ISD-200 ETC2 [List of Unclassifed Manufacturers], ISD-200 Datasheet - Page 46

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

ISD-200 ASIC Datasheet
External Circuitry
External Components Connection
Figure 6 – External Components Connection
IORDY Hookup
The IORDY pin must be pulled up using a 1 K ohm resistor. The figure on the left is used when the ISD-
200 and another device (or devices) is connected to the ATA bus of the drive. The figure on the right is
used when the ISD-200 is the only device connected.
Figure 7 – IORDY Hookup
44
5.0V
5.0V
SDA
SCL
Crystal Specifications:
32 pf series capacitance
7 pf load capacitance
Crystals with different specifications
than above will require modified
circuit values for correct operation.
ISD-200
In-System Design Confidential
Note for brick powered systems:
System design must insure the 1.5K ohm pull-up
resistor on DPLS does not source power if VBUS
power is not present.
15pF
12MHz
USB_ENUM
DPLS
DMNS
15pF
1.5K
24
24
D +
D -