AM29PDL640G Datasheet, PDF (14/61 Pages) SPANSION – 64 Megabit (4 M x 16-Bit) CMOS 3.0 Volt-only, Simultaneous Read/Write Flash Memory with Enhanced VersatileIO Control

PRELIMINARY
The device enters the CMOS standby mode when the
CE# and RESET# pins are both held at V_IO ± 0.3 V.
(Note that this is a more restricted voltage range than
V_IH.) If CE# and RESET# are held at V_IH, but not within
V_IO ± 0.3 V, the device will be in the standby mode, but
the standby current will be greater. The device re-
quires standard access time (t_CE) for read access
when the device is in either of these standby modes,
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 table represents the
CMOS standby current specification.
Automatic Sleep Mode
The automatic sleep mode minimizes Flash device en-
ergy consumption. The device automatically enables
this mode when addresses remain stable for t_ACC +
30 ns. The automatic sleep mode is independent of
the CE#, WE#, and OE# control signals. Standard ad-
dress access timings provide new data when ad-
dresses are changed. While in sleep mode, output
data is latched and always available to the system.
Note that during automatic sleep mode, OE# must be
at V_IH before the device reduces current to the stated
sleep mode specification. I_CC5 in the DC Characteris-
tics table represents the automatic sleep mode current
specification.
RESET#: Hardware Reset Pin
The RESET# pin provides a hardware method of re-
setting the device to reading array data. When the RE-
SET# pin is driven low for at least a period of t_RP, the
device immediately terminates any operation in
progress, tristates all output pins, and ignores all
read/write commands for the duration of the RESET#
pulse. The device also resets the internal state ma-
chine to reading array data. The operation that was in-
terrupted should be reinitiated once the device is
ready to accept another command sequence, to en-
sure data integrity.
Current is reduced for the duration of the RESET#
pulse. When RESET# is held at V_SS±0.3 V, the device
draws CMOS standby current (I_CC4). If RESET# is held
at V_IL but not within V_SS±0.3 V, the standby current will
be greater.
The RESET# pin may be tied to the system reset cir-
cuitry. A system reset would thus also reset the Flash
memory, enabling the system to read the boot-up firm-
ware from the Flash memory.
If RESET# is asserted during a program or erase op-
eration, the RY/BY# pin remains a “0” (busy) until the
internal reset operation is complete, which requires a
time of t_READY (during Embedded Algorithms). The
system can thus monitor RY/BY# to determine
whether the reset operation is complete. If RESET# is
asserted when a program or erase operation is not ex-
ecuting (RY/BY# pin is “1”), the reset operation is com-
pleted within a time of t_READY (not during Embedded
Algorithms). The system can read data t_RH after the
RESET# pin returns to V_IH.
Refer to the AC Characteristics tables for RESET# pa-
rameters and to Figure 14 for the timing diagram.
Output Disable Mode
When the OE# input is at V_IH, output from the device is
disabled. The output pins (except for RY/BY#) are
placed in the high impedance state.
Table 4. Am29PDL640G Sector Architecture
Bank
Sector
SA0
SA1
SA2
SA3
SA4
SA5
SA6
SA7
SA8
SA9
SA10
SA11
SA12
SA13
SA14
SA15
SA16
SA17
SA18
SA19
SA20
SA21
SA22
Sector
Address
A21–A12
0000000000
0000000001
0000000010
0000000011
0000000100
0000000101
0000000110
0000000111
0000001xxx
0000010xxx
0000011xxx
0000100xxx
0000101xxx
0000110xxx
0000111xxx
0001000xxx
0001001xxx
0001010xxx
0001011xxx
0001100xxx
0001101xxx
0001101xxx
0001111xxx
Sector
Size
(Kwords)
4
4
4
4
4
4
4
4
32
32
32
32
32
32
32
32
32
32
32
32
32
32
32
Address Range
00000h–00FFFh
01000h–01FFFh
02000h–02FFFh
03000h–03FFFh
04000h–04FFFh
05000h–05FFFh
06000h–06FFFh
07000h–07FFFh
08000h–0FFFFh
10000h–17FFFh
18000h–1FFFFh
20000h–27FFFh
28000h–2FFFFh
30000h–37FFFh
38000h–3FFFFh
40000h–47FFFh
48000h–4FFFFh
50000h–57FFFh
58000h–5FFFFh
60000h–67FFFh
68000h–6FFFFh
70000h–77FFFh
78000h–7FFFFh
February 26, 2003
Am29PDL640G
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