Keil MCB167-NET, User Manual

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14 Chapter 3. Hardware
standard 5.5mm barrel plug with a 2.5mm center hole. The center hole provides
positive voltage. 5 Volts DC is generated and provided to the board by a 7805
voltage regulator at IC2. To reduce the noise for the A/D converter a second
78L05 voltage regulator is provided at IC6.
C167 CPU
The Infineon C167CR or C167CS provided with the MCB251 are high-end 167
devices with on-chip CAN. The CPU is located at IC1. The IC1 socket can
accommodate a variants of the 167 including ST10-167/168. A 10.000 MHz
crystal provides the clock signal for the CPU.
Configuration
The MCB167-NET is a very flexible evaluation board. You can change the
operation of the board using the DIP switches and the configuration jumpers.
Features such as CAN interfaces, chip select and segment address lines, internal
CPU clock frequency, on-chip ROM usage, and Monitor operation can all be
configured using these switches and jumpers. Refer to “DIP Switches” on page
9 and “Configuration Jumpers” on page 11 for a complete description of the DIP
switches and configuration jumpers.
NOTE
You must RESET the MCB167-NET after changing the state of any DIP switch.
CAN Drivers
The MCB167-NET provides a dual CAN interface with SI9200AY CAN drivers
(IC9 and IC11) and termination resistors (R18 and R19). The settings of this
CAN drivers can be changed with various configuration jumpers.
Memory Devices
The MCB167-NET provides two high-speed RAM devices (IC5, IC8) and
sockets for two Flash ROM devices (IC3, IC4). The chip select signals are
directly provided by the C167 CPU: CS0/ is used for the Flash ROM; and CS1/
is the signal for the RAM.