User's Manual

COMPANY CONFIDENTIAL
29
Notes:
1. Signal type codes:
I – 3.3V level Digital Logic Input into the DM870A
O – 3.3V level Digital Logic Output from the DM870A
IO – 3.3V level Digital Logic Input and Output (bi-directional) signal
M – Miscellaneous, see text for description
P – Power Supply
2. For SPI timing diagram for eDMP applications, please see:
BridgeCo_JB2x - DeviceControlProtocol_Registers_v_2_1.pdf, or later version.
For detailed setup and hold timing details, see DM870A IC data sheet:
DM870A DS rev. 1.3_12-15-11.pdf, or later version.
3. For audio port timing diagrams, and for detailed setup and hold timing, please see DM870A IC data sheet:
DM870A DS rev. 1.3_12-15-11.pdf, or later version.
4. For example ethernet external schematic, see:
CX Module Ethernet (RJ45 + Ext.Magnetics)_V1.2.pdf, or later version.
This schematic is typically compressed into a zip file, for example:
CX Module_Interface Schematics_one_page_V1.2_Jun_11.rar
5. For example USB schematics, see:
CX Module USB_V1.2.pdf, or later version.
This schematic is typically compressed into a zip file, for example:
CX Module_Interface Schematics_one_page_V1.2_Jun_11.rar
6. For example use of extended GPIO shift registers, see CE2 schematic:
A EVMCE2-4_schematic.pdf, or later version.
7. For example connection to a video D/A converter, see CE2 schematic:
A EVMCE2-4_schematic.pdf, or later version.
8. iPod dock connector pin and GPIO assignments are under discussion. Please contact SMSC for
recommendations for iPod dock connections to CX870 module.
9. For example connection to an LCD display, see CE2 schematic:
A EVMCE2-4_schematic.pdf, or later version.
10. All the above signals are brought out to J2 pins. Not all the above signals are brought out to J3, the 64-pin
low density connector. The J3 pin assignments table shows which signals are brought out to the J3 pins.
11. SMSC has a set of example motherboard schematics that shows example external circuitry that is typically
connected to the module. Please check the SMSC/BridgeCo customer portal at
https://portal.bridgeco.net/
for a copy of these example schematics. These schematics are typically compressed into a zip file, for
example:
CX Module_Interface Schematics_one_page_V1.2_Jun_11.rar
12. Please check the SMSC/BridgeCo Customer Portal Download area for the latest version of the SMSC
documents. Go to
https://portal.bridgeco.net/. If you do not have an account, please contact SMSC.