S29GL032A datasheet(22/95 Pages) SPANSION

22 / 95 page

S29GL-A

S29GL-A_00_A11 September 10, 2007

Da ta

Sh e e t

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 7.1 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.

Legend

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

and Unprotection on page 41.

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 are protected or unprotected as determined by the

method described in Sector Group Protection and Unprotection on page 41. 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 10.3 on page 64).

Table 7.1 Device Bus Operations

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)

XAIN

(Note 4)

Accelerated Program

(Note 3)

VHH

AIN

(Note 4)

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)

High-Z

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