FEDL2240DIGEST-02

OKI Semiconductor

ML2240 Family

16/24

Power Down Function

In power down state, the power down function in the device stops the internal operation and oscillation, sets

AOUT to GND, and minimizes the static Idd.

Figure below shows the equivalent circuit of

XT and XT pins.

Channel Status

Channel status is of 2 types: NCRn and

BUSYn.

Channel

Channel status

CH1

NCR1

BUSY1

CH2

NCR2

BUSY2

CH3

NCR3

BUSY3

CH4

NCR4

BUSY4

NCRn = “H” indicates that it is possible to input the PLAY, START, and MUON commands for the phrase to be

played back next for channel n.

BUSYn = “H” indicates a state in which channel n has not performed voice processing. BUSYn = “L” indicates a

state in which channel n is performing voice processing.

Meanwhile, after a command is input, the NCR and

BUSY signals of all channels are at “L” level during the

processing of the command.

For Status output methods, see the Micro-computer Interface section.

1 M

Ω approx.

RESET

External input

To master clock inside the device

XT

“L”

XT

“L”