AT90CAN32 Atmel Corporation, AT90CAN32 Datasheet - Page 246
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AT90CAN32
Manufacturer Part Number
AT90CAN32
Description
Manufacturer
Atmel Corporation
Specifications of AT90CAN32
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 85
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
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
AT90CAN32-15AT
Manufacturer:
LUCENT
Quantity:
18
Company:
Part Number:
AT90CAN32-15AT1
Manufacturer:
MELEXIS
Quantity:
34 000
Company:
Part Number:
AT90CAN32-15AZ
Manufacturer:
IXYS
Quantity:
2 400
Company:
Part Number:
AT90CAN32-15AZ
Manufacturer:
ATMEL
Quantity:
246
Company:
Part Number:
AT90CAN32-15MT
Manufacturer:
Atmel
Quantity:
8 000
Part Number:
AT90CAN32-16AU
Manufacturer:
MICROCHIP/微芯
Quantity:
20 000
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19.5.3
19.5.4
19.5.5
246
AT90CAN32/64/128
Acceptance Filter
MOb Page
CAN Data Buffers
Upon a reception hit (i.e., a good comparison between the ID + RTR + RBn + IDE received and an
IDT+ RTRTAG + RBnTAG + IDE specified while taking the comparison mask into account) the IDT
+ RTRTAG + RBnTAG + IDE received are updated in the MOb (written over the registers).
Figure 19-10. Acceptance Filter Block Diagram
Note:
Every MOb is mapped into a page to save place. The page number is the MOb number. This
page number is set in CANPAGE register. The number 15 is reserved for factory tests.
CANHPMOB register gives the MOb having the highest priority in CANSIT registers. It is format-
ted to provide a direct entry for CANPAGE register. Because CANHPMOB codes CANSIT
registers, it will be only updated if the corresponding enable bits (ENRX, ENTX, ENERR) are
enabled (c.f.
To preserve register allocation, the CAN data buffer is seen such as a FIFO (with address
pointer accessible) into a MOb selection.This also allows to reduce the risks of un-controlled
accesses.
There is one FIFO per MOb. This FIFO is accessed into a MOb page thanks to the CAN mes-
sage register.
internal RxDcan
Examples:
Full filtering: to accept only ID = 0x317 in part A.
- ID MSK = 111 1111 1111
- ID TAG = 011 0001 0111
Partial filtering: to accept ID from 0x310 up to 0x317 in part A.
- ID MSK = 111 1111 1000
- ID TAG = 011 0001 0xxx
No filtering: to accept all ID from 0x000 up to 0x7FF in part A.
- ID MSK = 000 0000 0000
- ID TAG = xxx xxxx xxxx
CANIDT Registers & CANCDMOB (MOb[i])
ID & RB
Figure
19-14).
14(33)
Rx Shift Register (internal)
ID & RB
RTRTAG
Enable
Write
14(33)
13(31) - RB excluded
IDE
RTR
b
b
b
b
b
b
=
IDE
RB excluded
IDMSK
13(31)
1
CANIDM Registers (MOb[i])
13(31)
RTRMSK
IDEMSK
7679H–CAN–08/08
Hit MOb[i]
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