S29PL-J55BAI011 datasheet(67/96 Pages) SPANSION

67 / 96 page

September 22, 2006 S29PL-J_00_A9

S29PL-J

Da ta

Sh e e t

(Adv a n ce

In f o r m ation)

Figure 16.1 Data# Polling Algorithm

Notes

1. VA = Valid address for programming. During a sector erase operation, a valid address is any sector address within the sector being

erased. During chip erase, a valid address is any non-protected sector address.

2. DQ7 should be rechecked even if DQ5 = “1” because DQ7 may change simultaneously with DQ5.

16.2

RY/BY#: Ready/Busy#

The RY/BY# is a dedicated, open-drain output pin which indicates whether an Embedded Algorithm is in

progress or complete. The RY/BY# status is valid after the rising edge of the final WE# pulse in the command

sequence. Since RY/BY# is an open-drain output, several RY/BY# pins can be tied together in parallel with a

pull-up resistor to VCC.

If the output is low (Busy), the device is actively erasing or programming. (This includes programming in the

Erase Suspend mode.) If the output is high (Ready), the device is in the read mode, the standby mode, or one

of the banks is in the erase-suspend-read mode.

Table 16.1 on page 68 shows the outputs for RY/BY#.

16.3

DQ6: Toggle Bit I

Toggle Bit I on DQ6 indicates whether an Embedded Program or Erase algorithm is in progress or complete,

or whether the device has entered the Erase Suspend mode. Toggle Bit I may be read at any address, and is

valid after the rising edge of the final WE# pulse in the command sequence (prior to the program or erase

operation), and during the sector erase time-out.

During an Embedded Program or Erase algorithm operation, successive read cycles to any address cause

DQ6 to toggle. The system may use either OE# or CE# to control the read cycles. When the operation is

complete, DQ6 stops toggling.

After an erase command sequence is written, if all sectors selected for erasing are protected, DQ6 toggles for

approximately 400 µs, then returns to reading array data. If not all selected sectors are protected, the

Embedded Erase algorithm erases the unprotected sectors, and ignores the selected sectors that are

protected.

DQ7 = Data?

Yes

DQ5 = 1?

Yes

FAIL

PASS

Read DQ7–DQ0

Addr = VA

Read DQ7–DQ0

Addr = VA

DQ7 = Data?

START

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