E297S Atmel, E297S Datasheet - Page 2

• Manufacturer Part Number: E297S
• Description: BOARD PROGRAMMING AND TEST
• Manufacturer: Atmel
• Series: Quantumr

Specifications of E297S

• Rohs Status: RoHS non-compliant
• Other names: 427-1040

Power Connector
Board
This screw terminal strip can be used to power the board. The voltage should be between
Details
+8 and +20 volts DC. Power should be free from switching noise and short-term fluctua-
tions for best performance.
Sense Connector
This 2-pin polarized header provides the interface to the sensing electrode. One pin is
board ground and should be connected to the shield of the cable (if shielded). The other is
the signal line which should be directly connected to the sense electrode.
RS232 Connector
This connector provides bi-directional communications between the E297s and an exter-
nal host, like a PC. It allows full control over the device including calibration and Setups. It
also allows for real-time downloading of signal and reference information. QTWinview
software makes use of this connector.
Gain Jumper
This 2-position jumper controls the gain of the opamp circuit. The 'Hi' position has 16x
higher gain than the 'Lo' position. Refer to the schematic diagram and the QT9701B2
datasheet for further details.
Sampled Analog Output
This 2-pin header connector labeled 'ANA OUT’ provides the sampled analog output
signal from the QTM2000 module. This signal can be fed into an ADC for further process-
ing. Note that long wire lengths on this connection can cause the opamp of the QTM2000
to break into high frequency oscillation, and sometimes only at certain output voltage
levels. If this happens, add additional series-R inline with ANA to the wiring from this
connection.
Clone Connectors
There are two clone connectors: Clone in and clone out. These are for use with the
QTM1001CA cloning adaptor which can take setting from the QTM2000 module and copy
them into additional modules or, copy in from another E297S, E97S, or E2SR board. The
cloning mechanism provides for stand-alone duplication of Setup parameters stored in the
eeprom (but not calibration data). The clone out connector is compatible with the
QTM1001CA’s cloning cable, while the clone-in port is compatible with the QTM1001CA’s
‘pogo pins’.
Inbound cloning is accomplished during power up; when the power to the QTM2000
comes up it checks for the presence of a cloning adaptor and if present, absorbs the infor-
mation from it. Inbound cloning can also take place after the OBJ button is momentarily
pressed while the cloning source is present.
Outbound cloning from the E297S can take place only when the OBJ buttons is held down
while powered.
SPI Port
This output-only port allows transfers of data, such as signal levels and module status, to
off-board peripherals which can take clocked data. Possible targets include shift registers
and SPI peripherals like DACs. The signals available are the same as those available on
the Analog port connector, but in clocked-digital form. Refer to the QT9701B2 datasheet
for data format and clocking details. The pinout of this connector is shown in the
schematic.
BG Button
This button controls the recalibration of the Background level of the sensor. It is the
primary control for setting the reference point and recalibrating the device. Pushing this
button will normally act to recenter the signal and its reference level at the desired refer-
ence offset according to Setup 2, Reference Offset, in the Setups table in this guide.
A great deal more is written about the BG and OBJ functions in Section 3 of the
QT9701B2 datasheet.
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E E 297S