Z8 Encore! XP® 4K Series
Product Specification
125
ANAIN[3:0]—Analog Input Select
These bits select the analog input for conversion. Not all Port pins in this list are available
in all packages for the Z8 Encore! XP® 4K Series. Refer to the chapter Pin Description on
page 7 for information regarding the Port pins available with each package style. Do not
enable unavailable analog inputs. Usage of these bits changes depending on the buffer
mode selected in ADC Control/Status Register 1.
For the reserved values, all input switches are disabled to avoid leakage or other undesir-
able operation. ADC samples taken with reserved bit settings are undefined.
SINGLE-ENDED:
0000 = ANA0 (transimpedance amp output when enabled)
0001 = ANA1 (transimpedance amp inverting input)
0010 = ANA2 (transimpedance amp non-inverting input)
0011 = ANA3
0100 = ANA4
0101 = ANA5
0110 = ANA6
0111 = ANA7
1000 = Reserved
1001 = Reserved
1010 = Reserved
1011 = Reserved
1100 = Hold transimpedance input nodes (ANA1 and ANA2) to ground.
1101 = Reserved
1110 = Temperature Sensor.
1111 = Reserved.
DIFFERENTIAL (non-inverting input and inverting input respectively):
0000 = ANA0 and ANA1
0001 = ANA2 and ANA3
0010 = ANA4 and ANA5
0011 = ANA1 and ANA0
0100 = ANA3 and ANA2
0101 = ANA5 and ANA4
0110 = ANA6 and ANA5
0111 = ANA0 and ANA2
1000 = ANA0 and ANA3
1001 = ANA0 and ANA4
1010 = ANA0 and ANA5
1011 = Reserved
1100 = Reserved
1101 = Reserved
1110 = Reserved
1111 = Manual Offset Calibration Mode
PS022815-0206
Analog-to-Digital Converter
ZILOG [ ZILOG, INC. ]
