Rainbow Electronics DS1680 - Manual (Page 4)

DS1680
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AVD, AVS (ADC Supply and Ground) – Power supply and ground for the ADC.
AIN0, AIN1 (Analog Inputs) – These pins are the analog inputs for the ADC.
V
REF
(Voltage Reference) – Reference voltage for the ADC.
X+, X- (Resistive Tablet X Plane Driver) – Connect to X-terminal of resistive tablet.
Y+, Y- (Resistive Tablet Y Plane Driver) – Connect to Y-terminal of resistive tablet.
CONVERT
– Assert to logic 1 to request sample from AIN0 or AIN1. Use with ANSELIN input.
ANSELIN (Analog Select Input) –
Assert to logic 0 to select AIN0. Assert to logic 1 to select AIN1.
Use with CONVERT input.
BHE (Bus High Enable Input) – Drive to logic 1 to select high byte (data bits 2–9). Drive to logic 0 to
select low byte (data bits 0–1). The lower 6 bits will all be zeros when asserted low.
PEN_SELECT (Pen Select Input) – Assert to logic 1 to select X- or Y- data output. Assert to logic 0 to
select AIN0 or AIN1 data output. Use with OUT_SELECT input.
OUT_SELECT (Output Select Input) – Assert to logic 0 to select AIN0 or X- data. Assert to logic 1 to
select AIN1 or Y- data. Use with PEN_SELECT input.
COEN (Chip Output Enable) – The COEN pin must be asserted low to enable the ADC data to be
read on D0–D7.
D0-D7 (Data Bus) – Data output from ADC.
AVG (Data Average Select Pin) – Logic 1 selects data average mode; logic 0 selects raw data mode.
NEW_DATA (New Data Indicator) – A logic 0 pulse indicates that new data packet is available on
D0–D7.
OSCIN (Oscillator Input) – Input for the ADC clock.
PEN_OFF (Pen Detection Output) – Indicates pen not detected. Logic 1 if pen is not detected.
PD_RESET (Power Down/Reset Input) – Assert logic 1 for
≥
10ns to reset. Hold at logic 1 for power-
down mode of the analog circuitry.