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型號(hào)：	R4F2116BG20V
元件分類：	微控制器/微處理器
英文描述：	16-BIT, FLASH, 20 MHz, MICROCONTROLLER, PBGA176
封裝：	13 X 13 MM, 0.80 MM PITCH, PLASTIC, LFBGA-176
文件頁(yè)數(shù)：	40/842頁(yè)
文件大小：	5188K
代理商：	R4F2116BG20V

Section 5 Interrupt Controller

Rev. 1.00 Mar. 02, 2006 Page 94 of 798

REJ09B0255-0100

When the interrupts are requested while IRQ15 to IRQ0 interrupt requests are generated at low

IRQn input, hold the corresponding IRQ input at low level until the interrupt handling

starts. Then put the relevant

IRQ input back to high level within the interrupt handling routine and

clear the IRQnF bit (n

= 15 to 0) in ISR to 0. If the relevant IRQ input is put back to high level

before the interrupt handling starts, the relevant interrupt may not be executed.

The detection of IRQ15 to IRQ0 interrupts does not depend on whether the relevant pin has been

set for input or output. Therefore, when a pin is used as an external interrupt input pin, clear the

DDR bit of the corresponding port to 0 so it is not used as an I/O pin for another function.

A block diagram of interrupts IRQ15 to IRQ0 is shown in figure 5.4.

IRQn interrupt

Clear signal

IRQnSCA, IRQnSCB

Note: Switching between the

IRQ6 and ExIRQ6 pins is controlled by the EIVS bit.

detection circuit

Figure 5.4 Block Diagram of Interrupts IRQ15 to IRQ0

(3) KIN15 to KIN0 Interrupts

Interrupts KIN15 to KIN0 are requested by the input signals on pins

KIN15 to KIN0. Functions of

interrupts KIN15 to KIN0 change as follows according to the setting of the EIVS bit in system

control register 3 (SYSCR3).

H8S/2140B Group compatible vector mode (EIVS = 0 in SYSCR3)

Interrupts KIN15 to KIN8 correspond to interrupt IRQ7, and interrupts KIN7 to KIN0

correspond to interrupt IRQ6. The pin conditions for generating an interrupt request,

whether the interrupt request is enabled, interrupt control level setting, and status of the

interrupt request for the above interrupts are in accordance with the settings and status of

the relevant interrupts IRQ7 and IRQ6.

KIN15 to KIN0 interrupt requests can be masked by using KMIMRA and KMIMR.

If the KIN7 to KIN0 pins are specified to be used as key-sensing interrupt input pins, the

interrupt sensing condition for the corresponding interrupt source (IRQ6 or IRQ7) must be

set to low-level sensing or falling-edge sensing.

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相關(guān)代理商/技術(shù)參數(shù)	參數(shù)描述
R4F2116VBG20V	制造商:Renesas Electronics Corporation 功能描述:MCU 3V 128K,PB-FREE 176-BGA - Trays
R4F2117VBG	制造商:Renesas Electronics Corporation 功能描述:
R4F2117VBG20V	制造商:Renesas Electronics Corporation 功能描述:
R4F2117VLP	制造商:Renesas Electronics Corporation 功能描述:
R4F2117VTE	制造商:Renesas Electronics Corporation 功能描述:MCU, FLASH, 20MHZ, 3.0 TO 3.6V - Trays

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