12-bit registers.
Note for AT90PWM2/3 : This register is read only and a write to this register is not allowed.
Bit
Read/Write
Initial Value
Bit
Read/Write
Initial Value
Bit
Read/Write
Initial Value
PRFMnx3:0
1001b
1010b
1011b
1100b
1101b
1110b
1111b
PCST0
PCST1
PCST2
R
R
R
7
0
7
0
7
0
Description
PSC Input Mode 9: Fixed Frequency Edge Retrigger PSC
Reserved (do not use)
PSC Input Mode 14: Fixed Frequency Edge Retrigger PSC and Disactivate
Output
Reserved (do not use)
R
R
R
6
–
0
6
–
0
6
–
0
R
R
R
5
–
0
5
–
0
5
–
0
R
R
R
4
–
0
4
–
0
4
–
0
PICR0[7:0]
PICR1[7:0]
PICR2[7:0]
R
R
R
3
0
3
0
3
0
AT90PWM2/3/2B/3B
R
R
R
2
0
2
0
2
0
PICR0[11:8]
PICR1[11:8]
PICR2[11:8]
R
R
R
1
0
1
0
1
0
R
R
R
0
0
0
0
0
0
PICR0H
PICR0L
PICR1H
PICR1L
PICR2H
PICR2L
169
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