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參數(shù)資料

型號(hào)：	HD404816
廠商：	Hitachi,Ltd.
英文描述：	4-Bit Single-Chip Microcomputer(4位單片微計(jì)算機(jī))
中文描述：	4位單片機(jī)（4位單片微計(jì)算機(jī)）
文件頁(yè)數(shù)：	19/98頁(yè)
文件大?。?/td>	621K
代理商：	HD404816

HD404818 Series

Interrupts

Six interrupt sources are available on the MCU: external requests (

INT

), timer/counters (timers A,

B, and C), and the serial interface. For each source, an interrupt request flag (IF), interrupt mask (IM), and

interrupt vector addresses are provided to control and maintain the interrupt request. The interrupt enable

flag (IE) is also used to control interrupt operations.

Interrupt Control Bits and Interrupt Servicing:

The interrupt control bits are mapped on $000 through

$003 by the RAM space. They are accessible by RAM bit manipulations instructions, although the interrupt

request flag (IF) cannot be set by software. The interrupt enable flag (IE) and IF are cleared to 0, and the

interrupt mask (IM) is set to 1 after MCU reset.

Figure 6 is a block diagram of the interrupt control circuit. Table 2 shows the interrupt priority and vector

addresses, and table 3 shows the interrupt conditions corresponding to each interrupt source.

The interrupt request is generated when IF is set to 1 and IM is 0. If IE is 1 at this time, the interrupt will be

activated and vector addresses will be generated from the priority PLA corresponding to the interrupt

sources.

相關(guān)代理商/技術(shù)參數(shù)	參數(shù)描述
HD404816FS	制造商:RENESAS 制造商全稱(chēng):Renesas Technology Corp 功能描述:4-Bit Single-Chip Microcomputer
HD404816H	制造商:RENESAS 制造商全稱(chēng):Renesas Technology Corp 功能描述:4-Bit Single-Chip Microcomputer
HD404816TF	制造商:RENESAS 制造商全稱(chēng):Renesas Technology Corp 功能描述:4-Bit Single-Chip Microcomputer
HD404818	制造商:RENESAS 制造商全稱(chēng):Renesas Technology Corp 功能描述:4-Bit Single-Chip Microcomputer
HD404818FS	制造商:HITACHI 制造商全稱(chēng):Hitachi Semiconductor 功能描述:16-digit LCD driver

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