Sensoray 626 - Manual (Page 3)

Sensoray Model 626 Instruction Manual
Page 1
TABLE OF CONTENTS
1. LIMITED WARRANTY.................................................................................................................................................. 4
2. SPECIAL HANDLING INSTRUCTIONS..................................................................................................................... 4
3. INTRODUCTION ............................................................................................................................................................ 5
4. DEVICE AND VENDOR IDENTIFICATION.............................................................................................................. 5
5. INSTALLATION.............................................................................................................................................................. 5
6. SYSTEM BLOCK DIAGRAM........................................................................................................................................ 6
7. BOARD LAYOUT............................................................................................................................................................ 7
8. INITIAL STATES AFTER RESET................................................................................................................................ 8
8.1 M ISCELLANEOUS R EGISTERS ......................................................................................................................................... 8
8.2 D IGITAL I/O .................................................................................................................................................................... 8
8.3 C OUNTERS ...................................................................................................................................................................... 8
9. DIGITAL I/O .................................................................................................................................................................... 9
9.1 O VERVIEW ...................................................................................................................................................................... 9
9.2 W RITING TO THE D IGITAL O UTPUTS ............................................................................................................................. 10
9.2.1 Digital Outputs 0-6 used as Counter Overflows.................................................................................................. 10
9.3 R EADING THE D IGITAL I NPUTS ...................................................................................................................................... 10
9.4 C APTURE D IGITAL I NPUT E DGES ................................................................................................................................... 11
9.4.1 Selecting Positive or Negative Edge Capture...................................................................................................... 11
9.4.2 Edge
Capture Interrupt ....................................................................................................................................... 11
9.4.3 Enabling and Disabling Edge Capture................................................................................................................ 11
9.5 R EADING E DGE C APTURE S TATUS R EGISTERS .............................................................................................................. 12
9.5.1 Reading which channels have Captured Edges ................................................................................................... 12
9.5.2 Reading the Status of the Interrupt Enable Registers .......................................................................................... 12
9.5.3 Reading the Status of the Edge Selection Register .............................................................................................. 12
9.5.4 Reading the Status of the Capture Enable Register............................................................................................. 13
9.5.5 Clearing
a Captured Edge................................................................................................................................... 13
9.6 D IGITAL I NPUT I NTERRUPTS .......................................................................................................................................... 13
9.6.1 Selecting Interrupt on Edge Capture ................................................................................................................... 13
9.6.2 Digital
Input Interrupt Handling ......................................................................................................................... 13
10. COUNTERS................................................................................................................................................................ 14
10.1 O VERVIEW ................................................................................................................................................................ 14
10.1.1 Latches ............................................................................................................................................................ 14
10.1.2 Clear/Pre-load ................................................................................................................................................ 14
10.1.3 Interrupts......................................................................................................................................................... 15
10.1.4 Overflow Outputs ............................................................................................................................................ 15
10.1.5 Index Inputs..................................................................................................................................................... 15
10.1.6 Counter Inputs................................................................................................................................................. 15
10.1.7 Power failure................................................................................................................................................... 15
10.2 E NCODER CONNECTIONS ........................................................................................................................................... 16
10.3 B LOCK D IAGRAM ...................................................................................................................................................... 17
10.4 C OUNTER S ETUP R EGISTERS ..................................................................................................................................... 18
10.5 S ETTING U P THE C OUNTER S OURCE ......................................................................................................................... 19
10.5.1 Software Control of the Index ......................................................................................................................... 20
10.5.2 Multiplier......................................................................................................................................................... 20
10.5.3
Software Control Of Direction & Count Generation ...................................................................................... 20
10.6 D RIVING C OUNTER B F ROM C OUNTER A’ S O VERFLOW ........................................................................................... 20