rsc-4128 ETC-unknow, rsc-4128 Datasheet - Page 31

• Manufacturer Part Number: rsc-4128
• Description: Speech Recognition Processor
• Manufacturer: ETC-unknow

Data Sheet
Full-Scale Mode (Output range 0v to Vdd- 1 LSB)
Decimal
Equivalent
-512
-511
-510
-509
-508
-2
-1
0
+1
+2
+3
+4
+510
+511
The translation in Full-Scale mode is:
R2R[9] = dac[7] inverted
R2R[8:2] = dac[6:0]
R2R[1:0] = anCtl[5:4]
Half-Scale Mode (Output range Vdd/4 to 3Vdd/4- 1 LSB)
Decimal
Equivalent
-256
-255
-254
-253
-252
-2
-1
0
+1
+2
+3
+4
+254
+255
The translation in Half-Scale mode is:
R2R[9] = dac[7] inverted
R2R[8:1] = dac[7:0]
R2R[0] = anCtl[5]
DAC Power Control
The DAC has no explicit power control. It is turned off (placed into lowest current mode) by loading the value 80H
into the DAC hold register, and 0 into the LSB1 and LSB0 bits of the Analog Control Register (register EF.Bits[5:4]).
Note: register EF.Bit7 (“-anCtl” must be “0” in the value being written to register EF, when writing
EF.Bits[5:0].
31
DAC hold
reg[7:0] (hex)
80H
80H
80H
80H
81H
FFH
FFH
00H
00H
00H
00H
01H
7FH
7FH
DAC hold
reg[7:0] (hex)
80H
80H
81H
81H
82H
FFH
FFH
00H
00H
01H
01H
02H
7FH
7FH
Analog Cntrl
[5:4] (binary)
00
01
10
11
00
10
11
00
01
10
11
00
10
11
Analog Cntrl
[5:4] (binary)
0x
1x
0x
1x
0x
0x
1x
0x
1x
0x
1x
0x
0x
1x
Digital input
000H
001H
002H
003H
004H
1FEH
1FFH
200H
201H
202H
203H
204H
3FEH
3FFH
Digital Input
100H
101H
102H
103H
104H
1FEH
1FFH
200H
201H
202H
203H
204H
2FEH
2FFH
P/N 80-0206-R
0V
0V+ 1 LSB
Vdd/2- 1 LSB
Vdd/2
Vdd/2+ 1LSB
Vdd- 1LSB
Vdd/4
Vdd/4+ 1 LSB
Vdd/2- 1LSB
Vdd/2+ 1LSB
3Vdd/4-1 LSB
Analog Voltage output
General
Analog Voltage output
General
Vdd/2
0-3V (approx)
0.000V
0.003V
0.006V
0.009V
0.012V
1.497V
1.500V
1.503V
2.994V
2.997V
0-3V (approx)
0.750V
0.753V
0.756V
0.759V
0.762V
1.497V
1.500V
1.503V
2.244V
2.247V
© 2006 Sensory Inc.
RSC-4128