Cypress Semiconductor CY7C68301C Manual do Utilizador descarregar pdf (Página 25)

CY7C68300C, CY7C68301C

CY7C68320C, CY7C68321C

Document Number: 001-05809 Rev. *K Page 25 of 44

0x08 BUTTON_MODE Bit 7

Button mode (100-pin package only). Sets ATAPUEN,

PWR500# and DRVPWRVLD to become button inputs

returned on bits 2, 1, and 0 of EP1IN. This bit must be set to

‘0’ if the 56-pin packages are used.

0 = Disable button mode.

1 = Enable button mode.

0x78

SEARCH_ATA_BUS Bit 6

Search ATA bus after RESET to detect non-removable ATA

and ATAPI devices. Systems with only a removable device

(such as CF readers) must set this bit to ‘0’. Systems with at

least one non-removable device must set this bit to ‘1’.

0 = Do not search for ATA devices.

1 = Search for ATA devices.

BIG_PACKAGE Bit 5

Selects the 100- or 56-pin package pinout configuration. Using

the wrong pinout may result in unpredictable behavior.

0 = Use 56-pin package pinout.

1 = Use 100-pin package pinout.

ATA_EN Bit 4

Drive ATA bus when AT2LP is in suspend. For designs in which

the ATA bus is shared between the AT2LP and another ATA

master (such as an MP3 player), the AT2LP can place the ATA

interface pins in a High Z state when it enters suspend. For

designs that do not share the ATA bus, the ATA signals must

be driven while the AT2LP is in suspend to avoid floating

signals.

0 = Drive ATA signals when AT2LP is in suspend.

1 = Set ATA signals to High Z when AT2LP is in suspend.

Reserved Bit 3

Reserved. This bit must be set to ‘0’.

Reserved Bit 2

Reserved. This bit must be set to ‘0’

Drive Power Valid Polarity Bit 1

Configure the logical polarity of the DRVPWRVLD input pin.

0 = Active LOW (‘connector ground’ indication)

1 = Active HIGH (power indication from device)

Drive Power Valid Enable Bit 0

Enable the DRVPWRVLD pin. When this pin is enabled, the

AT2LP enumerates a removable ATA device, such as

CompactFlash or MicroDrive, as the IDE master device.

Enabling this pin also affects other pins related to removable

device operation.

0 = Disable removable ATA device support.

1 = Enable removable ATA device support.

Table 11. Configuration Data Organization (continued)

Byte

Address

Configuration

Item Name

Configuration

Item Description

Required

Contents

Variable

Contents

1 2 ... 20 21 22 23 24 25 26 27 28 29 30 ... 43 44

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