参数资料
型号: MC68HC05V7FN
厂商: MOTOROLA INC
元件分类: 微控制器/微处理器
英文描述: 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PQCC68
封装: PLASTIC, LCC-68
文件页数: 118/170页
文件大小: 589K
代理商: MC68HC05V7FN
SECTION 5: INTERRUPTS
MOTOROLA
Page 37
MC68HC05V7 Specification Rev. 1.0
and serviced as specified by the contents of $3FFA and $3FFB.The IRQ timing diagram is
shown in Figure 5-4.
Figure 5-4:
External Interrupts Timing Diagram
Either a level-sensitive and edge-sensitive trigger, or an edge-sensitive-only trigger is
available as a mask option for the IRQ pin only.
5.6
16 BIT TIMER INTERRUPT
There are three different timer interrupt flags that cause a timer interrupt whenever they are
set and enabled. The interrupt flags are in the Timer Status Register (TSR), and the enable
bits are in the Timer Control Register (TCR). Any of these interrupts will vector to the same
interrupt service routine, located at the address specified by the contents of memory
location $3FF8 and $3FF9.
5.7
MDLC INTERRUPT
The MDLC Transmit Message Successful and Receive Message Successful interrupts are
respectively generated by the TXMS and RXMS bits of the MDLC Status Register (MSR).
In addition a wake-up from STOP or WAIT mode can also generate an interrupt from the
MDLC. The MDLC Interrupt Enable (IE) bit is located in the MDLC Control Register (MCR).
Provided the IE bit is set (and the CCR I bit is clear), all interrupts will vector to the same
interrupt service routine, located at the address specified by the contents of memory
location $3FF6 and $3FF7.
5.8
SPI INTERRUPT
There are two different SPI interrupt flags that cause an SPI interrupt whenever they are
set and enabled. The interrupt flags are in the SPI Status Register (SPSR), and the enable
bits are in the SPI Control Register (SPCR). Either of these interrupts will vector to the
IRQ
tILIH
tILIL
tILIH
IRQ1 (Port)
IRQn (Port)
IRQ
(MCU)
.
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