FEDL2280XFULL-04

ML22808/ML22804/Ml22802-XXX

2.

PUP2 command

• command

0

0

0

1

⎯

⎯

S1

S0

PUP2 command is used to shift the ML22804/ML22808-xxx from the power down state to the command

standby state.

In the power down state, any command input other than PUP1 and PUP2 will be ignored.

The ML22804/ML22808-xxx enters the power down state in any of the following conditions:

1) When power is turned on

2) At

RESET input

3) When both NCR and

BUSY go to a “H” level after inputting the power down command.

The relationship between S1/S0 and the memory bank is as follows.

S1

S0

ML22808/ML22804/ML22P808/ML22P804

ML22802/ML22P802

0

0

Uses the entire space of the internal memory.

Uses the entire space of the internal memory.

0

1

Divides the internal memory into two areas to

switch the memory areas with the SEL0 pin.

Setting prohibited (fix S0 to “0”)

1

0

Divides the internal memory into four areas to

switch the memory areas with the SEL0 and

SEL1 pins.

Divides the internal memory into two areas to

select the memory areas with the SEL pin.

1

1

Setting prohibited (Operation is the same as

above.)

Setting prohibited (Fix S0 to “0”.)

CS

Status

Oscillation stabilized

Pop noise is being

suppressed

SCK

DI

NCR

BUSY

Power down

XT

•XT

Oscillating

Oscillation stopped

AOUT

GND

1V

Awaiting command

The oscillation starts when the PUP2 command is input and, after an elapse of about 2 ms oscillation

stabilization time, the AOUT output gradually changes from GND level to approx. 1 V level in about 64 ms.

Any command that is input during oscillation stabilization will be ignored.

However, if a “L” level is input to

the

RESET pin, the device enters the power down state immediately.

T

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