Hitachi H8S/2215 Series, Hardware Manual

Page: 36 / 745

Rev. 3.0, 10/02, page xxxvi of lviii
10.7.1 Input/Output Timing ............................................................................................313
10.7.2 Interrupt Signal Timing ........................................................................................316
10.8 Usage Notes.......................................................................................................................320
Section 11 8-Bit Timers (TMR).........................................................................327
11.1 Features .............................................................................................................................327
11.2 Input/Output Pins ..............................................................................................................329
11.3 Register Descriptions ........................................................................................................329
11.3.1 Timer Counters (TCNT).......................................................................................329
11.3.2 Time Constant Registers A (TCORA) .................................................................329
11.3.3 Time Constant Registers B (TCORB) ..................................................................329
11.3.4 Time Control Registers (TCR) .............................................................................329
11.3.5 Timer Control/Status Registers (TCSR)...............................................................332
11.4 Operation...........................................................................................................................334
11.4.1 Pulse Output .........................................................................................................334
11.5 Operation Timing ..............................................................................................................335
11.5.1 TCNT Incrementation Timing..............................................................................335
11.5.2 Setting of Compare Match Flags CMFA and CMFB...........................................336
11.5.3 Timer Output Timing ...........................................................................................336
11.5.4 Timing of Compare Match Clear .........................................................................336
11.5.5 Timing of TCNT External Reset ..........................................................................337
11.5.6 Timing of Overflow Flag (OVF) Setting..............................................................338
11.6 Operation with Cascaded Connection ...............................................................................339
11.6.1 16-Bit Counter Mode ...........................................................................................339
11.6.2 Compare Match Count Mode ...............................................................................339
11.7 Interrupts ...........................................................................................................................340
11.7.1 Interrupt Sources and DTC Activation.................................................................340
11.7.2 A/D Converter Activation ....................................................................................340
11.8 Usage Notes.......................................................................................................................341
11.8.1 Contention between TCNT Write and Clear ........................................................341
11.8.2 Contention between TCNT Write and Increment.................................................342
11.8.3 Contention between TCOR Write and Compare Match.......................................343
11.8.4 Contention between Compare Matches A and B..................................................344
11.8.5 Switching of Internal Clocks and TCNT Operation .............................................344
11.8.6 Mode Setting with Cascaded Connection
.............................................................346
Section 12 Watchdog Timer ..............................................................................347
12.1 Features .............................................................................................................................347
12.2 Register Descriptions ........................................................................................................348
12.2.1 Timer Counter (TCNT) ........................................................................................348
12.2.2 Timer Control/Status Register (TCSR) ................................................................348
12.2.3 Reset Control/Status Register (RSTCSR) ............................................................350
12.3 Operation...........................................................................................................................351