Signal descriptions
M36L0T7050T2, M36L0T7050B2
2.20
VPPF Program Supply Voltage
V
is both a Flash control input and a Flash power supply pin. The two functions are
PPF
selected by the voltage range applied to the pin.
If V is kept in a low voltage range (0V to V
) V is seen as a control input. In this
PPF
PPF
DDQ
case a voltage lower than V
gives an absolute protection against Program or Erase,
PPLKF
while V
> V
enables these functions (see the M58LT128HTB datasheet for the
PPF
PP1
relevant values). V
is only sampled at the beginning of a Program or Erase; a change in
PPF
its value after the operation has started does not have any effect and Program or Erase
operations continue.
If V
is in the range of V
it acts as a power supply pin. In this condition V
must be
PPF
PPH
PPF
stable until the Program/Erase algorithm is completed.
2.21
VSS Ground
V
is the common ground reference for all voltage measurements in the Flash (core and
SS
I/O Buffers) and PSRAM chips.
Note:
The Flash memory device in a system should have their supply voltage (V
) and the
DDF
program supply voltage V
decoupled with a 0.1µF ceramic capacitor close to the pin
PPF
(high frequency, inherently low inductance capacitors should be as close as possible to the
package). See Figure 5: AC measurement load circuit. The PCB track widths should be
sufficient to carry the required V
program and erase currents.
PPF
12/22
NUMONYX [ NUMONYX B.V ]
