ISD-200 ETC2 [List of Unclassifed Manufacturers], ISD-200 Datasheet - Page 42

• Manufacturer Part Number: ISD-200
• Description: USB Mass Storage Class Bulk-Only Specification Compliant
• Manufacturer: ETC2 [List of Unclassifed Manufacturers]

ISD-200 ASIC Datasheet
40
Device Descriptor (See Table 7):
Configuration Descriptor (See Table 8):
Configuration 1 = Dynamic Configuration (NPWR500 asserted)
Configuration 2 = Self-Powered Configuration
If ‘Report One Configuration’ is set to 1:
If ‘Report One Configuration’ is set to 0:
o
o
o
o
bNumConfigurations = 1 if ‘Report One Configuration’ is set otherwise 2
bConfigurationValue1 = 1
iConfiguration1 = 3
bMaxPower1 = (USB Current required by the peripheral system limited to under 500mA)
iInterface1 = 4
bConfigurationValue2 = 2
iConfiguration2 = 7
bMaxPower2 = 0x31 (98 mA)
iInterface2 = 8
Configuration 2 consists of configuration 1 values except with the 4 bytes of override
values from bConfigurationValue2, iConfiguration2, bMaxPower2, and iInterface2 (See
Tables 3 and 7-8).
Configuration 1 will be returned when BUS_POWER is asserted.
Configuration 2 will be returned when BUS_POWER is de-asserted.
When BUS_POWER is asserted, bNumConfigurations in the device descriptor will be
overridden with 1 and Configuration 1 will be returned.
When BUS_POWER is not asserted Configuration 1 and Configuration 2 will be
returned.
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