UPD720130GC-9EU-SIN 查看數據表（PDF） - NEC => Renesas Technology

零件编号

产品描述 (功能)

生产厂家

UPD720130GC-9EU-SIN

USB2.0 to IDE Bridge

NEC => Renesas Technology 

µPD720130

To realize bus-powered USB2.0 to IDE Bridge system, the power consumption for IDE device should be

controlled by the power state of the µPD720130. The µPD720130 has DPC pin to control IDE device’s power

circuit. DPC pin’s output level relates to USB device states. DPC should be pull up to 3.3 V because DPC

output becomes high impedance state until the µPD720130 is initialized.

Figure 2-4. DPC Pin to Control IDE Device’s Power Circuit

High impedance state

Default

Un-configured

Configured

Suspend

Configured

DPC

Normal

Operation

Normal

Operation

Power ON

Hardware Reset

Bus Reset

Set

Configuration

Suspend

Occured

Resume

Occured

Following reference circuit can cut off power supply to IDE device during the µPD720130 is under default

and un-configured state. Also, the power supply to IDE device is disabled during suspend state, too.

Power consumption of total system under default, un-configured, and suspend state can be reduced by

DPC pin.

Figure 2-5. Power Control Circuit Example

Power supply rail

µ PD720130

3.3 V

Pull

Up

IN

OUT

P-Channel Switch

Regulator

IDE Device

Power

DPC

ON

14

Data Sheet S16302EJ3V0DS

Share Link: