ml50000 Oki Semiconductor, ml50000 Datasheet - Page 8

• Manufacturer Part Number: ml50000
• Description: Echo Canceler
• Manufacturer: Oki Semiconductor

¡ Semiconductor
(4/5)
28-pin
SSOP
20
22
23
24
25
26
Pin
56-pin
QFP
34
36
37
38
39
40
Symbol
PWDWN
SYNCO
SCKO
WDT
RST
GC
Type
O
O
O
I
I
I
Power-down mode control when powered down.
During power-down mode, all input pins are disabled and output pins are
in the following states :
Reset after the power-down mode is released.
8 kHz sync signal for the PCM CODEC.
Connect to the SYNC pin and the PCM CODEC transmit/receive sync pin.
Leave it open if using an external SYNC.
Transmit clock signal (256 kHz) for the PCM CODEC.
Connect to the SCK pin and the PCM CODEC transmit/receive clock pin.
Leave it open if using an external SCK.
Reset signal.
Due to initialization, input signals are disabled for 100 ms after reset
(after RST is returned from L to H).
Input the basic clock during the reset.
Output pins during the reset are in the following states :
Not affected: X2, SYNCO, SCKO, IRLD, MCKO
Test program end signal.
This signal is output when the one cycle (8kHz) of processing is completed.
Leave it open.
Input signal by which the gain controller for the RIN input is
controlled and the RIN input level is controlled and howling is
prevented.
The gain controller adjusts the RIN input level when it is –10 dBm0 or
above. RIN input levels from –10 to –1.5 dBm0 will be suppressed to
–10 dBm0 in the attenuation range from 0 to 8.5 dB.
RIN input levels above –1.5 dBm0 will always be attenuated by 8.5 dB.
• Single Chip or Master Chip in a Cascade Connection
This pin is loaded in synchronization with the falling edge of the INT signal
or the rising edge of RST.
• Slave Chip in a Cascade Connection
"L": Power-down mode
"H": Normal operation mode
"L": Reset mode
"H": Normal operation mode
High impedance : SOUT, ROUT, PD0 to 15
"L": SYNCO, SCKO, MCKO
"H": OF1, OF2, X2
Holds the last state : WDT, IRLD
High impedance: SOUT, ROUT, PD0 to 15
"L": WDT
"H": OF1, OF2
"H": Gain control ON
"L": Gain control OFF
"H" is recommended for echo cancellation.
Fixed at "L"
Description
ML50000
8/26