Cmsemicon CMS32L051 - Chapter 19 Key Interrupt Function; 19.1 Function of key interrupt; 19.2 Structure of key interrupt

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CMS32L051 User Manual |Chapter 19 Key Interrupt Function
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Chapter 19 Key Interrupt Function
The number of channels entered by key interrupt varies by product.
19.1 Function of key interrupt
A key interrupt (INTKR) can be generated by giving the key interrupt input pin (KR0 to KR5) on the falling
edge of the input.
Table 19-1 Assignment of key interrupt detection pins
Key interrupt pin
Key return mode register (KRM)
KR0
KRM0
KR1
KRM1
KR2
KRM2
KR3
KRM3
KR4
KRM4
KR5
KRM5
19.2 Structure of key interrupt
The key interrupt consists of the following hardware.
Table 19-2 Structure of key interrupts
Item
Control registers
Control registers
Key return mode register (KRM) Port mode register (PMx).
Port mode control register (PMCx).