ID242 查看數據表（PDF） - Sharp Electronics

零件编号

产品描述 (功能)

生产厂家

ID242

Flash Memory Card

Sharp Electronics 

SHARP

ID242 SERIES PRODUCT OVERVIEW

7

-

6. Functions

6.1 Common Memory

6. 1. 1 Common Memory Architecture

Figure 2 shows common memory architecture of ID242 series flash memory card. Device pair is consisted of two

pieces of flash memory devices. Each device has individually erasable and lockable blocks. All

blocks are divided into odd bytes and even bytes.

Each device pair and block is selected by address bits. Table 3 shows definitions of address bits.

(a) For 2, 4, 8, 1OMB

F100'2.0:

F10580'

(b) For 16MB, 20MB

Figure 2. Common Memory Architecture

Table 3. Address Difinitions

Address Pifinitions

2MB - IOMB 16MB ,20MB

Select Even / Odd byte in the byte access

mode.

A0

1Select address in the block.

Select a block.

I

A16-Al

I

1 A20-A17 1 A21-A17 1

1Select a device pair.

1 A25-A21 1 A25-A22 1

T1051-01

CPS0002-002OMay.1991 3

Share Link: