Appendix A. LP3500 Specifications
Appendix A provides the specifications for the LP3500, and describes the conformal coating.
A.1 Electrical and Mechanical Characteristics
Figure A-1 shows the mechanical dimensions for the LP3500.
Figure A-1. LP3500 Dimensions
Table A-1 lists the electrical, mechanical, and environmental specifications for the LP3500.
Table A-1. LP3500 Specifications
Feature
|
LP3500
|
LP3510
|
Microprocessor
|
Rabbit 3000® at up to 7.4 MHz
|
EMI Reduction
|
Spectrum spreader for ultra-low EMI (radiated emissions)
|
Flash Memory
|
|
|
SRAM
|
|
|
Backup Battery
|
Socketed 3 V lithium coin Panasonic CR2330, 265 mA·h,
supports RTC and SRAM,
connection for user-supplied external battery
|
Keypad/Display
|
Supports optional LCD/keypad module with
7 keys and 122 × 32 graphic display
|
Digital Inputs
|
16: fully protected 0-36 V DC, can handle short spikes ±40 V
|
Digital Outputs
|
10: 8 sink up to 200 mA each, 36 V DC max.;
2 source up to 200 mA each, 36 V DC max.
|
Relay Output
|
|
|
Analog Inputs
|
- Eight single-ended or four differential inputs
- 1 MW input impedance
- Sampling rate up to 200 samples/s
- Eight software-controlled ranges from 0-1 V to 0-20 V DC
Single-Ended Inputs
- Resolution: 11 bits
- Accuracy: 8 bits
- 4 channels can be set individually for 4-20 mA with plug-in jumpers
- 1 channel has software-selectable voltage-monitoring option
Differential Inputs
- Resolution: 12 bits
- Accuracy: 9 bits
|
|
Analog Outputs
|
3 unfiltered pulse-width modulated,
1 kW output impedance
|
|
Serial Ports
|
6 shared high-speed, CMOS-compatible ports:
- 1 RS-485
- 3 RS-232 (one 5-wire and one 3-wire or three 3-wire), jumper option for logic-level outputs; one RS-232 port needs to have wake-up capability
- 1 logic-level serial interface for optional add-ons
- 1 asynchronous clocked serial port dedicated for programming
|
Serial Rate
|
Max. asynchronous baud rate = CLK/8
|
Real-Time Clock
|
|
Timers
|
Ten 8-bit timers (6 cascadable from the first),
one 10-bit timer with 2 match registers
|
Watchdog/Supervisor
|
|
Pulse-Width Modulators
|
10-bit free-running counter and four pulse-width registers
|
Power
|
3 V to 30 V DC
20 mA (max.) @ 7.4 MHz,
100 µA max. @ 2 kHz (with linear regulator turned off)
|
Operating Temperature
|
|
Humidity
|
|
Connectors
|
- 0.1" headers
- I/O and misc. signals: one 1 × 25, two 1 × 17 headers
- Display: one 2 × 13 header
- 2 mm headers
- Programming Port: one 2 × 5 header
- Serial Interface: one 2 × 4 socket
- Screw-terminal headers
- Relay: one 3-position screw-terminal header
|
Board Size
|
2.60" × 3.65" × 0.45"
(66 mm × 93 mm × 11 mm)
|
A.1.1 Exclusion Zone
It is recommended that you allow for an "exclusion zone" of 0.25" (6 mm) around the LP3500 in all directions when the LP3500 is incorporated into an assembly that includes other printed circuit boards. This "exclusion zone" that you keep free of other components and boards will allow for sufficient air flow, and will help to minimize any electrical or electromagnetic interference between adjacent boards. An "exclusion zone" of 0.12" (3 mm) is recommended below the LP3500. Figure A-2 shows this "exclusion zone."
Figure A-2. LP3500 "Exclusion Zone"
When using the LP3500 with the Prototyping Board, do not install any components in the prototyping area on the Prototyping Board between the LP3500 and the Prototyping Board.
A.1.2 Headers
The LP3500 uses 0.1" IDC headers at J1-J4 for physical connection to other boards. J5, the programming port, is a 2 × 5 header with a 2 mm pin spacing.
Figure A-3 shows the LP3500 footprint. These values are relative to the mounting hole.
Figure A-3. User Board Footprint for LP3500
A.2 Conformal Coating
The areas around the 32 kHz real-time clock crystal oscillator has had the Dow Corning silicone-based 1-2620 conformal coating applied. The conformally coated area is shown in Figure A-4. The conformal coating protects these high-impedance circuits from the effects of moisture and contaminants over time.
Figure A-4. LP3500 Areas Receiving Conformal Coating
Any components in the conformally coated area may be replaced using standard soldering procedures for surface-mounted components. A new conformal coating should then be applied to offer continuing protection against the effects of moisture and contaminants.
|
NOTE
|
For more information on conformal coatings, refer to Technical Note 303, Conformal Coatings.
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A.3 Jumper Configurations
Figure A-5 shows the header locations used to configure the various LP3500 options via jumpers.
