M29W320EB NUMONYX [Numonyx B.V], M29W320EB Datasheet - Page 15

• Manufacturer Part Number: M29W320EB
• Description: 32 Mbit (4Mbx8 or 2Mbx16, Uniform Parameter Blocks, Boot Block) 3V supply Flash memory
• Manufacturer: NUMONYX [Numonyx B.V]

M29W320ET, M29W320EB
2.10
2.11
2.12
2.13
Ready/Busy Output (RB)
The Ready/Busy pin is an open-drain output that can be used to identify when the device is
performing a Program or Erase operation. During Program or Erase operations Ready/Busy
is Low, V
Erase Suspend mode.
After a Hardware Reset, Bus Read and Bus Write operations cannot begin until Ready/Busy
becomes high-impedance. See
ac
The use of an open-drain output allows the Ready/Busy pins from several memories to be
connected to a single pull-up resistor. A Low will then indicate that one, or more, of the
memories is busy.
Byte/word Organization Select (BYTE)
The byte/word Organization Select pin is used to switch between the x8 and x16 Bus modes
of the memory. When byte/word Organization Select is Low, V
when it is High, V
V
V
The Command interface is disabled when the V
voltage, V
during power up, power down and power surges. If the Program/Erase Controller is
programming or erasing during this time then the operation aborts and the memory contents
being altered will be invalid.
A 0.1µF capacitor should be connected between the V
Ground pin to decouple the current surges from the power supply. The PCB track widths
must be sufficient to carry the currents required during Program and Erase operations, I
V
V
must be both connected to the system ground.
CC
SS
CC
SS
waveforms.
is the reference for all voltage measurements. The device features two V
provides the power supply for all operations (Read, Program and Erase).
Ground
Supply voltage
OL
LKO
. Ready/Busy is high-impedance during Read mode, Auto Select mode and
. This prevents Bus Write operations from accidentally damaging the data
IH
, the memory is in x16 mode.
Table 16
and
Figure 15: Reset/Block Temporary Unprotect
CC
Supply voltage is less than the Lockout
CC
Supply voltage pin and the V
IL
, the memory is in x8 mode,
Signal descriptions
SS
pins which
SS
15/63
CC3
.