FLASH

AS8F128K32

AS8F128K32

Rev. 2.8 01/10

Micross Components reserves the right to change products or specifications without notice.

4

Program and Erase Operation Status

During an erase or program operation, the system may

check the status of the operation by reading the status bits on I/

O31–I/O0. Standard read cycle timings and I

CC

read specifica-

tions apply. Refer to “Write Operation Status” for more informa-

tion, and to each AC Characteristics section in the appropriate

data sheet for timing diagrams.

Standby Mode

When the system is not reading or writing to the device, it

can place the device in the standby mode. In this mode, current

consumption is greatly reduced, and the outputs are placed in

the high impedance state, independent of the OE\ input.

The device enters the CMOS standby mode when the CEx\

pin is held at V

CC

± 0.5 V. (Note that this is a more restricted

voltage range than V

IH

.) The device enters the TTL standby

mode when CEx\ is held at V

IH

. The device requires the stan-

dard access time (t

CE

) before it is ready to read data.

If the device is deselected during erasure or programming,

the device draws active current until the operation is completed.

I

CC3

in the DC Characteristics tables represents the standby

current specification.

Output Disable Mode

When the OE\ input is at V

IH

, output from the device is

disabled. The output pins are placed in the high impedance

state.

Autoselect Mode

The autoselect mode provides manufacturer and device

identification, and sector protection verification, through

identifier codes output on I/O31–I/O0. This mode is primarily

intended for programming equipment to automatically match a

device to be programmed with its corresponding programming

algorithm. However, the autoselect codes can also be accessed

in-system through the command register.

When using programming equipment, the autoselect mode

requires V

ID

(11.5 V to 12.5 V) on address pin A9. Address pins

A6, A1, and A0 must be as shown in Autoselect Codes (High

Voltage Method) table. In addition, when verifying sector

protection, the sector address must appear on the appropriate

highest order address bits. Refer to the corresponding Sector

Address Tables. The Command Definitions table shows the

remaining address bits that are don’t care. When all necessary

bits have been set as required, the programming equipment may

then read the corresponding identifier code on I/O31–

I/

O0.

To access the autoselect codes in-system, the host system

can issue the autoselect command via the command register,

as shown in the Command Definitions table. This method does

not require V

ID

. See “Command Definitions” for details on

using the autoselect mode.

TABLE 2: Sector Addresses Table (Each Byte)

SECTOR

A16

A15

A14

ADDRESS RANGE

SA0

0

0

0

00000h - 03FFFh

SA1

0

0

1

04000h - 07FFFh

SA2

0

1

0

08000h - 0BFFFh

SA3

0

1

1

0C000h - 0FFFFh

SA4

1

0

0

10000h - 13FFFh

SA5

1

0

1

14000h - 17FFFh

SA6

1

1

0

18000h - 1BFFFh

SA7

1

1

1

1C000h - 1FFFFh