FEDL2302DIGEST-05
OKI Semiconductor
ML2302
PIN DESCRIPTIONS
Pin
Pin
(TQFP)
Symbol
D7 to 0
WR
Type
I/O
I
Description
(WCSP)
H2, G2,
F2, G1,
F3, F1,
E2, E1
Bidirectional data bus.
Command and data inputs from an external microcontroller and
memory, and status and data outputs to an external
microcontroller and memory.
1 to 8
47
Write pulse input pin. This pin pulses “L” when command or
voice data is input to D7 to D0 pins.
G7
Read pulse input pin. This pin pulses “L” when status or voice
data is output to D7 to D0.
H9
J2
48
64
63
RD
CS
I
I
I
Accepts write pulse and read pulse when this pin is “L”.
Voice data is input or output to and from D7 to D0 when this pin
is “H”.
G3
D/C
This pin outputs a “L” level during RECORDING, PLAYBACK,
or PAUSE.
H3
E7
62
41
BUSY
O
O
CBUSY
Accepts a command during this pin is “H”.
“H” indicates that there is no data in FIFO memory.
During playback, voice synthesis starts when EMP changes to
“L”. Active “H” can be changed to active “L”.
“H” level indicates that there is more than half of the FIFO
memory.
F8
F7
43
44
EMP
MID
O
O
“H” level indicates that FIFO memory is full of data. During
playback, this pin is “H” and data cannot be written in FIFO
memory. During recording, data is not written after FIFO
memory is full of data.
G9
45
FUL
O
Active “H” can be changed to active “L”.
This pin should be set at a “L” level normally and be set at a “H”
level when DMA is used.
F9
H5
42
55
CH
I
When DMA transfer is selected, “H” level DREQL outputs a
signal to request a DMA transfer. Active “H” can be changed to
active “L”.
DREQL
O
Input to DACKL a signal when DMA transfer is permitted by the
DMA controller. when DACKL is “L”, IOW and IOR signals are
accepted.
J5
56
DACKL
I
Active “L” can be changed to active “H” by command input.
If DMA transfer is not used, set this pin to “H” level.
Write pulse Input pin to write external memory data to ML2302
during DMA transfer. If DMA transfer is not used, set this pin to
“H” level.
G6
J6
54
53
IOW
IOR
I
I
Read pulse input pin to read data of ML2302 during DMA
transfer.
If DMA transfer is not used, set this pin to “H” level.
16-bit serial data input pin when external A/D converter is used.
If external A/D converter is not used, set this pin to “L” level.
16-bit serial data input pin when external D/A converter is used.
H4
G4
59
60
ADSD
DASD
I
O
5/24
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