Nec Network Controller uPD98502 Instrukcja Użytkownika Pobierz pdf (Strona 223)

100

101

CHAPTER 3 SYSTEM CONTROLLER

Preliminary User’s Manual S15543EJ1V0UM

223

3.5.4 ITCNTR (IBUS Timeout Timer Control Register)

The IBUS Timeout Timer control register “ITCNTR” is a read-write and word-aligned 32-bit register. ITCNTR is

used to enable use of the IBUS Timeout Timer. ITCNTR is initialized to 0H at reset and contains the following field:

Bits Field R/W Default Description

31:1 Reserved R/W 0 Hardwired to 0.

0 ITWEN R/W 0 IBUS Timeout Timer enable

1 = Enable

0 = Disable

3.5.5 ITSETR (IBUS Timeout Timer Set Register)

This register sets the cycle for Deadman’s Switch functions. The Deadman’s Switch cycle can be set in 1-clock

increments in a range from 1 to 232–1 clock. The DSUCLRR’s DSWCLR bit must be set by means of software within

the specified cycle time. ITSETR is a 32-bit word-aligned register. Default is 8000_0000H.

Bits Field R/W Default Description

31:0 ITTIME R/W 8000_

0000H

IBUS Timeout value setting

Timeout = ITTIME value system clock period (100 MHz:10 ns, 66 MHz:15 ns)

example:

ITTIME = 05F5_E100H (100 MHz) or 03F9_40AAH (66 MHz)

-> Timeout = 1 sec

ITTIME = 0BEB_C200H (100 MHz) or 07F2_8154H (66 MHz)

-> Timeout = 2 sec

ITTIME = 11E1_A300H (100 MHz) or 0BEB_C200H (66 MHz)

-> Timeout = 3 sec

: : :

1 2 ... 218 219 220 221 222 223 224 225 226 227 228 ... 594 595

Komentarze do niniejszej Instrukcji

Brak uwag

Nec Network Controller uPD98502 Instrukcja Użytkownika Strona 223

Komentarze do niniejszej Instrukcji

Powiązane produkty i podręczniki dla Sprzęt komputerowy Nec Network Controller uPD98502