ML2240 datasheet(5/24 Pages) OKI

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FEDL2240DIGEST-02

OKI Semiconductor

ML2240 Family

5/24

Pin No.

Pin Symbol

I/O

Description

D4/STASEL

I/O

CPU interface data bus pin in the parallel input interface.

This pin becomes a data input pin when

WR is at "L" level. It becomes

a channel status output pin when

RD is at "L" level. It outputs a BUSY

signal for channel 1. For the serial input interface, it becomes a

channel status changeover pin. When D4/STASEL is at "L" level, the

D3/STA3-D0/STA0 pins output the NCR (Next Command Request)

for each channel. When the D4/STASEL is at "H" level, the

D3/STA3-D0/STA0 pins output

BUSY signals for their corresponding

channels.

D5/DO

I/O

CPU interface data bus pin in the parallel input interface.

This pin becomes a data input pin when

WR is at “L” level. It becomes

a channel status output pin when

RD is at “L” level. This pin outputs 2

channels of

BUSY signal.

When

CS and RD are at “L” level, this D5/DO pin serially outputs the

status of each channel in synchronization with D6/SCK clock.

D6/SCK

I/O

CPU interface data bus pin in the parallel input interface.

This pin becomes a data input pin when

WR is at "L" level. It becomes

a channel status output pin when

RD is at "L" level. It outputs a BUSY

signal for channel 3.

This pin becomes a serial clock input pin for the serial input interface.

When the SCK pin input is at "L" level on the falling edge of the

CS pin

signal, the DI pin input signal goes into the device on at the rising edge

of the SCK clock, and the data is output from the DO pin. When the

SCK pin input is at "H" level on the falling edge of the

CS pin signal,

the DI pin input signal goes into the device on the falling edge of the

SCK clock, and the data is output from the DO pin.

D7/DI

I/O

CPU interface data bus pin in the parallel input interface.

When

WR is at "L" level, it becomes a data input pin. When RD is at

"L" level, it becomes a channel status output pin. It outputs a

BUSY

signal for channel 4.

For the serial input interface, this pin becomes a serial data input pin.

Works as serial data input pin in the serial input interface.

DAOL

Outputs the left 14-bit DAC analog signal.

AOUTL

Outputs the left 14-bit DAC analog signal via voltage follower.

DAOR

Outputs the right 14-bit DAC analog signal.

AOUTR

Outputs the right 14-bit DAC analog signal via voltage follower.

RCS

“L” level: RA22-0, A-1, and

ROE pins output the address data and the

output enable signal.

“H” level: RA22-0, A-1, and

ROE pins are in high impedance.

ROE

Output enable pin for an externally connected memory.

RCS pin = “H” level: High impedance

SERIAL

CPU interface switching pin.

“H” level: Serial input interface, “L” level: Parallel input interface

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