z89138 ZiLOG Semiconductor, z89138 Datasheet - Page 49

• Manufacturer Part Number: z89138
• Description: Voice Processing Controllers
• Manufacturer: ZiLOG Semiconductor

Zilog
ANALOG CONTROL REGISTER (ACR)
The Analog Control register is mapped to register EXT6 of
the DSP (Table 17). This read/write register is accessible
by the DSP only.
MPX_DSP_INT0
Reserved
Reserved
D/A_SamplingRate-------8--------
DSP_port (DSP1,
DSP0)
Enable A/D
ConversionDone
StartConversion
Reserved
20/29 MHz Select --------------1-
A/D_SamplingRate---------------0
Notes:
* Default value
† Optional feature
DS97TAD0201
Field
f---------------
-edcba----------
------9---------
--------76------
----------5-----
-----------4----
------------3---
-------------2--
Position
Table 17. EXT6 Analog Control Register (ACR)
Attrib
R/W
R/W
R/W
R/W
R/W
R/W
R/W
W
W
W
W
R
R
R
R
P R E L I M I N A R Y
Value
1
0
0
1
1
0
1
0
1
0
1
0
1
0
The 16-bit field of EXT6 defines modes of both the A/D and
the D/A. The High Byte configures the D/A while the Low
Byte controls the A/D mode.
P26
Timer3
Return “0”
No effect
Return “1”
No effect
User-defined DSP
outputs
A/D Enabled
A/D Disabled
No effect
Done
Not Done
Start
Wait Timer
Return “0”
No effect
29.49 MHz*
20.48 MHz†
Label
Voice Processing Controllers
16 kHz
10 kHz
16 kHz
8 kHz
20.48
MHz
Z89138/Z89139
8.04 kHz
9.6 kHz
9.6 kHz
16 kHz
29.49
MHz*
49
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