28F1602C3, 28F1604C3, 28F3204C3
2
Preliminary
program and erase operations, including verification, thereby unburdening the microprocessor or
microcontroller. The flash’s status register indicates the status of the WSM by signifying block
erase or word program completion and status.
Flash program and erase automation allows program and erase operations to be executed using an
industry-standard two-write command sequence to the CUI. Program operations are performed in
word increments. Erase operations erase all locations within a block simultaneously. Both program
and erase operations can be suspended by the system software in order to read from any other flash
block. In addition, data can be programmed to another flash block during an erase suspend.
3 Volt Advanced+ Stacked-CSP memories offer two low-power savings features: Automatic
Power Savings (APS) for flash memory and standby mode for flash and SRAM. The device
automatically enters APS mode following the completion of a read cycle from the flash memory.
Standby mode is initiated when the system deselects the device by driving F-CE# and S-CS
1
# or
S-CS
2
inactive. Power savings features significantly reduce power consumption.
The flash memory can be reset by lowering F-RP# to GND. This provides CPU-memory reset
synchronization and additional protection against bus noise that may occur during system reset and
power-up/-down sequences.
1.3
Package Ballout
72-
NOTE:
Flash upgrade address lines are shown for A
(64-Mbit flash) and A
(128-Mbit flash). In all flash and
SRAM combinations, 66 balls are populated (A
21
and A
22
are not populated). Location A
10
is “NC” on
16/2 devices only.
Figure 1. 72-Ball Stacked Chip Scale Package
1
2
3
4
5
6
7
8
A
B
C
D
E
F
G
H
NC
A
20
A
11
A
15
A
14
A
13
A
12
A
16
A
8
A
10
A
9
DQ
15
S-WE#
F-WE# NC
A
21
DQ
13
DQ
6
S-V
SS
F-WP# V
PP
A
19
DQ
11
DQ
10
S-LB# S-UB# S-OE#
DQ
9
DQ
8
A
18
A
17
A
7
A
6
A
3
A
2
NC
NC
A
5
A
4
A
0
F-CE# F-V
SS
F-RP# A
22
DQ
12
S-CS
2
9
10
11
12
F-V
SS
NC
DQ
14
DQ
7
DQ
4
DQ
5
DQ
2
DQ
3
DQ
0
DQ
1
A
1
S-CS
1
#
F-OE# NC
NC
S-V
CC
F-V
CC
Top View, Balls Down
F-V
CCQ