TNETX15VE datasheet(89/113 Pages) TI1

номер детали	TNETX15VE

подробное описание детали	VLAN-ENGINE ADDRESS-LOOKUP DEVICE

PDF	113 Pages

Scroll/Zoom	100%

производитель	TI1 [Texas Instruments]

домашняя страница	http://www.ti.com

Logo

89 / 113 page

TNETX15VE

VLAN-ENGINE ADDRESS-LOOKUP DEVICE

SPWS028B – APRIL 1997 – REVISED SEPTEMBER 1997

POST OFFICE BOX 655303

• DALLAS, TEXAS 75265

PRINCIPLES OF OPERATION

masking interrupts

The programmer may be interested in processing some interrupts now, while leaving the others for a later time.

The TNETX15VE can mask interrupts. This is accomplished by an interrupt masking register, (intmask). The

int and intmask registers have a one-to-one correspondence. The only way EINT is asserted is if both int and

intmask are in a 1 state. The logic for the interrupt masking is shown in Figure 17.

Int

Intmask

AND

EINT

Interrupt Mask Register

Interrupt Register

Figure 17. Interrupt Masking Logic

test interrupts (INT)

Test interrupts are generated by asserting the INT bit in the int register. The INT bit in the intmask register must

also be set to a 1 state for the interrupt to take effect. The INT bit is used to give the programmer an easy way

to test interrupt detection. This bit is the only bit in the int register that is writeable.

TNETX15VE датащи(PDF) 89 Page - Texas Instruments