SMJ28F010B

131072 BY 8-BIT

FLASH MEMORY

SGMS738 – APRIL 1998

5

POST OFFICE BOX 1443

operation

Table 1 lists the modes of operation for the device.

Table 1. Operation Modes

FUNCTION†

MODE

VPP‡

(1)

E

(22)

G

(24)

A0

(12)

A9

(26)

W

(31)

DQ0 – DQ7

(13 – 15, 17 – 21)

Read

VPPL

VIL

VIL

X

X

VIH

Data Out

Output Disable

VPPL

VIL

VIH

X

X

VIH

Hi-Z

Read

Standby and Write Inhibit

VPPL

VIH

X

X

X

X

Hi-Z

Read

Algorithm-Selection Mode

VPPL

VIL

VIL

VIL

VID

VIH

Manufacturer-Equivalent

Code 89h

g

PPL

IL

IL

VIH

ID

IH

Device-Equivalent Code B4h

Read

VPPH

VIL

VIL

X

X

VIH

Data Out

Read /

Output Disable

VPPH

VIL

VIH

X

X

VIH

Hi-Z

Write

Standby and Write Inhibit

VPPH

VIH

X

X

X

X

Hi-Z

Write

VPPH

VIL

VIH

X

X

VIL

Data In

† X can be VIL or VIH.

‡ VPPL ≤ VCC + 2 V; VPPH is the programming voltage specified for the device. For more details, see the recommended operating conditions.

read / output disable

When the outputs of two or more SMJ28F010B devices are connected in parallel on the same bus, the output

of any particular device in the circuit can be read with no interference from the competing outputs of other

devices. Reading the output of the SMJ28F010B is enabled when a low-level signal is applied to the E and G

pins. All other devices in the circuit must have their outputs disabled by applying a high-level signal to one of

these pins.

standby and write inhibit

high CMOS level on E. In this mode, all outputs are in the high-impedance state. The SMJ28F010B draws active

current when it is deselected during programming, erasure, or program / erase verification. It continues to draw

active current until the operation is terminated.

algorithm-selection mode

The algorithm-selection mode provides access to a binary code identifying the correct programming and erase

toggling A0. All other addresses must be held low. A0 low selects the manufacturer-equivalent code 89h, and

A0 high selects the device-equivalent code B4h, as shown in Table 2.

Table 2. Algorithm-Selection Modes

IDENTIFIER§

PINS

IDENTIFIER§

A0

DQ7

DQ6

DQ5

DQ4

DQ3

DQ2

DQ1

DQ0

HEX

Manufacturer-Equivalent Code

VIL

1

0

0

0

1

0

0

1

89

Device-Equivalent Code

VIH

1

0

1

1

0

1

0

0

B4

§ E =VIL, G = VIL, A1–A8 = VIL, A9 = VID, A10–A16 = VIL, VPP = VPPL.