MAX1403EVKIT Maxim Integrated Products, MAX1403EVKIT Datasheet - Page 14

• Manufacturer Part Number: MAX1403EVKIT
• Description: EVAL KIT FOR MAX1403
• Manufacturer: Maxim Integrated Products

Specifications of MAX1403EVKIT

• Number Of Adc's: 1
• Number Of Bits: 18
• Sampling Rate (per Second): 480
• Data Interface: Serial
• Inputs Per Adc: 6 Single Ended
• Input Range: ±VREF/gain
• Power (typ) @ Conditions: 16.9mW @ 480SPS
• Voltage Supply Source: Analog and Digital
• Operating Temperature: 0°C ~ 70°C
• Utilized Ic / Part: MAX1403
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

68L11D Module
The 68L11D module draws its power from a user-supplied
power source connected to terminal block J2. Note the
positive and negative markings on the board. Nominal
input voltages should be between +5V and +16V. The
input current requirement for the 68L11D module is typ-
ically 20mA plus the current drawn by the evaluation kit
(EV kit).
The V
CMOS regulator. Trim potentiometer R2 sets the supply
voltage, with an adjustment range of approximately 2.5V
to 5V. Although the board is designed primarily for 3V
applications, all of the circuitry is rated to withstand 5V
levels.
U1 is Motorola’s 68L11D µC. Contact Motorola for µC
information, development, and support.
A MAX708R supervisory circuit on the module monitors
the V
and produces a reset pulse whenever the manual reset
button (SW2) is pressed. Note that the MAX708R resets
the CPU if the supply voltage falls below 2.66V.
The module provides 32kbytes of external CMOS static
RAM (U5).
The 74HCT245 octal buffer (U6) provides access to an
eight-bit port on the 40-pin interface connector. This
memory-mapped port consists of Intel-compatible read
and write strobes, four chip selects, four address
LSB's, and eight data bits. Table 3 lists the address
ranges for each of the memory-mapped elements on
the 68L11D module.
The MAX3232 is a 3V-powered, RS-232 interface volt-
age-level shifter. Its built-in charge pump uses external
capacitors to generate the output voltages necessary
to drive RS-232 lines.
2
_______________Detailed Description
_______________________________________________________________________________________
DD
DD
logic supply, generates the power-on reset,
supply is set by U4, a MAX667 low-dropout
68L11D Microcontroller (µC)
Power Requirements
Module Hardware
The 20 x 2-pin header (J1) connects the 68L11D mod-
ule to a Maxim EV kit. Table 2 lists the function of each
pin. Use the 68L11D module only with EV kits that are
designed to support it, and download only code that is
targeted for the Maxim 68L11D module. Downloading
incorrect object code into the 68L11D module will pro-
duce unpredictable results.
The 8k x 8 boot ROM (U10) checks the system and
waits for commands from the host. Refer to the EV kit
manual for specific startup procedures.
All software is supplied on a disk with the EV kit.
Software operating instructions are included in the EV
kit manual.
J3 is an RS-232 serial port, designed to be compatible
with the IBM PC 9-pin serial port. Use a straight-through
DB9 male-to-female cable to connect J3 to the IBM PC
serial port. If the only available serial port has a 25-pin
connector, use a standard 25-pin to 9-pin adapter.
Table 1 shows J3’s pinout. The hardware-handshake
lines are used by the evaluation software to confirm that
the EV kit is connected to the correct serial port.
Table 1. Serial Communications Port J3
PIN
1
2
3
4
5
6
7
8
9
NAME
None
DCD
GND
RXD
DSR
TXD
DTR
RTS
CTS
Handshake; hard-wired to DTR and DSR
RS-232-compatible data output from
68L11D module
RS-232-compatible data input to
68L11D module
Handshake; hard-wired to DCD and DSR
Signal ground connection
Handshake; hard-wired to DCD and DTR
Handshake; hard-wired to CTS
Handshake; hard-wired to RTS
Unused
Serial Communications
FUNCTION
Software