Chapter 3 Interrupts

Serial Interface 0 Transmission Interrupt Control Register (SC0TICR)

The serial Interface 0 transmission interrupt control register (SC0TICR) controls interrupt level of serial Iinterface 0 transmission interrupt, interrupt enable flag and interrupt request. Interrupt control register should be operated when the maskable interrupt enable flag (MIE) of PSW is "0".

 

7

6

5

4

3

2

1

0

 

 

SC0TICR

SC0T

SC0T

-

-

-

-

SC0TIE SC0TIR

(At reset : 0 0 - - - - 0 0)

LV1

LV0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SC0TIR

Serial interface 0 transmission

 

 

 

 

 

 

 

 

 

interrupt request flag

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0

No interrupt request

 

 

 

 

 

 

 

 

 

1

Interrupt request generated

SC0TIE

0

1

SC0T SC0T

LV1 LV0

Serial interface 0 transmission interrupt enable flag

Disable interrupt

Enable interrupt

Serial interface 0 transmission interrupt level flag

The CPU has interrupt levels from 0 to 3. These flags set the interrupt level for interrupt requests.

Figure 3-2-19 Serial Interface 0 Transmission Interrupt Control Register

(SC0TICR : x'03FF5', R/W)

Control Registers

III - 31

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Image 125
Panasonic F77G, MN101C77C user manual SC0TIR, SC0TIE SC0T SC0T LV1 LV0