VEX-6254
Vortex
86EX
CPU Module
19
2.8 SPI flash (Serial Peripheral Interface)
SPI Flash
(
Serial Peripheral Interface) offers many benefits including: reduced controller pin
count, smaller and simpler PCBs, reduced switching noise, less power consumption, and lower
system cost.
If users are considering using a formatted SPI flash to boot the system or emulate SPI flash as
Floppy (A: Driver or B: Driver), changing CMOS Setup will be required. Boot up under DOS 6.22,
X-DOS, DR-DOS or Free DOS is recommended.
For more technical support, please visit:
http://dmp.com.tw/tech
.
2.9 A/D (Analog-to-Digital) Converter
Onboard ADC is an 11-bit, 100kS/s analog-to-digital converter. This ADC adopts successive
approximation register (SAR) architecture which using a 9-bit charge scaling sub-DAC for MSB
and a 2-bit voltage scaling sub-DAC for LSB. The input range is between 0 and VCCA (3.3V).
Features
11-bit, 100kS/s SAR A/D Converter
8-channel input
Input signal range: 0V~VCC33A(3.3V)
Operating voltage range: 2.93V~3.63V
Operating junction temperature range: -40°C~125°C
