USER'S GUIDE

INTERRUPT ENABLE CONTROL BITS Figure 11±2

Bit Description:

All bits are read/write at any time and are cleared to 0 following any hardware reset.

IE.7:

EA

ªEnable All Interruptsº:

When set to 1, each interrupt except for PFW may be individually enabled or

 

disabled by setting or clearing the associated IE.x bit. When cleared to 0,

 

interrupts are globally disabled and no pending interrupt request will be ac-

 

knowledged except for PFW.

IE.4:

ES

ªEnable Serial Interruptº:

When set to 1, an interrupt request from either the serial port's TI or RI flags

 

can be acknowledged. Serial I/O interrupts are disabled when cleared to 0.

IE.3:

ET1

ªEnable Timer 1 Interruptº:

When set to 1, an interrupt request from Timer 1's TF1 flag can be acknowl-

 

edged. Interrupts are disabled from this source when cleared to 0.

IE.2:

EX1

ªEnable External

 

Interrupt 1º:

When set to 1, an interrupt from the IE1 flag can be acknowledged. Inter-

 

rupts are disabled from this source when cleared to 0.

IE.1:

ET0

ªEnable Timer 0Interruptº:

When set to 1, an interrupt request from Timer 0's TF0 flag can be acknowl-

 

edged. Interrupts are disabled from this source when cleared to 0.

IE.0:

EX0

ªEnable External

 

Interrupt 0º:

When set to 1, an interrupt request from the IE0 flag can be acknowledged.

 

Interrupts are disabled from this source when cleared to 0.

050396 91/173

92

Page 92
Image 92
Mitsubishi DS907x SIP, DS5000TK manual Interrupt Enable Control Bits ±2 Bit Description, ET0, EX0