User`s manual

UPS25 5 RTD Embedded Technologies, Inc
TABLE OF CONTENTS
CHAPTER 1 - INTRODUCTION ............................................................................... 8
Features ........................................................................................................................................................................ 8
Some of the key features of the UPS25 include: ................................................................................................... 8
Power supply unit ........................................................................................................................................................ 9
Charger unit ................................................................................................................................................................ 9
Host interface and control .......................................................................................................................................... 9
Mechanical description ............................................................................................................................................... 9
Connector description ................................................................................................................................................. 9
What comes with your board ................................................................................................................................... 10
When you need help .................................................................................................................................................. 11
CHAPTER 2 - BOARD SETTINGS ......................................................................... 12
Factory-Configured Jumper Settings ...................................................................................................................... 13
Charger control (Factory setting: C/2, top off charge enabled) ....................................................................... 17
CHAPTER 3 - BOARD INSTALLATION ................................................................. 18
Board installation ...................................................................................................................................................... 18
General installation guidelines: ........................................................................................................................... 18
Installation integrated with a PC/104 module stack: ........................................................................................... 18
External power connections ..................................................................................................................................... 20
CHAPTER 4 - HARDWARE DESCRIPTION .......................................................... 22
Current Limit ....................................................................................................................................................... 23
Charger power converter ......................................................................................................................................... 23
Ni-Mh/Ni-CD Battery Pack and Thermistor ....................................................................................................... 24
Ni-Mh\Ni-Cd battery charger .............................................................................................................................. 25
Discharging Ni-Mh/Ni-Cd battery pack .............................................................................................................. 25
Charger mode configuration- solder blobs B2 and B3 ........................................................................................... 26
Power switching circuitry ......................................................................................................................................... 28
CHAPTER 5 - BOARD OPERATION AND PROGRAMMING ................................ 31
Defining the Memory Map ....................................................................................................................................... 31
BA+0 Control register (Read and Write) ......................................................................................................... 31
BA+1 Status register (Read) ........................................................................................................................... 32
BA+1 Status register (Write) .......................................................................................................................... 32
Programming the UPS25 .......................................................................................................................................... 32
Clearing and setting bits in an I/O port................................................................................................................... 33
INTERRUPTS ........................................................................................................................................................... 33
What is an interrupt? ........................................................................................................................................... 33
Interrupt request lines .......................................................................................................................................... 34
8259 Programmable Interrupt Controller ............................................................................................................ 34
Interrupt Mask Register (IMR) ............................................................................................................................ 34
End-of-Interrupt (EOI) Command ....................................................................................................................... 34
What exactly happens when an interrupt occurs? ................................................................................................ 35