AT32UC3C2512C Automotive Atmel Corporation, AT32UC3C2512C Automotive Datasheet - Page 487

• Manufacturer Part Number: AT32UC3C2512C Automotive
• Manufacturer: Atmel Corporation

24.3
24.4
24.4.1
24.4.2
24.4.3
9166C–AVR-08/11
Block Diagram
Product Dependencies
I/O Lines
Power Management
Clocks
Figure 24-1. MACB Block Diagram
In order to use this module, other parts of the system must be configured correctly, as described
below.
The pins used for interfacing the MACB may be multiplexed with the I/O Controller lines. The
programmer must first program the I/O Controller to assign the desired MACB pins to their
peripheral function. If I/O lines of the MACB are not used by the application, they can be used for
other purposes by the I/O Controller.
If the CPU enters a sleep mode that disables clocks used by the MACB, the MACB will stop
functioning and resume operation after the system wakes up from sleep mode.
To prevent bus errors the MACB operation must be terminated before entering sleep mode.
The clocks for the MACB bus interface (CLK_MACB_PB/CLK_MACB_HSB) are generated by
the Power Manager. These clocks are enabled at reset, and can be disabled in the Power Man-
High Speed Bus
Peripheral Bus
Master
Slave
RX FIFO
Register Interface
DMA Interface
TX FIFO
Statistics Registers
Ethernet Transmit
Address Checker
Control Registers
Ethernet Receive
AT32UC3C
MII/RMII
MDIO
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