atmega32c1 ATMEL Corporation, atmega32c1 Datasheet - Page 177
atmega32c1
Manufacturer Part Number
atmega32c1
Description
Atmega32m1 Automotive 8-bit Avr Microcontroller With 32k/64k Bytes In-system Programmable Flash
Manufacturer
ATMEL Corporation
Datasheet
1.ATMEGA32C1.pdf
(366 pages)
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16.5.2
16.5.2.1
16.5.2.2
16.5.2.3
7647A–AVR–02/08
Operating Modes
Disabled
Tx Data & Remote Frame
Rx Data & Remote Frame
There is no default mode after RESET.
Every MOb has its own fields to control the operating mode. Before enabling the CAN periph-
eral, each MOb must be configured (ex: disabled mode - CONMOB=00).
Table 16-1.
In this mode, the MOb is “free”.
1. Several fields must be initialized before sending:
2. The MOb is ready to send a data or a remote frame when the MOb configuration is set
3. Then, the CAN channel scans all the MObs in Tx configuration, finds the MOb having
4. When the transmission is completed the TXOK flag is set (interrupt).
5. All the parameters and data are available in the MOb until a new initialization.
1. Several fields must be initialized before receiving:
MOb Configuration
0
0
1
1
– Identifier tag (IDT)
– Identifier extension (IDE)
– Remote transmission request (RTRTAG)
– Data length code (DLC)
– Reserved bit(s) tag (RBnTAG)
– Data bytes of message (MSG)
(CONMOB).
the highest priority and tries to send it.
– Identifier tag (IDT)
– Identifier mask (IDMSK)
– Identifier extension (IDE)
– Identifier extension mask (IDEMSK)
– Remote transmission request (RTRTAG)
– Remote transmission request mask (RTRMSK)
– Data length code (DLC)
– Reserved bit(s) tag (RBnTAG)
MOb Configuration
0
1
0
1
Reply Valid
0
1
x
x
x
x
x
RTR Tag
x
0
1
0
1
x
Operating Mode
Disabled
Tx Data Frame
Tx Remote Frame
Rx Data Frame
Rx Remote Frame
Rx Remote Frame then, Tx Data Frame (reply)
Frame Buffer Receive Mode
ATmega32/64/M1/C1
177
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