z89136 ZiLOG Semiconductor, z89136 Datasheet - Page 49
z89136
Manufacturer Part Number
z89136
Description
Low-cost Dtad Controller
Manufacturer
ZiLOG Semiconductor
Datasheet
1.Z89136.pdf
(66 pages)
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Zilog
ANALOG CONTROL REGISTER (ACR)
The Analog Control register is mapped to register EXT6 of
the DSP (Table 15). This read/write register is accessible
by the DSP only.
Field
MPX_DSP_INT0
Reserved
D/A_SamplingRate
DSP_port
Enable A/D
ConversionDone
StartConversion
A/D_SamplingRate
DS97TAD0300
f---------------
-edcb-----------
-----a98--------
--------76------
----------5-----
-----------4----
------------3---
-------------210
Position
Table 15. EXT6 Analog Control Register (ACR)
P R E L I M I N A R Y
Attrib
R/W
R/W
R/W
R/W
R/W
R/W
W
W
R
R
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.
Value
11x
101
100
010
011
001
000
11x
101
100
010
011
001
000
1
0
1
0
1
0
1
0
Low-Cost DTAD Controller
Z89135/136 (ROMless)
Label
P26
Timer3
Return “0”
No Effect
Reserved
Reserved
64 kHz
16 kHz
10 kHz
4 kHz
Reserved
User defined DSP
Outputs
A/D Enabled
A/D Disabled
No effect
Done
Not Done
Start
Wait Timer
Reserved
Reserved
128 kHz
64 kHz
32 kHz
16 kHz
8 kHz
1-49
1
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