FEDL2215-01

1Semiconductor

ML2215

4/26

PIN DESCRIPTIONS

Pin

Symbol

Type

Description

17 (19)

RESET

l

“L” input to this pin turns the LSI into standby mode. At this point, output from

the AOUT pin rises up to V

input to the pin the AOUT output returns to 1/2 V

2 (4)

NAR

O

This pin outputs a signal showing empty/full status of the Phase Address

Latch Resister. “H” level indicates the register is empty, and thus the LSI is

ready to accept serial data input. At powering up, the pin outputs “H level”.

3 (5)

BUSY

O

Output “L” level while output signal is present either at the AOUT or MD pin.

At powering up, the pin outputs “H” level.

4 (6)

MD

O

Music output pin

7 (7)

V

REF

I

DAC reference pin. Leave this pin open when not used.

9 (9)

AOUT

O

Analog output pin

8 (8)

GND

—

Ground pin

12 (16)

CLK

l

External clock input pin

18 (20)

Sl

l

Serial clock input pin

19 (21)

SD

l

Serial data input pin. Input a phrase code corresponding to a phrase address

through this pin.

13 (17)

ST

l

This pin is used when 3-pin interfacing is selected. When 3-pin inter-facing is

selected, input to the SD and Sl pins is valid while the

ST pin being held “L”.

When this pin is at “H” level, speech synthesis is started. When 2-pin

interfacing is selected, connect this pin to GND. Mask option allows the user

to select either 3-pin interfacing or 2-pin interfacing.

11 (15)

V

DD

—

Power supply pin. Insert 0.1

µF or larger bypass capacitor between this pin

and the GND pin.

* 20-pin plastic SSOP (24-pin plastic SOP)