A49LF004 데이터 시트보기 (PDF) - AMIC Technology

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A49LF004

4 Mbit CMOS 3.3Volt-only Firmware Hub Flash Memory

AMIC Technology 

A49LF004

Software Data Protection (SDP)

The A49LF004 provides the JEDEC approved Software

Data Protection scheme for all data alteration operation, i.e.,

Program and Erase. Any Program operation requires the

inclusion of a series of three-byte sequences. The three-byte

load sequence is used to initiate the Program operation,

providing optimal protection from inadvertent Write

operations, e.g., during the system power-up or power-down.

Any Erase operation requires the inclusion of a six-byte load

sequence. The A49LF004 device is shipped with the

Software Data Protection permanently enabled. See Table 8

for the specific software command codes. During SDP

command sequence, invalid commands will abort the device

to Read mode, within TRC.

Electrical Specifications

The AC and DC specifications for the FWH Interface signals

(FWH[3:0], CLK, FWH4, and RST#) as defined in Section

4.2.2 of the PCI Local Bus Specification, Rev. 2.1. Refer to

Table 9 for the DC voltage and current specifications. Refer

to the specifications on Table 10 to Table 19 for Clock,

Read/Write, and Reset operations.

Product Identification

The product identification mode identifies the Manufacturer

ID, Continuation ID, and Device ID of the A49LF004. See

Table 7 for detail information.

PRELIMINARY (November, 2003, Version 0.0)

12

AMIC Technology, Corp.

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