
III PERIPHERAL BLOCK: 8-BIT PROGRAMMABLE TIMERS
B-III-3-16
EPSON
S1C33210 FUNCTION PART
F8TUx is the interrupt factor flag corresponding to each timer. It is set to "1" when the counter underflows.
At this time, if the following conditions are met, an interrupt to the CPU is generated:
1. The corresponding interrupt enable register bit is set to "1".
2. No other interrupt request of a higher priority has been generated.
3. The IE bit of the PSR is set to "1" (interrupts enabled).
4. The value set in the corresponding interrupt priority register is higher than the interrupt level (IL) of the CPU.
When using the interrupt factor of the 8-bit programmable timer to request IDMA, note that even when the above
conditions are met, no interrupt request to the CPU is generated for the interrupt factor that has occurred. If
interrupts are enabled at the setting of IDMA, an interrupt is generated under the above conditions after the data
transfer by IDMA is completed.
The interrupt factor flag is set to "1" whenever interrupt generation conditions are met, regardless of how the
interrupt enable and interrupt priority registers are set.
If the next interrupt is to be accepted after an interrupt has occurred, it is necessary that the interrupt factor flag be
reset, and that the PSR be set again (by setting the IE bit to "1" after setting the IL to a value lower than the level
indicated by the interrupt priority register, or by executing the reti instruction).
The interrupt factor flag can be reset only by writing to it in the software. Note that if the PSR is set again to accept
interrupts generated (or if the reti instruction is executed) without resetting the interrupt factor flag, the same
interrupt occurs again. Note also that the value to be written to reset the flag is "1" when the reset-only method
(RSTONLY = "1") is used, and "0" when the read/write method (RSTONLY = "0") is used.
At initial reset, the content of F8TUx becomes indeterminate, so be sure to reset it in the software.
R8TU0:
Timer 0 IDMA request (D2) / 16-bit timer 5, 8-bit timer, serial I/F Ch.0 IDMA request register (0x40292)
R8TU1:
Timer 1 IDMA request (D3) / 16-bit timer 5, 8-bit timer, serial I/F Ch.0 IDMA request register (0x40292)
R8TU2:
Timer 2 IDMA request (D4) / 16-bit timer 5, 8-bit timer, serial I/F Ch.0 IDMA request register (0x40292)
R8TU3:
Timer 3 IDMA request (D5) / 16-bit timer 5, 8-bit timer, serial I/F Ch.0 IDMA request register (0x40292)
Specifies whether IDMA is to be invoked at the occurrence of an interrupt factor.
When using the set-only method (default)
Write "1": IDMA request
Write "0": Not changed
Read: Valid
When using the read/write method
Write "1": IDMA request
Write "0": Interrupt request
Read: Valid
R8TUx is the IDMA request bit for each timer. If this bit is set to "1", IDMA can be invoked when an interrupt factor
occurs, and thus programmed data transfers are performed. If the bit is set to "0", normal interrupt processing is
performed and IDMA is not invoked.
For details on IDMA, refer to "IDMA (Intelligent DMA)".
At initial reset, R8TUx is set to "0" (interrupt request).
Summary of Contents for S1C33210
Page 4: ......
Page 13: ...S1C33210 PRODUCT PART ...
Page 14: ......
Page 124: ...APPENDIX B PIN CHARACTERISTICS A 110 EPSON S1C33210 PRODUCT PART THIS PAGE IS BLANK ...
Page 125: ...S1C33210 FUNCTION PART ...
Page 126: ......
Page 127: ...S1C33210 FUNCTION PART I OUTLINE ...
Page 128: ......
Page 130: ...I OUTLINE INTRODUCTION B I 1 2 EPSON S1C33210 FUNCTION PART THIS PAGE IS BLANK ...
Page 138: ...I OUTLINE LIST OF PINS B I 3 6 EPSON S1C33210 FUNCTION PART THIS PAGE IS BLANK ...
Page 139: ...S1C33210 FUNCTION PART II CORE BLOCK ...
Page 140: ......
Page 142: ...II CORE BLOCK INTRODUCTION B II 1 2 EPSON S1C33210 FUNCTION PART THIS PAGE IS BLANK ...
Page 148: ...II CORE BLOCK CPU AND OPERATING MODE B II 2 6 EPSON S1C33210 FUNCTION PART THIS PAGE IS BLANK ...
Page 152: ...II CORE BLOCK INITIAL RESET B II 3 4 EPSON S1C33210 FUNCTION PART THIS PAGE IS BLANK ...
Page 234: ...II CORE BLOCK CLG Clock Generator B II 6 10 EPSON S1C33210 FUNCTION PART THIS PAGE IS BLANK ...
Page 236: ...II CORE BLOCK DBG Debug Unit B II 7 2 EPSON S1C33210 FUNCTION PART THIS PAGE IS BLANK ...
Page 237: ...S1C33210 FUNCTION PART III PERIPHERAL BLOCK ...
Page 238: ......
Page 240: ...III PERIPHERAL BLOCK INTRODUCTION B III 1 2 EPSON S1C33210 FUNCTION PART THIS PAGE IS BLANK ...
Page 296: ...III PERIPHERAL BLOCK WATCHDOG TIMER B III 5 4 EPSON S1C33210 FUNCTION PART THIS PAGE IS BLANK ...
Page 429: ...S1C33210 FUNCTION PART IV ANALOG BLOCK ...
Page 430: ......
Page 432: ...IV ANALOG BLOCK INTRODUCTION B IV 1 2 EPSON S1C33210 FUNCTION PART THIS PAGE IS BLANK ...
Page 448: ...IV ANALOG BLOCK A D CONVERTER B IV 2 16 EPSON S1C33210 FUNCTION PART THIS PAGE IS BLANK ...
Page 449: ...S1C33210 FUNCTION PART V DMA BLOCK ...
Page 450: ......
Page 452: ...V DMA BLOCK INTRODUCTION B V 1 2 EPSON S1C33210 FUNCTION PART THIS PAGE IS BLANK ...
Page 506: ...V DMA BLOCK IDMA Intelligent DMA B V 3 18 EPSON S1C33210 FUNCTION PART THIS PAGE IS BLANK ...
Page 507: ...S1C33210 FUNCTION PART Appendix I O MAP ...
Page 508: ......
Page 557: ......