TMP89FS60 datasheet(6/410 Pages) TOSHIBA

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3. Interrupt Control Circuit

3.1 Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

3.2 Interrupt Latches (IL27 to IL3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

3.3 Interrupt Enable Register (EIR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

3.3.1 Interrupt master enable flag (IMF) .......................................................................................................... 51

3.3.2 Individual interrupt enable flags (EF27 to EF4) ...................................................................................... 51

3.4 Maskable Interrupt Priority Change Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

3.5 Interrupt Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

3.5.1 Initial Setting ........................................................................................................................................... 56

3.5.2 Interrupt acceptance processing............................................................................................................. 56

3.5.3 Saving/restoring general-purpose registers............................................................................................ 57

3.5.3.1 Using PUSH and POP instructions

3.5.3.2 Using data transfer instructions

3.5.3.3 Using a register bank to save/restore general-purpose registers

3.5.4 Interrupt return ........................................................................................................................................ 59

3.6 Software Interrupt (INTSW) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

3.6.1 Address error detection .......................................................................................................................... 60

3.6.2 Debugging .............................................................................................................................................. 60

3.7 Undefined Instruction Interrupt (INTUNDEF). . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

3.8 Revision History. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

4. External Interrupt control circuit

4.1 Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

4.2 Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

4.3 Function. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

4.3.1 Low power consumption function ........................................................................................................... 67

4.3.2 External interrupt 0 ................................................................................................................................. 68

4.3.3 External interrupts 1/2/3.......................................................................................................................... 68

4.3.3.1 Interrupt request signal generating condition detection function

4.3.3.2 A noise canceller pass signal monitoring function when interrupt request signals are generated

4.3.3.3 Noise cancel time selection function

4.3.4 External interrupt 4 ................................................................................................................................. 69

4.3.4.1 Interrupt request signal generating condition detection function

4.3.4.2 A noise canceller pass signal monitoring function when interrupt request signals are generated

4.3.4.3 Noise cancel time selection function

4.3.5 External interrupt 5 ................................................................................................................................. 71

5. Watchdog Timer (WDT)

5.1 Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

5.2 Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

5.3 Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

5.3.1 Setting of enabling/disabling the watchdog timer operation ................................................................... 75

5.3.2 Setting the clear time of the 8-bit up counter .......................................................................................... 76

5.3.3 Setting the overflow time of the 8-bit up counter .................................................................................... 76

5.3.4 Setting an overflow detection signal of the 8-bit up counter ................................................................... 77

5.3.5 Writing the watchdog timer control codes............................................................................................... 77

5.3.6 Reading the 8-bit up counter .................................................................................................................. 78

5.3.7 Reading the watchdog timer status ........................................................................................................ 78

6. Power-on Reset Circuit

6.1 Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79

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