AT90CAN32 Automotive Atmel Corporation, AT90CAN32 Automotive Datasheet - Page 244

• Manufacturer Part Number: AT90CAN32 Automotive
• Manufacturer: Atmel Corporation

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

19.5.1.4
19.5.1.5
19.5.2
244
AT90CAN32/64/128
Acceptance Filter
Automatic Reply
Frame Buffer Receive Mode
A reply (data frame) to a remote frame can be automatically sent after reception of the expected
remote frame.
This mode is useful to receive multi frames. The priority between MObs offers a management for
these incoming frames. One set MObs (including non-consecutive MObs) is created when the
MObs are set in this mode. Due to the mode setting, only one set is possible. A frame buffer
completed flag (or interrupt) - BXOK - will rise only when all the MObs of the set will have
received their dedicated CAN frame.
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).
6. All the parameters and data are available in the MOb until a new initialization.
1. Several fields must be initialized before receiving the remote frame:
2. When a remote frame matches, automatically the RTRTAG and the reply valid bit
3. When the transmission of the reply is completed the TXOK flag is set (interrupt).
4. All the parameters and data are available in the MOb until a new initialization.
1. MObs in frame buffer receive mode need to be initialized as MObs in standard receive mode.
2. The MObs are ready to receive data (or a remote) frames when their respective config-
3. When a frame identifier is received on CAN network, the CAN channel scans all the
4. On a hit, the IDT, the IDE and the DLC of the matched MOb are updated from the
5. Once the reception is completed, the data bytes of the received message are stored (not
6. When the reception in the last MOb of the set is completed, the frame buffer completed
7. All the parameters and data are available in the MObs until a new initialization.
– (c.f.
(RPLV) are reset. No flag (or interrupt) is set at this time. Since the CAN data buffer has
not been used by the incoming remote frame, the MOb is then ready to be in transmit
mode without any more setting. The IDT, the IDE, the other tags and the DLC of the
received remote frame are used for the reply.
urations are set (CONMOB).
MObs in receive mode, tries to find the MOb having the highest priority which is
matching.
incoming (frame) values.
for remote frame) in the data buffer of the matched MOb and the RXOK flag is set
(interrupt).
BXOK flag is set (interrupt). BXOK flag can be cleared only if all CONMOB fields of the
set have been re-written before.
Section 19.5.1.3 ”Rx Data & Remote Frame” on page
243)
7682C–AUTO–04/08