SST85LD0128 datasheet(44/73 Pages) SST

44 / 73 page

Advance Information

NANDrive

SST85LD0128 / SST85LD0256 / SST85LD0512

S71319-03-000

2/07

Features 01H and 81H are used to enable and clear 8-bit data transfer mode. If the 01H feature

command is issued all data transfers will occur on the low order D7-D0 data bus and the IOCS16#

signal will not be asserted for data register accesses.

Features 02H and 82H allow the host to enable or disable write cache in the NANDrives that implement

write cache. When the subcommand Disable-Write-Cache is issued, the NANDrive should initiate the

sequence to flush cache to non-volatile memory before command completion.

Feature 03H allows the host to select the transfer mode by specifying a value in the Sector Count

One PIO mode is selected at all times. The host may change the selected modes by the Set-Features

command.

Feature 05H allows the host to enable advanced power management. To enable advanced power

management, the host writes the Sector Count register with the desired advanced power management

level and then executes a Set-Features command with subcommand code 05H. The power

management level is a scale from the lowest power consumption setting of 01H to the maximum

performance level of FEH. Table 12-10 shows these values.

TABLE 12-10: Advanced Power Management Levels

Level

Sector Count Value

Maximum performance

FEH

Intermediate power management levels without standby

81H-FDH

Minimum power consumption without standby

80H

Intermediate power management levels with standby

02H-7FH

Minimum power consumption with standby

01H

Reserved

FFH

Reserved

00H

T12-10.0 1319

SST85LD0128 Datasheet(PDF) 44 Page - Silicon Storage Technology, Inc