Atmel AT91CAP9, User Manual

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3-4 AT91CAP9A-DK Development Kit User Guide
6321B–CAP–02-Jul-07
These two ports are routed directly from/to the AT91CAP9 chip installed on the mezzanine. In function of
the AT91CAP9 chip connected in the system, these two ports can be non operating. For further informa-
tion, please refer to the documentation specific to the mezzanine you intend to use.
3.7.3 Device USB Interface
Please refer to Section 3.14 “FPGA Extension” on page 3-5.
3.7.4 Ethernet Interface
On-board RMII 100-base TX PHY: DM9161 MN7 connected to a standard RJ45 socket J21. Three sta-
tus LEDs (DS4, 5, 6) provide network activity feedback.
3.8 Audio Stereo Interface
3.8.1 AC97
One AC97 2.3 compliant Codec (MN11 = AD1981B, 20-bit PCM DAC) with the following connectors:
„ 32-ohm stereo headset line-out
„ stereo line input
„ stereo electret microphone input
This interface has some configuration elements. Please refer to Section 4 “AT91CAP-DKM Configura-
tion” and/or “AT91CAP-DKM Schematics” for in-depth details.
3.8.2 I2S
One I2S audio codec MN14 = UDA1342TS with the following connectors:
„ line-out
„ line-in
3.9 Analog Interface
Four analog inputs (range up to 3.3V). These are available through the J33 connector and are buffered
by a quadruple gain-1 amplifier, MN12 = AD8040ARZ.
These four buffered signals can be connected to the eight AT91CAP9 analog input channels via the four
configuration jumpers J3-1 to J3-4. Refer to
Table 4-1 for more details.
3.10 User Interface
The various items interfaced with the AT91CAP-DKM motherboard are all driven by the PIO busses of
the AT91CAP9 chip. (Refer to
“AT91CAP-DKM Schematics” for detailed assignation)
„ 4x4 keypad: uses 8 PIO lines in a matrix scheme, each button shunts two of them
„ Two green LEDs
„ One yellow power LED (note that it is software controlled)
„ One 3.5 inch VGA display LCD with Touch Panel and white LED backlight