BYTE-WIDE SMART 5 FlashFile™ MEMORY FAMILY
To protect programmed data, each block can be
locked. This block locking mechanism uses
The Automatic Power Savings (APS) feature
a
substantially reduces active current when the
device is in static mode (addresses not switching).
In APS mode, the typical ICCR current is 1 mA.
combination of bits, block lock-bits and a master
lock-bit, to lock and unlock individual blocks. The
block lock-bits gate block erase and program
operations, while the master lock-bit gates block
lock-bit configuration operations. Lock-bit config-
uration operations (Set Block Lock-Bit, Set Master
Lock-Bit, and Clear Block Lock-Bits commands) set
and clear lock-bits.
When CE# and RP# pins are at VCC
, the
component enters a CMOS standby mode. Driving
RP# to GND enables a deep power-down mode
which significantly reduces power consumption,
provides write protection, resets the device, and
clears the status register. A reset time (tPHQV) is
required from RP# switching high until outputs are
The status register and RY/BY# output indicate
whether or not the device is busy executing or
ready for a new command. Polling the status
register, system software retrieves WSM feedback.
The RY/BY# output gives an additional indicator of
WSM activity by providing a hardware status signal.
Like the status register, RY/BY#-low indicates that
the WSM is performing a block erase, program, or
lock-bit configuration. RY/BY#-high indicates that
the WSM is ready for a new command, block erase
is suspended (and program is inactive), program is
suspended, or the device is in deep power-down
mode.
valid. Likewise, the device has a wake time (tPHEL
)
from RP#-high until writes to the CUI are
recognized.
1.3
Pinout and Pin Description
The family of devices is available in 40-lead TSOP
(Thin Small Outline Package, 1.2 mm thick) and
44-lead PSOP (Plastic Small Outline Package).
Pinouts are shown in Figures 2 and 3.
DQ - DQ
0
7
Input
Buffer
Output
Buffer
Identifier
Register
I/O Logic
V
CC
CE#
WE#
OE#
RP#
Status
Register
Command
Register
Data
Comparator
4-Mbit:
8-Mbit:
16-Mbit: A - A
A
A
- A
- A
,
,
0
0
0
18
19
20
Y
Input
Buffer
RY/BY#
Y Gating
Write State
Machine
Decoder
Program/Erase
Voltage Switch
V
PP
4-Mbit: Eight
8-Mbit: Sixteen
16-Mbit: Thirty-Two
64-Kbyte Blocks
V
GND
Address
Latch
X
CC
Decoder
Address
Counter
Figure 1. Block Diagram
6
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