MAX195EVKIT-DIP Maxim Integrated, MAX195EVKIT-DIP Datasheet - Page 6

• Manufacturer Part Number: MAX195EVKIT-DIP
• Description: Data Conversion IC Development Tools Programmers, Development Systems
• Manufacturer: Maxim Integrated
• Series: MAX195r

Specifications of MAX195EVKIT-DIP

• Interface Type: QSPI, Serial (SPI, Microwire)
• Factory Pack Quantity: 1

The MAX194 may be interfaced using a bit-pushing
algorithm, such as the following:
1) Verify that EOC is low before starting the conversion.
2) Assert CONV low to begin conversion.
3) Wait until EOC becomes high. Conversion has
4) Set CONV high.
5) Wait until EOC becomes low. Conversion is com-
6) Assert SCLK low.
7) Assert CS low.
8) Clear the 16-bit result register.
9) Repeat 16 times:
10) Set CS high.
When the MAX194 is installed in an environment with an
unregulated temperature, thermal variation can cause
DC offset errors. Transients on the power supply or ref-
erence during the power-on calibration are also a
source of DC offset error. These errors can be eliminat-
ed by performing re-calibration, as outlined below:
1) Assert the MAX194 RESET pin low.
2) Run the conversion clock until EOC becomes high.
3) Set the MAX194 RESET pin high.
4) Run the conversion clock until EOC becomes low.
For best accuracy, a typical application circuit should
allow time for the power supply and ambient tempera-
ture to settle before re-calibrating the MAX194. Refer to
the Calibration section of the MAX194 data sheet.
MAX194 Evaluation System/Evaluation Kit
Table 5. QSPI Receive Format for MAX194
6
ADDR
RR0
RR1
begun.
plete.
9-1. Set SCLK high.
9-2. Rotate the 16-bit result register left.
9-3. Read DOUT into least significant bit of the
9-4. Assert SCLK low.
_______________________________________________________________________________________
Using Bit-Pushing to Read the MAX194
result register.
15
x
x
Reset and Calibration Procedure
14
x
x
13
x
x
12
x
x
11
x
x
10
x
x
B5
9
x
B4
8
x
Several jumper blocks allow different configurations of
the MAX194. Jumper functions are listed in Table 6.
See the Voltage Reference and Measuring Supply
Current sections.
The 68HC16 module and MAX194 communicate
through the QSPI port on the 40-pin data connector.
Table 7 lists the function of each pin.
Table 6. Jumper Settings
_Detailed Description of Hardware
JUMPER
B13
B3
JU1
JU3
JU4
JU5
JU6
JU7
7
B12
B2
6
POSITION
Closed
Open
“OSC”
“EXT”
“QSPI”
“QSPI”
“GND”
“QSPI”
“CONT”
Open
Closed
“SHDN”
“AUTO”
“UNI”
Open
B11
B1
5
Data Connector Interface
Ground the SCLK pin.
Allows the SCLK pin to be driven by
the user.
Conversion clock is driven by crystal
oscillator U4.
Conversion clock is driven by the
EXTCLK input pad.
Conversion clock is driven by the
QSPI serial clock.
Connects CS to QSPI chip-select
PCS0.
Connects CS to ground; data output
is always enabled.
Connects CONV to QSPI chip-select
PCS0.
Connects CONV to EOC for continu-
ous conversion mode.
Normal operating mode.
Momentary closure resets and
re-calibrates the MAX194. Do not
close this jumper if the µC module is
connected.
Select shutdown mode.
Lets 68HC16 drive the BP/UP/SHDN
pin. If no µC is connected, bipolar
input mode is selected.
Select unipolar mode.
Select bipolar mode.
B10
B0
4
sub
B9
3
FUNCTION
Jumper Options
sub
B8
2
B7
1
x
B6
0
x