Fujitsu 8FX User Manual

MB95630H Series
MN702-00009-2v0-E FUJITSU SEMICONDUCTOR LIMITED 193
CHAPTER 13 INTERRUPT PIN SELECTION CIRCUIT
13.5 Register
13.5.1 Interrupt Pin Selection Circuit Control Register
(WICR)
This register is used to determine which of the available peripheral input pins
should be output to the interrupt circuit and which interrupt pins they should
serve as.
■ Register Configuration
■ Register Functions
[bit7] Undefined bit
The read value is always "0". Writing a value to this bit has no effect on operation.
[bit6] INT00: INT00 interrupt pin select bit
This bit determines whether to select the INT00 pin as an interrupt input pin.
Writing "0" to this bit deselects the INT00 pin as an interrupt input pin, and the interrupt pin selection circuit
treats the INT00 pin input as being fixed at "0".
Writing "1" to this bit selects the INT00 pin as an interrupt input pin and the circuit passes the INT00 pin
input to INT00 (ch. 0) of the external interrupt circuit. In this case, the input signal to the INT00 pin can
generate an external interrupt if INT00 (ch. 0) operation is enabled in the external interrupt circuit.
[bit5:4] Undefined bits
Their read values are always "0". Writing values to these bits has no effect on operation.
[bit3] EC1: EC1 interrupt pin select bit
This bit determines whether to select the EC1 pin as an interrupt input pin.
Writing "0" to this bit deselects the EC1 pin as an interrupt input pin, and the interrupt pin selection circuit
treats the EC1 pin input as being fixed at "0".
Writing "1" to this bit selects the EC1 pin as an interrupt input pin and the circuit passes the EC1 pin input to
INT00 (ch. 0) of the external interrupt circuit. In this case, the input signal to the EC1 pin can generate an
external interrupt if INT00 (ch. 0) operation is enabled in the external interrupt circuit.
bit 7 6 5 4 3 2 1 0
Field — INT00 — — EC1 UI0 UCK0 TRG1
Attribute — R/W — — R/W R/W R/W R/W
Initial value 0 1 0 0 0 0 0 0
bit6 Details
Writing "0" Deselects the INT00 pin as an interrupt input pin.
Writing "1" Selects the INT00 pin as an interrupt input pin.
bit3 Details
Writing "0" Deselects the EC1 pin as an interrupt input pin.
Writing "1" Selects the EC1 pin as an interrupt input pin.

Fujitsu 8FX Specifications

General

Brand	Fujitsu
Model	8FX
Category	Computer Hardware
Language	English