MT9300 データシートの表示（PDF） - Mitel Networks
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MT9300 Datasheet PDF : 29 Pages
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MT9300
Advance Information
Main Control Register 1
Main Control Register 2
Main Control Register 3
Main Control Register 4
Main Control Register 5
Main Control Register 6
Main Control Register 7
Main Control Register 8
Main Control Register 9
Main Control Register 10
Main Control Register 11
Main Control Register 12
Main Control Register 13
Main Control Register 14
Main Control Register 15
(EC group 1)
(EC group 2)
(EC group 3)
(EC group 4)
(EC group 5)
(EC group 6)
(EC group 7)
(EC group 8)
(EC group 9)
(EC group 10)
(EC group 11)
(EC group 12)
(EC group 13)
(EC group 14)
(EC group 15)
Read/Write Address:
Read/Write Address:
Read/Write Address:
Read/Write Address:
Read/Write Address:
Read/Write Address:
Read/Write Address:
Read/Write Address:
Read/Write Address:
Read/Write Address:
Read/Write Address:
Read/Write Address:
Read/Write Address:
Read/Write Address:
Read/Write Address:
401H
402H
403H
404H
405H
406H
407H
408H
409H
40AH
40BH
40CH
40DH
40EH
40FH
76543210
unused unused unused MTDBI MTDAI Format LAW PWUP
Reset Value:
00H.
Bit
Name
Description
7-5
unused Unused Bits.
4
MTDBI Mask Tone Detector B Interrupt: When high, the Tone Detector interrupt output from
Echo Canceller B is masked. The Tone Detector operates as specified in Echo
Canceller B, Control Register 2.
When low, the Tone Detector B Interrupt is active.
3
MTDAI Mask Tone Detector A Interrupt: When high, the Tone Detector interrupt output from
Echo Canceller A is masked. The Tone Detector operates as specified in Echo
Canceller A, Control Register 2.
When low, the Tone Detector A Interrupt is active.
2
Format ITU-T/Sign Mag: When high, both Echo Cancellers A and B for a given group, select
ITU-T (G.711) PCM code.
When low, both Echo Cancellers A and B for a given group, select sign-magnitude
PCM code.
1
LAW
A/µ Law: When high, both Echo Cancellers A and B for a given group, select A-Law
companded PCM code.
When low, both Echo Cancellers A and B for a given group, select m-Law companded
PCM code.
0
PWUP Power-UP: When high, both Echo Cancellers A and B and Tone Detectors for a given
group, are active.
When low, both Echo Cancellers A and B and Tone Detectors for a given group, are
placed in Power Down mode. In this mode, the corresponding PCM data are bypassed
from Rin to Rout and from Sin to Sout with two frames delay.
When the PWUP bit toggles from zero to one, the echo cancellers A and B execute
their initialization routine which presets their registers, Base Address+00H to Base
Address+3FH, to default Reset Value and clears the Adaptive Filter coefficients.
Two frames are necessary for the initialization routine to execute properly. Once the
initialization routine is executed, the user can set the per channel Control Registers for
their specific application.
20
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