SL11RIDE 데이터 시트보기 (PDF) - Cypress Semiconductor

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SL11RIDE

USB to IDE/ATAPI Solution

Cypress Semiconductor 

SL11RIDE

Max at 4 MHz CPU speed: 4.0 mA (USB is on)

Max at 32 MHz CPU speed: 25.0 mA (USB is on)

Max at 48 MHz CPU speed: 30.0 mA (USB is on)

4.5 Functions for Suspend, Resume, and Low-Power modes

The SL11RIDE’s CPU supports suspend, resume, and CPU low power mode. The SL11RIDE BIOS assigns USBPU for the USB

DATA+ line pull-up, which simulates USB cable removal or insertion while USB power is still applied to the board.

USBPU

1.5 kΩ

USB type B Connector

36Ω

36Ω

1

2

3

4

VCC

D-

D+

GND

Figure 4-1. USBPU Pull-up Connection Example

4.6 PLL Clock Generator

A 48-MHz external crystal can be used with the SL11RIDE. Two pins, X1 and X2, are provided to connect a low-cost crystal circuit

to the device. Circuitry is provided to generate the internal clock requirements of the device. If an external 48-MHz clock is available

in the application, it may be used instead of the crystal circuit by connecting directly to the X1 input pin.

X1

X2

Rf

1M

X1

Cbk

0.01 µuF

48 MHz, series, 20-pF load

Lin

3.3 µH

Rs

100

Cout

22 pF

Figure 4-2. Full-Speed 48-MHz Crystal Circuit

Document #: 38-08007 Rev. **

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