S71GL032A datasheet(21/102 Pages) SPANSION

21 / 102 page

March 31, 2005 S71GL032A_00_A0

S71GL032A Based MCPs

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Informatio n

Device Bus Operations

This section describes the requirements and use of the device bus operations,

which are initiated through the internal command register. The command register

itself does not occupy any addressable memory location. The register is a latch

used to store the commands, along with the address and data information

needed to execute the command. The contents of the register serve as inputs to

the internal state machine. The state machine outputs dictate the function of the

device. Table 1 lists the device bus operations, the inputs and control levels they

require, and the resulting output. The following subsections describe each of

these operations in further detail.

Table 1. Device Bus Operations

Legend: L = Logic Low = VIL, H = Logic High = VIH, VID = 11.5–12.5 V, VHH = 11.5–12.5 V, X = Don’t Care, SA = Sector

Address, AIN = Address In, DIN = Data In, DOUT = Data Out

Notes:

1. Addresses are Amax:A0 in word mode; Amax:A-1 in byte mode. Sector addresses are Amax:A15 in both modes.

2. The sector protect and sector unprotect functions may also be implemented via programming equipment. See the

“Sector Group Protection and Unprotection” section.

3. If WP# = VIL, the first or last sector remains protected (for uniform sector devices), and the two outer boot sectors

are protected (for boot sector devices). If WP# = VIH, the first or last sector, or the two outer boot sectors will be

protected or unprotected as determined by the method described in “Sector Group Protection and Unprotection”.

All sectors are unprotected when shipped from the factory (The Secured Silicon Sector may be factory protected

depending on version ordered.)

4. DIN or DOUT as required by command sequence, data polling, or sector protect algorithm (see Figure 7).

Operation

CE# OE# WE# RESET#

WP#

ACC

Addresses

(Note 1)

DQ0–

DQ7

DQ8–DQ15

BYTE#

= VIH

BYTE#

= VIL

Read

AIN

DOUT

DQ8–DQ14

= High-Z,

DQ15 = A-1

Write (Program/Erase)

(Note 3)

AIN

(Note 4)

(Note

Accelerated Program

(Note 3) VHH

AIN

(Note 4)

(Note

Standby

VCC ±

0.3 V

VCC ±

0.3 V

High-Z

Output Disable

High-Z

Reset

High-Z

Sector Group Protect

(Note 2)

VID

SA, A6 =L,

A3=L, A2=L,

A1=H, A0=L

(Note 4)

Sector Group

Unprotect

(Note 2)

VID

SA, A6=H,

A3=L, A2=L,

A1=H, A0=L

(Note 4)

Temporary Sector

Group Unprotect

VID

AIN

(Note 4)

(Note

High-Z

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