Rabbit eDisplay, User Manual

Page: 23 / 172

User’s Manual 17
3. S
UBSYSTEMS
Chapter 3 describes the principal subsystems for the OP7200.
• Digital I/O
• Analog Features (OP7200 only)
• Serial Communication
• Memory
• Liquid Crystal Display Controller
• Keypad
• OP7200 CPLD
Figure 5 shows these Rabbit-based subsystems designed into the OP7200.
Figure 5. OP7200 Subsystems
The memory and microprocessor are located on the RabbitCore module. The RCM2200
module is used on the OP7200. If you have more than one OP7200 or other Rabbit products
built around RabbitCore modules, take care not to swap the RabbitCore modules since they
contain system ID block information and calibration constants that are unique to the board
they were originally installed on. It is a good idea to save the calibration constants should
you need to replace a RabbitCore module in the future. See Section 4.3.8, “Using System
Information from the RabbitCore Module,” for more information.
Ethernet
SRAM
Flash
11 MHz
osc
32 kHz
osc
RabbitCore Module
CPLD
RABBIT
2000
RS-232
RS-485
A/D
Converter
Digital
Input
Digital
Output
Interface to
LCD/Keypad
Touch-
screen
Controller