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

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UPD720130GC-9EU-SIN

USB2.0 to IDE Bridge

NEC => Renesas Technology 

µPD720130

2.2 External Pin Setting

Usually, serial ROM should be used to keep Vendor ID, Product ID and some additional USB related

information. And then, the external pin setting of the µPD720130 is not so important to realize USB to IDE bridge

system. The recommended external pin setting is as follows.

Table 2-2. Recommended External Pin Setting

Pin Name

Setting

MD1

1

MD0

SCL

0

Pull Up Note 1

SDA

Pull Up

DV1

“L” clamp

DV0

“L” clamp

CLC

“L” clamp

PWR

DCC

“L” clamp

Pull Down Note 2

GPIO(7:0)

“L” clamp

PIO(14:15)

“L” clamp

PIO5

“L” clamp

SPD

“H” clamp

TEST(3:0)

“L” clamp

SMC

“L” clamp

IRQ0

“L” clamp

Notes 1.

2.

If serial ROM size is more than 2 Kbytes, SCL should be pull down.

If target IDE device is not fixed, it is preferable that DCC pin can

switch pull-up or pull-down.

The setting for any other pins such as CMB_BSY, CMB_STATE depends on USB2.0 to IDE Bridge system.

For example, if two IDE controllers control one target IDE device and one of two IDE controllers is the µPD720130,

CMB_BSY and CMB_STATE are used to handshake between two IDE controller chips. On the other hand, when

the µPD720130 is only controller of target IDE device, CMB_BSY should be opened and CMB_STATE should be

clamped to “L”.

8

Data Sheet S16302EJ3V0DS

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