AT90CAN32 Automotive Atmel Corporation, AT90CAN32 Automotive Datasheet - Page 150
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AT90CAN32 Automotive
Manufacturer Part Number
AT90CAN32 Automotive
Description
Manufacturer
Atmel Corporation
Datasheets
1.AT90CAN128_AUTOMOTIVE.pdf
(431 pages)
2.AT90CAN128_AUTOMOTIVE.pdf
(16 pages)
3.AT90CAN128_AUTOMOTIVE.pdf
(225 pages)
Specifications of AT90CAN32 Automotive
Flash (kbytes)
32 Kbytes
Pin Count
64
Max. Operating Frequency
16 MHz
Cpu
8-bit AVR
# Of Touch Channels
16
Hardware Qtouch Acquisition
No
Max I/o Pins
53
Ext Interrupts
8
Usb Speed
No
Usb Interface
No
Spi
1
Twi (i2c)
1
Uart
2
Can
1
Graphic Lcd
No
Video Decoder
No
Camera Interface
No
Adc Channels
8
Adc Resolution (bits)
10
Adc Speed (ksps)
15
Analog Comparators
1
Resistive Touch Screen
No
Temp. Sensor
No
Crypto Engine
No
Sram (kbytes)
2
Eeprom (bytes)
1024
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
4
Output Compare Channels
8
Input Capture Channels
2
Pwm Channels
7
32khz Rtc
Yes
Calibrated Rc Oscillator
Yes
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14.6.1
14.6.2
14.7
150
Modes of Operation
AT90CAN32/64/128
Compare Output Function
Compare Output Mode and Waveform Generation
Figure 14-5. Compare Match Output Unit, Schematic
The general I/O port function is overridden by the Output Compare (OC2A) from the Waveform
Generator if either of the COM2A1:0 bits are set. However, the OC2A pin direction (input or out-
put) is still controlled by the Data Direction Register (DDR) for the port pin. The Data Direction
Register bit for the OC2A pin (DDR_OC2A) must be set as output before the OC2A value is vis-
ible on the pin. The port override function is independent of the Waveform Generation mode.
The design of the Output Compare pin logic allows initialization of the OC2A state before the
output is enabled. Note that some COM2A1:0 bit settings are reserved for certain modes of
operation.
The Waveform Generator uses the COM2A1:0 bits differently in normal, CTC, and PWM modes.
For all modes, setting the COM2A1:0 = 0 tells the Waveform Generator that no action on the
OC2A Register is to be performed on the next compare match. For compare output actions in
the non-PWM modes refer to
on page
A change of the COM2A1:0 bits state will have effect at the first compare match after the bits are
written. For non-PWM modes, the action can be forced to have immediate effect by using the
FOC2A strobe bits.
The mode of operation, i.e., the behavior of the Timer/Counter and the Output Compare pins, is
defined by the combination of the Waveform Generation mode (WGM21:0) and Compare Output
mode (COM2A1:0) bits. The Compare Output mode bits do not affect the counting sequence,
while the Waveform Generation mode bits do. The COM2A1:0 bits control whether the PWM
output generated should be inverted or not (inverted or non-inverted PWM). For non-PWM
modes the COM2A1:0 bits control whether the output should be set, cleared, or toggled at a
compare match
157, and for phase correct PWM refer to
See “8-bit Timer/Counter Register Description” on page 156.
(See “Compare Match Output Unit” on page
COMnx1
COMnx0
FOCnx
clk
I/O
Table 14-2 on page
Waveform
Generator
D
D
D
PORT
DDR
OCnx
Table 14-4 on page
157. For fast PWM mode, refer to
Q
Q
Q
149.).
1
0
158.
7682C–AUTO–04/08
OCnx
Pin
Table 14-3
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