UPD720133 View Datasheet(PDF) - NEC => Renesas Technology

Part Name

Description

Manufacturer

UPD720133

USB2.0 to IDE Bridge

NEC => Renesas Technology 

µPD720133

2.2 Pin Setting

Settings of the SCL, SDA and unused pins (TEST and SCAN) are recommended as follows. Please note that the

setting of the SCL depends on size of Serial ROM.

Table 2-2. Pin Settings

Pin Name

SCL

Pull Up Note

Setting

SDA

Pull Up

TEST

Low Clamp

SCAN

Low Clamp

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

The settings for any other pins such as the CMB_BSY and the CMB_STATE depend on USB2.0 to IDE Bridge

system. For example, if two IDE controllers are implemented in the system to control one target IDE device and one

of the two IDE controllers is the µPD720133, then both the CMB_BSY and the CMB_STATE are used to handshake

between the two IDE controller chips. On the other hand, when the system uses the µPD720133 as the only IDE

controller to control a target IDE device, then both the CMB_BSY and the CMB_STATE should be connected to

ground.

Preliminary Data Sheet S17100EJ2V0DS

7

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