TMS28F200AST datasheet(12/79 Pages) TI

12 / 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

byte-wide or word-wide mode selection (continued)

Table 6. Operation Modes for Word-Wide Mode (BYTE = VIH) (see Note 1)

MODE

VPP

DQ0 – DQ15

Read

VIL

VIH

Data out

VIL

VIH

VID

VIL

Manufacturer-equivalent code

0089h

Algorithm-selection mode

VIL

VIH

VID

VIH

Device-equivalent code

2274h

(top boot block)

VIL

VIH

VID

VIH

Device-equivalent code

2275h

(bottom boot block)

Output disable

VIL

VIH

Hi-Z

Standby

VIH

Hi-Z

Reset / deep power-down

VIL

Hi-Z

Write (see Note 2)

VIL or

VIH

VIL

VIH

VIH or

VHH

VIL

VPPL or

VPPH

Data in

NOTES:

1. X = don’t care

2. When writing commands to the ’28F200Axy, VPP must be in the appropriate VPP voltage range (as shown in the recommended

operating conditions table for the product) for block-erase or program commands to be executed. Also, depending on the

combination of RP and WP, the boot block can be secured and, therefore, is not programmable (see Table 2 for the combinations).

Table 7. Operation Modes for Byte-Wide Mode (BYTE = VIL) (see Note 1)

MODE

VPP

DQ15 / A –1

DQ8 – DQ14

DQ0 – DQ7

Read lower byte

VIL

VIH

VIL

Hi-Z

Data out

Read upper byte

VIL

VIH

Hi-Z

Data out

VIL

VIH

VID

VIL

Hi-Z

Manufacturer-equivalent

code 89h

Algorithm-selection

Device-equivalent code

mode

VIL

VIH

VID

VIH

Hi Z

74h (top boot block)

VIL

VIH

VID

VIH

Hi-Z

Device-equivalent code

75h (bottom boot block)

Output disable

VIL

VIH

Hi-Z

Standby

VIH

Hi-Z

Reset / deep

power-down

VIL

Hi-Z

Write (see Note 2)

VIL

VIH

VIL

VIH

VHH

VIL

VPPL

VPPH

Hi-Z

Data in

NOTES:

1. X = don’t care

2. When writing commands to the ’28F200Axy, VPP must be in the appropriate VPP voltage range (as shown in the recommended

operating conditions table for the product) for block-erase or program commands to be executed. Also, depending on the

combination of RP and WP, the boot block can be secured and, therefore, is not programmable (see Table 2 for the combinations).

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