MX28F2000PPC-90C4 datasheet(7/33 Pages) MCNIX

7 / 33 page

P/N: PM0380

REV. 1.5, OCT 29, 1998

MX28F2000P

COMMAND DEFINITIONS

When low voltage is applied to the VPP pin, the con-

tents of the command register default to 00H, enabling

read-only operation.

Placing high voltage on the VPP pin enables read/write

operations. Device operations are selected by writing

specific data patterns into the command register. Ta-

ble 1 defines these MX28F2000P register commands.

Table 2 defines the bus operations of MX28F2000P.

TABLE 2. MX28F2000P BUS OPERATIONS

OPERATION

VPP(1)

DQ0-DQ7

READ-ONLY

Read

VPPL

VIL

VIH

Data Out

Output Disable

VPPL

VIL

VIH

Tri-State

Standby

VPPL

VIH

Tri-State

Read Silicon ID (Mfr)(2)

VPPL

VIL

VID(3)

VIL

VIH

Data = C2H

Read Silicon ID (Device)(2)

VPPL

VIH

VID(3)

VIL

VIH

Data = 2AH

READ/WRITE

Read

VPPH

VIL

VIH

Data Out(4)

Standby(5)

VPPH

VIH

Tri-State

Write

VPPH

VIL

VIH

VIL

Data In(6)

NOTES:

1. VPPL may be grounded, a no-connect with a resistor tied

to ground, or < VCC + 2.0V. VPPH is the programming

voltage specified for the device. When VPP = VPPL,

memory contents can be read but not written or erased.

2. Manufacturer and device codes may also be accessed

via a command register write sequence. Refer to Table

1. All other addresses don't care.

3. VID is the Silicon-ID-Read high voltage.(11.5V to 13v)

4. Read operations with VPP = VPPH may access array

data or Silicon ID codes.

5. With VPP at high voltage, the standby current equals ICC

+ IPP (standby).

6. Refer to Table 1 for valid Data-In during a write operation.

7. X can be VIL or VIH.

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