S29CD032G datasheet(16/93 Pages) SPANSION

16 / 93 page

S29CD032G

30606B0 March 22, 2004

Ad va n c e

In f o rm a t i o n

it is not tested by executing an embedded operation in the big (busy) bank while

performing other operations in the small (non-busy) bank. Table 2.

Table 2. Bank Assignment for Boot Bank

Sector Devices

Also Table 18. ”Allowed Operations During Erase/Program Suspend. Also

Table 12. ”Sector Addresses for Ordering Option 00 and Table 13. ”Sector Ad-

dresses for Ordering Option 01.

Simultaneous Read/Write Operations With Zero Latency

The device is capable of reading data from one bank of memory while program-

ming or erasing in the other bank of memory. An erase operation may also be

suspended to read from or program to another location within the same bank (ex-

cept the sector being erased). Refer to the DC Characteristics table for read-

while-program and read-while-erase current specifications.

Simultaneous read/write operations are valid for both the main Flash memory

array and the SecSi OTP sector. Simultaneous Read/Write is disabled during the

CFI and Password Program/Verify operations. PPB Program/Erase operations and

the Password Unlock operation permit reading data from the large (75%) bank

while reading the operation status of these commands from the small (25%)

bank.

Table 3. Ordering Option 00

Table 4. Ordering Option 01

Writing Commands/Command Sequences

To write a command or command sequence (which includes programming data

to the device and erasing sectors of memory), the system must drive WE# and

CE# to VIL, and OE# to VIH.

The device features an Unlock Bypass mode to facilitate faster programming.

Once the device enters the Unlock Bypass mode, only two write cycles are re-

quired to program a word or byte, instead of four. The Sector Erase and Program

Suspend Command section has details on programming data to the device using

both standard and Unlock Bypass command sequences.

An erase operation can erase one sector, multiple sectors, or the entire device.

Tables 12 and 13 indicate the address space that each sector occupies. A “sector

address” consists of the address bits required to uniquely select a sector. The

Bank

Ordering Option 00

Ordering Option 01

Bank 0

Small Bank

Big Bank

Bank 1

Big Bank

Small Bank

Bank

A19:A18

Bank 0

Bank 1

01, 1X

Bank

A19

Bank 0

0X, 10

Bank 1

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