AT32UC3C1512C Automotive Atmel Corporation, AT32UC3C1512C Automotive Datasheet - Page 761

• Manufacturer Part Number: AT32UC3C1512C Automotive
• Manufacturer: Atmel Corporation

29.3
29.4
29.5
29.5.1
29.5.2
29.5.3
29.5.4
9166C–AVR-08/11
Block Diagram
I/O Lines Description
Product Dependencies
I/O Lines
Power Management
Clocks
Memory
Figure 29-1. CANIF Block Diagram
Table 29-1.
In order to use this module, other parts of the system must be configured correctly, as described
below.
CANIF pins are multiplexed with other peripherals. User must first program the I/O Controller to
give control of the pins to the CANIF.
If the CPU enters a sleep mode that disables clocks used by CANIF, it will stop functioning and
resume operation after the system wakes up from sleep mode.
CANIF is connected to both the HSB and the PB, and therefore uses a HSB clock
(CLK_CANIF_HSB) and a PB clock (CLK_CANIF_PB). These clocks are generated by the
Power Manager. These clocks are enabled at reset, and can be disabled in the Power Manager.
CANIF uses a GCLK as clock source (CAN clock) for the CAN bus communication
(GCLK_CANIF). User must make sure this clock is running and frequency is correct before any
operation.
Messages can be stored in CPU or HSB RAM, so user must allocate RAM space for CAN
messages.
TXLINE(n)
RXLINE(n)
Pin Name
RAM
I/O Lines Description
Transmission line of channel n
Reception line of channel n
HSB
Pin Description
PB
Msg Handling
& Filtering
Output
Type
Input
CANIF
Protocol
Engine
clock
CAN
AT32UC3C
TXLINE(0)
RXLINE(0)
RXLINE(n)
TXLINE(n)
.
.
.
761