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ST2204 bảng dữ liệu(PDF) 7 Page - Sitronix Technology Co., Ltd. |
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ST2204 bảng dữ liệu(HTML) 7 Page - Sitronix Technology Co., Ltd. |
7 / 24 page ST2204 Ver 0.6 7/24 2008/11/10 6 6.. IIN NT TE ER RR RU UP PT T C CO ON NT TR RO OL LL LE ER R The ST2204 supports 11 hardware internal/external interrupts as well as one software interrupt Brk. There are 12 exception vectors for these interrupts and another one for reset. All interrupts are controlled by interrupt disable flag “I” (bit2 of status register P), and initiate if “I” equals “0”. Hardware interrupts are further controlled by interrupt enable register IENA . Setting bits of IENA enables respective interrupts. The interrupt controller owns one priority arbitrator. When more than one interrupts happen at the same time, the one with lower priority number will be executed first. Refer to TABLE 6-1 for priorities of interrupts. Once an interrupt event was enabled and then happens, the CPU wakes up (if in either wait mode), and associated bit of interrupt request register (IREQ) will be set. If “I” flag is cleared, the related vector will be fetched and then the interrupt service routine (ISR) will be executed. Interrupt request flag can be cleared by two methods. One is to write “0” to IREQ, the other is to initiate related interrupt service routine. Hardware will automatically clear the Interrupt request flag. All interrupt vectors are listed in TABLE 6-1. TABLE 6-1 Interrupt Vectors Name Signal Source Vector Address Priority Description BRK Internal $7FFF,$7FFE 1 Software BRK operation vector RESET External $7FFD,$7FFC 0 Reset vector - - $7FFB,$7FFA - Reserved INTX External $7FF9,$7FF8 6 PC0 edge interrupt DAC Internal $7FF7,$7FF6 7 Reload DAC data interrupt T0 Internal/External $7FF5,$7FF4 8 Timer0 interrupt T1 Internal/External $7FF3,$7FF2 9 Timer1 interrupt PT External $7FF1,$7FF0 10 Port-A transition interrupt BT Internal $7FEF,$7FEE 11 Base Timer interrupt LCD Internal $7FED,$7FEC 12 LCD Frame interrupt - - $7FEB,$7FEA - Reserved STX External $7FE9,$7FE8 2 SPI transmit buffer empty interrupt SRX External $7FE7,$7FE6 3 SPI receive buffer ready interrupt UTX External $7FE5,$7FE4 4 UART receiver interrupt URX External $7FE3,$7FE2 5 UART transmitter interrupt |
Số phần tương tự - ST2204 |
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Mô tả tương tự - ST2204 |
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