Description - Intermec EasyCoder PF2i Service Manual

Chapter 13—CPU Board

13.1 Description

Network
card
6
PCI bus
UART
(custom)
CPU
RISC core
Memory controller
PCI interface
Bus isolation
2
Compact Flash
Flash memory
142
The CPU board is a four-layer board with most of its circuits surface-
mounted. Inside the laminate are a combined VCC layer (5V/3.3V/2.5V)
and a GND layer. The front and back sides are signal routing layers.
The hardware contains of the following main functions:
• Processor core
• Thermal printhead driver
• Stepper motor control logic
• Sensor drivers
• Communication, such as UART, USB, etc.
• Flash memory SIMM for the fi rmware and non-volatile storage
• SDRAM SIMM for working memory
• A/D converter for sensor adjustment, etc.
• Compact Flash memory card expansion
• Expansion bus
• PCI bus (custom)
8
1
1
SDRAM
1
Clock
48 MHz
2
2
CLIC
Support logic
Board id
Reset
1-971630-25 CPU board; Block Diagram
(numbers refer to schematics in Chapter 13.7)
Intermec EasyCoder PF2i, PF4i, and PF4i Compact Industrial—Service Manual
5
Wand iButton
PSA
TPH logic
Stepper logic
Interrupt
2
I C master
5
2
I C bus
CPU board
EEPROM
6
2
Exp. interface
Optional board
(Optional board)
(only one optional
board in PF-series)
3 5
Beeper
3
Sensors
A/D converter
Console
Finisher
PSU/Motor
6
USB
Stepper control signals
Power conversion
5V
3.3V
2.5V
5
3
4
TPH
5
5
5
interface
7
24V In