ISD-300A1 Cypress Semiconductor Corp, ISD-300A1 Datasheet - Page 50

• Manufacturer Part Number: ISD-300A1
• Description: IC USB 2.0 BRIDGE BULK 100LQFP
• Manufacturer: Cypress Semiconductor Corp

Specifications of ISD-300A1

• Applications: USB 2.0 to ATA/ATAPI Bridge
• Interface: ATA, ATAPI
• Voltage - Supply: 3 V ~ 3.6 V
• Package / Case: 100-LQFP
• Mounting Type: Surface Mount
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: 428-1459

October 19, 2001
Manufacturing Test Mode
This mode of operation is provided for interconnect test in a manufacturing environment. During
Manufacturing Test Mode operation, all outputs not associated directly with USB operation are
controllable. Normal state machine and register control of output pins is disabled. ISD-300A1 input pins
not associated directly with USB operation can be sampled at any time during normal or Manufacturing
Test Mode operation.
Vendor specific USB commands are used to enable and control Manufacturing Test Mode operation and to
sample input pin states. See Vendor-Specific Requests for more details on the LOAD_MFG_DATA and
READ_MFG_DATA USB commands.
External Circuitry
USB, Crystal, and I
Figure 5 – External Components connection
ATA Interface Considerations
1K Ohm Pull-down Resistor On DD<7>
For “slave” devices, a 1K ohm pull-down resistor must be utilized on DD7 for ISD-300A1 based designs.
This is required for proper operation of the ISD-300A1 master/slave device auto detection algorithm. If
this modification is omitted, slave devices will take an excessive amount of time to initialize (around 30
seconds). In systems with only master devices this modification may be omitted.
ATA_PD_EN and ATA_PU_EN Usage In Self Powered Systems
These signals are controlled by ATA_EN, DRV_PWR_VALID, and DISK_READY. If these inputs are
static, the ATA_Px_EN outputs can be left unconnected and the pull-up and pull-down resistors that
normally connect to these outputs can be directly tied to the appropriate power rails.
Analog
VCC
3.3V
9.1ΚΩ
(1%)
1.5ΚΩ
Analog
GND
3.3V
Digital
2
VCC
C Interface Connections
SDA
SCL
RREF
AVSS
Crystal Specifications:
KDS AT-49, 10 pf load cap., 50 ppm.
Crystals with different specifications
than above will require modified
circuit values for correct operation.
ISD-300A
ATA Interface
45
1
9pF
30MHz
DP
RSDP
RPU
DM
RSDM
9pF
100Ω
Note: For High-speed
operation, the 36Ω
resistors on RSDM and
RSDP combine with 9Ω
internal impedance to
provide 45Ω on D+ and
D-, or 90Ω differential
impedance.
1.5KΩ
36Ω
36Ω
D -
D +
ISD-300A1