TMS28F200AST datasheet(6/79 Pages) TI

6 / 79 page

TMS28F002Axy, TMS28F200Axy

262144 BY 8-BIT/131072 BY 16-BIT

AUTO-SELECT BOOT-BLOCK FLASH MEMORIES

SMJS826D – JANUARY 1996 – REVISED SEPTEMBER 1997

POST OFFICE BOX 1443

• HOUSTON, TEXAS 77251–1443

functional block diagram

Counter

Address

Latch

Control

Reduction

Power-

X Decoder

Y Decoder

Y Gating / Sensing

Block

Main

128K-Byte

Block

Main

96K-Byte

Block

Parameter

8K-Byte

Block

Parameter

8K-Byte

Block

Boot

16K-Byte

I/O Logic

Program/

Voltage

Switch

Erase

Machine

State

Write -

Data

Comparator

Data

Input

Buffer

Input

Buffer

Status

Identification

Multiplexer

Output

Input Buffer

DQ15/A –1

Output

Buffer

Output

DQ8 – DQ15/A –1†

DQ0 – DQ7

A0 –

A16

BYTE†

VPP

Input

Buffer

Machine

State

Command -

† Not used on ’F002 model

architecture

The TMS28F200Axy uses a blocked architecture to allow independent erasure of selected memory blocks. The

block to be erased is selected by using any valid address within that block.

block-memory maps

The TMS28F200Axy is available with the block architecture mapped in either of two configurations: the boot

block located at the top or at the bottom of the memory array, as required by different microprocessors. The

TMS28F200AxB (bottom boot block ) is mapped with the 16K-byte boot block located at the low-order address

range (00000h to 01FFFh). The TMS28F200AxT (top boot block ) is inverted with respect to the

TMS28F200AxB with the boot block located at the high-order address range (1E000h to 1FFFFh). Both of these

address ranges are for word-wide mode. The TMS28F002Axy is mapped as the 8-bit configuration of the

TMS28F200Axy, except that the least signficant bit (LSB) is A0 instead of A–1. Figure 1 and Figure 2 show the

memory maps for these configurations.

TMS28F200AST Datasheet(PDF) 6 Page - Texas Instruments

TMS28F200AST Datasheet(HTML) 6 Page - Texas Instruments

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79

Datasheet Download

Link URL