Figure A-5. Location of LP3500 Configurable Positions
Table A-2 lists the configuration options.
Table A-2. LP3500 Jumper Configurations
Header
|
Description
|
Pins Connected
|
Factory
Default
|
|
|
A/D Converter Voltage/Current Measurement Options
|
|
Voltage Option
|
|
|
|
AIN0 4-20 mA Option
|
|
|
|
AIN1 4-20 mA Option
|
|
|
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AIN2 4-20 mA Option
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|
|
|
AIN3 4-20 mA Option
|
|
|
|
RxE RS-232/Logic Level Select
|
|
RS-232 Level
|
|
|
|
Logic Level
|
|
|
|
TxE RS-232/Logic Level Select
|
|
RS-232 Level
|
|
|
|
Logic Level
|
|
|
|
RxC RS-232/Logic Level Select
|
|
RS-232 Level
|
|
|
|
Logic Level
|
|
|
|
TxC RS-232/Logic Level Select
|
|
RS-232 Level
|
|
|
|
Logic Level
|
|
|
|
RxB RS-232/Logic Level Select
|
|
RS-232 Level
|
|
|
|
Logic Level
|
|
|
|
TxB RS-232/Logic Level Select
|
|
RS-232 Level
|
|
|
|
Logic Level
|
|
|
|
SRAM Size
|
|
128K
|
LP3510
|
|
|
512K
|
LP3500
|
|
|
Flash Memory Size
|
|
128K/256K
|
|
|
|
512K
|
|
|
|
Flash Memory Size
|
|
128K/256K
|
LP3500
|
|
|
512K
|
|
|
|
Flash Memory Bank Select
|
|
Normal Mode
|
|
|
|
Bank Mode
|
|
|
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Manufacturing Use
|
|
|
|
|
|
Manufacturing Use
|
|
|
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|
Manufacturing Use
|
|
|
|
|
NOTE
|
The jumper connections on header J3 are made using standard slip-on jumpers. All other jumper connections except those across JP11 and JP12 are made using 0 W surface-mounted resistors. 390 W current-limiting resistors are used on JP11 and JP12.
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A.4 Use of Rabbit 3000 Parallel Ports
Figure A-6 shows the Rabbit 3000 parallel ports.
Figure A-6. LP3500 Rabbit-Based Subsystems
Table A-3 lists the Rabbit 3000 parallel ports and their use in the LP3500.
Table A-3. Use of Rabbit 3000 Parallel Ports
Port
|
I/O
|
Signal
|
Output Function State
|
|
|
|
IN08
|
|
|
|
|
IN09
|
|
|
|
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IN10
|
|
|
|
|
IN11
|
|
|
|
|
IN12
|
|
|
|
|
IN12
|
|
|
|
|
IN14
|
|
|
|
|
IN15
|
|
|
|
|
Power Input Detect
|
Low when external power source is connected; high for battery
|
|
|
|
CLKA
|
Pulled up when not driven by programming port
|
|
|
|
IN04
|
|
|
|
|
IN05
|
|
|
|
|
IN06
|
|
|
|
|
IN07
|
|
|
|
|
LCD Buffer Enable
|
|
|
|
|
Serial Device Select
|
|
|
|
|
TXD Serial Device Int.
|
Serial Port D
|
|
|
|
|
RXD Serial Device Int.
|
|
|
|
|
RTS/TxC RS-232
|
Serial Port C
|
|
|
|
|
CTS/RxC RS-232
|
|
|
|
|
TxB RS-232
|
Serial Port B
|
|
|
|
|
RxB RS-232
|
|
|
|
|
TxA Programming Port
|
Serial Port A
|
|
|
|
|
RxA Programming Port
|
|
|
|
|
OUT0
|
|
|
|
|
OUT1
|
|
|
|
|
OUT2
|
|
|
|
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OUT3
|
|
|
|
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OUT4
|
|
|
|
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OUT5
|
|
|
|
|
OUT6
|
|
|
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OUT7
|
|
|
|
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IN00
|
|
|
|
|
IN01
|
|
|
|
|
OUT8
|
|
|
|
|
OUT9
|
|
|
|
|
IN02
|
|
|
|
|
IN03
|
|
|
|
|
LCD/Keypad Module Reset Line
|
|
|
|
|
LCD/Keypad Module Device Select
|
|
|
|
|
ADC Serial Clock
|
|
|
|
|
ADC Busy
|
|
|
|
|
Not used
|
|
|
|
|
ADC Device Select
|
|
|
|
|
PWM0
|
|
|
|
|
PWM1
|
|
|
|
|
PWM2
|
|
|
|
|
Power Enable Control
|
Low when external power source is connected; high for battery
|
|
|
|
RS-485 Transmit Enable
|
|
|
|
|
RS-232 Shutdown Control
|
|
|
|
|
TxF RS-485
|
Serial Port F
|
|
|
|
|
RxF RS-485
|
|
|
|
|
Relay Set
|
|
|
|
|
Relay Reset
|
|
|
|
|
TxE RS-232
|
Serial Port E
|
|
|
|
|
RxE RS-232
|
|
