msm7581 Oki Semiconductor, msm7581 Datasheet - Page 4

• Manufacturer Part Number: msm7581
• Description: Itu-t G.721 4ch Adpcm Transcoder
• Manufacturer: Oki Semiconductor

¡ Semiconductor
PIN AND FUNCTIONAL DESCRIPTIONS
GND
Ground, 0 V.
SIP1, SOP1
PCM serial data input (SIP1) and output (SOP1) for Channel 1.
SOP1 is an open-drain output, which goes into a high impedance state after a continuous 8-bit
serial data output.
SIP2, SOP2
PCM serial data input (SIP2) and output (SOP2) for Channel 2.
SOP2 is an open-drain output, which goes into a high impedance state after a continuous 8-bit
serial data output.
SIP3, SOP3
PCM serial data input (SIP3) and output (SOP3) for Channel 3.
SOP3 is an open-drain output, which goes into a high impedance state after a continuous 8-bit
serial data output.
SIP4, SOP4
PCM serial data input (SIP4) and output (SOP4) Channel 4.
SOP4 is an open-drain output, which goes into a high impedance state after a continuous 8-bit
serial data output.
PAD10 - PAD40, PAD11 - PAD41
PAD mode control.
The PCM output can be attenuated by 12 dB or 6 dB and set to an out-of-service pattern (idle
pattern) by controlling these pins. Set these pins to digital "0" level during normal operation.The
control sequences are as follows:
PAD11 - PAD41
0
0
1
1
PAD10 - PAD40
0
1
0
1
Normal
6 dB Loss
12 dB Loss
Out-of-service Pattern
MSM7581
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