phyCORE-LPC2292/94
26
©
PHYTEC Messtechnik GmbH 2006 L-658e_5
3.3
J204 A/D Converter
The integrated analog/digital converter on the phyCORE-LPC2292/94
requires an upper and lower reference voltage (V
ADREF
) connected at
pin 14 of the microcontroller. The reference voltage source can be
selected using Jumper J204.
The following configurations are possible:
Reference Voltage Configuration
J204
V
ADVREF
derived from main supply voltage VDD_V3V3
1 + 2*
external A/D reference voltage source
(V
ADVREF
at X700D50)
2 + 3
* = Default setting
Table 5:
J204 A/D Converter Reference Voltage
3.4
J205, J206 Chip Select Configuration
If the phyCORE-LPC2292/94 is delivered with the minimum memory
configuration, then the CPLD device is not required. In this case
Jumper J205 and J206 must be closed in order to connect the Chip
Select signals for Flash and SRAM with the corresponding controller
signals. These jumpers remain open on all other memory configuration
varaints of the phyCORE-LPC2292/94 since the required Chip Select
signals for Flash and SRAM must be decodede by the CPLD at U202
in order to ensure correct memory addressing.
Содержание phyCORE-LPC2292/94
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