AMD29F010B Datasheet, PDF (10/34 Pages) Advanced Micro Devices – 1 Megabit (128 K x 8-bit) CMOS 5.0 Volt-only, Uniform Sector Flash Memory

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 DQ7–DQ0. Standard read cycle timings and I_CC
read specifications apply. Refer to “Write Operation
Status” for more information, and to each AC Charac-
teristics 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, inde-
pendent of the OE# input.
The device enters the CMOS standby mode when the
CE# 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 CE# is held at V_IH. The
device requires the standard access time (t_CE) before it
is ready to read data.
If the device is deselected during erasure or program-
ming, 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 imped-
ance state.
Table 2. Am29F010B Sector Addresses Table
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
Note: All sectors are 16 Kbytes in size.
Autoselect Mode
The autoselect mode provides manufacturer and de-
vice identification, and sector protection verification,
through identifier codes output on DQ7–DQ0. 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 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 DQ7–DQ0.
To access the autoselect codes in-system, the host
system can issue the autoselect command via the
command register, as shown in the Command Defini-
tions table. This method does not require V_ID. See
“Command Definitions” for details on using the autose-
lect mode.
10
Am29F010B