I/O PORTS

S3C84E5/C84E9/P84E9

 

 

Port 4 Interrupt Pending Register (P4INTPND)

F3H, Set1, Bank0, R/W, Reset value="00"

MSB

.7

.6

.5

.4

.3

.2

.1

.0

LSB

[.7-.3] Not used (must keep always 0)

[.2] P4.2/PND10, Interrupt Pending Bit

0 = No interrupt pending (when read) / Pending bit clear (when write) 1 = Interrupt is pending (when read) / No effect (when write)

[.1] P4.1/PND9, Interrupt Pending Bit

0 = No interrupt pending (when read) / Pending bit clear (when write) 1 = Interrupt is pending (when read) / No effect (when write)

[.0] P4.0/PND8, Interrupt Pending Bit

0 = No interrupt pending (when read) / Pending bit clear (when write) 1 = Interrupt is pending (when read) / No effect (when write)

Figure 9-13. Port 4 Interrupt Pending Register (P4INTPND)

Port 4 Interrupt Control Register (P4INT)

F2H, Set1, Bank0, R/W, Reset value="00"

MSB

.7

.6

.5

.4

.3

.2

.1

.0

 

 

 

 

 

 

 

 

 

[.7-.3] Not used (must keep always 0)

[.2] P4.2 External Interrupt (INT10) Enable Bit

0 = Disable interrupt

1 = Enable interrupt

[.1] P4.1 External Interrupt (INT9) Enable Bit

0 = Disable interrupt

1 = Enable interrupt

[.0] P4.0 External Interrupt (INT8) Enable Bit

0 = Disable interrupt

1 = Enable interrupt

LSB

Figure 9-14. Port 4 Interrupt Control Register (P4INT)

9-16

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Samsung S3C84E5 P4.2/PND10, Interrupt Pending Bit, P4.1/PND9, Interrupt Pending Bit, P4.0/PND8, Interrupt Pending Bit