Description - Intermec EasyCoder 501 XP Service Manual

Chapter 15
15. CPU Board

15.1 Description

CORE
CPU
Support
Chip
Watchdog
Flash
DRAM
Memory
114
The CPU board is a four-layer board with most of its circuits sur-
face-mounted. On the front side is a combined circuit/GND layer,
inside the laminate are a VCC layer and a circuit layer, and on the
back side is a GND layer.
The hardware contains of the following main functions:
• A processor core.
• Stepper motor drivers.
• Thermal printhead driver.
• Sensor drivers.
• Peripheral units such as UART, Centronics, timers, etc.
• Flash memory SIMM for the fi rmware.
• DRAM SIMM
• Slave processor.
• Expansion bus.
Clock
Reset
&
Slave Processor
A/D Converter
Bar Code Electronic
Wand
Interrupt
Timer
Controller
I/O DATA
TPH Stepper
Logic Driver
I2C-BUS
Electronic
Key/RTC
Electronic
Key Key
Intermec EasyCoder 501 XP & 601 XP – Service Manual
Memory
Uart
Card
Sensors
Expansion
Bus
Optional
Console
Board
Centronics