ml2251 Oki Semiconductor, ml2251 Datasheet - Page 12

• Manufacturer Part Number: ml2251
• Description: 2-channel Mixing Oki Adpcm Algorithm-based Speech Synthesis Lsi
• Manufacturer: Oki Semiconductor

QFP Pin
OKI Semiconductor
17, 31,
13, 40
7, 8
24
26
28
29
32
36
37
42
30
27
39
2
6
C6, D1, E2
WCSP pin
B3, A4
B5, C1
C4
E3
D2
E1
C2
B1
A3
F5
F3
F1
F2
F4
OPTANA
TESTO1
TESTO2
D6/SCK
SERIAL
Symbol
AGND
DGND
AOUT
D7/DI
DV
AV
DAO
WR
DW
CS
RD
DD
DD
Type
I/O
I/O
—
—
—
—
O
O
O
I
I
I
I
I
I
CPU interface data bus pin in the parallel input interface.
Usually outputs “L” level when RD = “L” level.
Works as serial clock input pin in the serial input interface.
When the SCK input is at “L” level on the falling edge of CS , the DI
input is captured in the device on the rising edge of SCK clock.
And when the SCK input is at “H” level on the falling edge of CS ,
the DI input is captured on the falling edge of SCK clock.
CPU interface data bus pin in the parallel input interface.
Usually output “L” level when RD is at “L” level.
Works as serial data input pin in the serial input interface.
DAO pin outputs analog signal of 14-bit DAC.
AOUT pin usually outputs the analog signal of 14-bit DAC via
voltage follower.
CPU interface switching pin.
Serial input interface at “H” level. And parallel input interface at “L”
level.
CPU interface chip select pin.
When CS pin is at “H” level, the WR , DW , and RD signals cannot
be input to the device.
Keep this pin “L” level. The analog signal of 14-bit DAC is output
from DAO pin and from AOUT pin via voltage follower.
CPU interface write signal.
When CS pin is at “H” level, the WR signal cannot be input to the
device.
Data write signal when using EXT command for the voice output.
Set the pin to “H” level when not using EXT command.
When CS pin is at “H” level, the DW signal cannot be input to the
device.
This pin has a pull-up resistor built in.
CPU interface read signal.
When CS pin is at “H” level, the RD signal cannot be input to the
device.
This pin has a pull-up resistor built in.
Output pin for testing.
Keep this pin open.
Analog power supply pin.
Insert a 0.1 µ F or larger bypass capacitor between this pin and
AGND pin.
Digital power supply pin.
Insert a 0.1 µ F or larger bypass capacitor between this pin and
DGND pin.
Analog ground pin.
Digital ground pin.
Description
FEDL2250DIGEST-06
ML2250 family
12/35