AMBE-1000 Digital Voice Systems, Inc., AMBE-1000 Datasheet - Page 31

• Manufacturer Part Number: AMBE-1000
• Manufacturer: Digital Voice Systems, Inc.

3.4.3
CHS_O_STRB
CHS_I_STRB
CHS_O_CLK
The AMBE-1000 is not recommended for new designs.
CHS_I_CLK
CHS_OBF
CHS_IBF
CHS_DO
Please refer to the AMBE-2000/2020 product line.
CHS_DI
EPR
DPE
Expanded Timing for Passive Serial Mode
Figure 3-L shows the expanded timing for passive serial mode.
strobe and clock signals are inputs. Once again EPR and DPE mark the beginnings of
the 20msec. frames. Unlike active mode, CHS_IBF and CHS_OBE must be monitored
between strobe pulses, unless there are at least 350 clock cycles of CLK_I between
strobe pulses, in which case CHS_IBF and CHS_OBE can be ignored. As in active mode
the number of words transferred per frame is dependant on the voice data rate and the
number of data bits per word selected in Table 3-A. See section 4 for the format of this
data.
Figure 3-L Expanded Timing for Passive Serial Mode
The AMBE-1000 is not recommended for new designs.
B15
B15
1st Word
1st Word
Please refer to the AMBE-2000/2020 product line.
B14
B14
B0
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B0
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20 msecs
20 msecs
B15
B15
2nd Word
2nd Word
guaranteed between CHS_O_STRB pulses.
guaranteed between CHS_I_STRB pulses.
CHS_IBF can be ignored if a minimum of 350 clocks of CLK_I can be
CHS_OBF can be ignored if a minimum of 350 clocks of CLK_I can be
B14
B14
B0
B0
In this mode both
B15
B15
Nth Word
B14
Nth Word
B14
B0
B0