HD6412321 datasheet(21/1302 Pages) RENESAS

21 / 1302 page

Rev.6.00 Sep. 27, 2007 Page xxi of xxx

REJ09B0220-0600

12.2.5 Timer Control/Status Registers 0 and 1 (TCSR0, TCSR1).................................. 563

12.2.6 Module Stop Control Register (MSTPCR) .......................................................... 566

12.3

Operation........................................................................................................................... 567

12.3.1 TCNT Incrementation Timing ............................................................................. 567

12.3.2 Compare Match Timing ....................................................................................... 568

12.3.3 Timing of TCNT External Reset.......................................................................... 570

12.3.4 Timing of Overflow Flag (OVF) Setting ............................................................. 570

12.3.5 Operation with Cascaded Connection .................................................................. 571

12.4

Interrupts ........................................................................................................................... 572

12.4.1 Interrupt Sources and DTC Activation ................................................................ 572

12.4.2 A/D Converter Activation .................................................................................... 572

12.5

Sample Application........................................................................................................... 573

12.6

Usage Notes ...................................................................................................................... 574

12.6.1 Contention between TCNT Write and Clear........................................................ 574

12.6.2 Contention between TCNT Write and Increment ................................................ 575

12.6.3 Contention between TCOR Write and Compare Match ...................................... 576

12.6.4 Contention between Compare Matches A and B ................................................. 577

12.6.5 Switching of Internal Clocks and TCNT Operation............................................. 577

12.6.6 Interrupts and Module Stop Mode ....................................................................... 579

Section 13 Watchdog Timer ..............................................................................581

13.1

Overview........................................................................................................................... 581

13.1.1 Features ................................................................................................................ 581

13.1.2 Block Diagram ..................................................................................................... 582

13.1.3 Pin Configuration................................................................................................. 583

13.1.4 Register Configuration......................................................................................... 583

13.2

Register Descriptions ........................................................................................................ 584

13.2.1 Timer Counter (TCNT)........................................................................................ 584

13.2.2 Timer Control/Status Register (TCSR) ................................................................ 585

13.2.3 Reset Control/Status Register (RSTCSR) ............................................................ 587

13.2.4 Notes on Register Access..................................................................................... 588

13.3

Operation........................................................................................................................... 589

13.3.1 Operation in Watchdog Timer Mode ................................................................... 589

13.3.2 Operation in Interval Timer Mode ....................................................................... 591

13.3.3 Timing of Overflow Flag (OVF) Setting ............................................................. 592

13.3.4 Timing of Watchdog Timer Overflow Flag (WOVF) Setting.............................. 593

13.4

Interrupts ........................................................................................................................... 594

13.5

Usage Notes ...................................................................................................................... 594

13.5.1 Contention between Timer Counter (TCNT) Write and Increment ..................... 594

13.5.2 Changing Value of CKS2 to CKS0...................................................................... 595

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