em6521 EM Microelectronic, em6521 Datasheet - Page 43

• Manufacturer Part Number: em6521
• Description: Mfp Version Of Em6621 Ultra Low Power Microcontroller With 4x20 Lcd Driver
• Manufacturer: EM Microelectronic

Any interrupt request sent by a periphery cell while the corresponding mask is not set will not be stored in the
interrupt request register. All interrupt requests are stored in their IRQxx registers depending only on their
mask setting and not on the general interrupt enable status.
Whenever the EM6521 goes into halt mode the IntEn bit is automatically set to 1, thus allowing to resume from
halt mode with an interrupt.
10.1 Interrupt Control Registers
Table 10.1.6 Register RegIRQ1
Table 10.1.7 Register RegIRQ2
Table 10.1.8 Register RegIRQ3
Table 10.1.9 Register RegIRQMask1
Table 10.1.10 Register RegIRQMask2
Table 10.1.11 Register RegIRQMask3
Copyright © 2005, EM Microelectronic-Marin SA
Bit
Bit
Bit
3
2
1
0
3
2
1
0
3
2
1
0
Bit
Bit
Bit
3
2
1
0
3
2
1
0
3
2
1
0
*; Writing of 1 clears the corresponding bit.
*; Writing of 1 clears the corresponding bit.
*; Writing of 1 clears the corresponding bit.
Interrupt is not stored if the mask bit is 0.
Interrupt is not stored if the mask bit is 0.
Interrupt is not stored if the mask bit is 0
R
MaskIRQCntComp
MaskIRQHz32/8
MaskIRQCount0
MaskIRQSerial
MaskIRQPA[3]
MaskIRQPA[2]
MaskIRQPA[1]
MaskIRQPA[0]
MaskIRQBlink
MaskIRQMSC
MaskIRQHz1
MaskIRQBz
IRQCntComp
IRQCount0
IRQHz32/8
IRQSerial
IRQPA[3]
IRQPA[2]
IRQPA[1]
IRQPA[0]
IRQBlink
IRQMSC
Name
Name
Name
IRQHz1
IRQBz
Name
Name
Name
Reset
Reset
Reset
Reset
Reset
Reset
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R *
R *
R *
R *
R *
R *
R *
R *
R *
R *
R *
R *
43
Millisecond counter int. request
Melody timer interrupt request
Port A PA[3] interrupt request
Port A PA[2] interrupt request
Port A PA[1] interrupt request
Port A PA[0] interrupt request
Millisecond counter int. mask
Melody timer interrupt mask
Port A PA[3] interrupt mask
Port A PA[2] interrupt mask
Port A PA[1] interrupt mask
Port A PA[0] interrupt mask
Prescaler interrupt request
Prescaler interrupt request
Prescaler interrupt request
Counter interrupt request
Counter interrupt request
Prescaler interrupt mask
Prescaler interrupt mask
Prescaler interrupt mask
Serial interrupt request
Counter interrupt mask
Counter interrupt mask
Serial interrupt mask
Description
Description
Description
Description
Description
Description
www.emmicroelectronic.com
EM6521