AT91SAM9G20 datasheet(36/832 Pages) ATMEL

36 / 832 page

6384D–ATARM–04-May-09

AT91SAM9G20 Preliminary

– Three external clock inputs

– Five internal clock inputs

– Two multi-purpose input/output signals

• Each block contains two global registers that act on all three TC Channels

Note:

TC Block 0 (TC0, TC1, TC2) and TC Block 1 (TC3, TC4, TC5) have identical user interfaces. See

Figure 8-1, “AT91SAM9G20 Memory Mapping,” on page 19 for TC Block 0 and TC Block 1 base

addresses.

10.4.6

Multimedia Card Interface

• One double-channel MultiMedia Card Interface

• Compatibility with MultiMedia Card Specification Version 3.11

• Compatibility with SD Memory Card Specification Version 1.1

• Compatibility with SDIO Specification Version V1.0.

• Card clock rate up to Master Clock divided by 2

• Embedded power management to slow down clock rate when not used

• MCI has two slots, each supporting

– One slot for one MultiMediaCard bus (up to 30 cards) or

– One SD Memory Card

• Support for stream, block and multi-block data read and write

10.4.7

USB Host Port

• Compliance with Open HCI Rev 1.0 Specification

• Compliance with USB V2.0 Full-speed and Low-speed Specification

• Supports both Low-Speed 1.5 Mbps and Full-speed 12 Mbps devices

• Root hub integrated with two downstream USB ports in the 217-LFBGA package

• Two embedded USB transceivers

• Supports power management

• Operates as a master on the Matrix

10.4.8

USB Device Port

• USB V2.0 full-speed compliant, 12 MBits per second

• Embedded USB V2.0 full-speed transceiver

• Embedded 2,432-byte dual-port RAM for endpoints

• Suspend/Resume logic

• Ping-pong mode (two memory banks) for isochronous and bulk endpoints

• Six general-purpose endpoints

– Endpoint 0 and 3: 64 bytes, no ping-pong mode

– Endpoint 1 and 2: 64 bytes, ping-pong mode

– Endpoint 4 and 5: 512 bytes, ping-pong mode

• Embedded pad pull-up

10.4.9

Ethernet 10/100 MAC

• Compatibility with IEEE Standard 802.3

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