Intel 80960HA, 80960HD, 80960HT manual Once Mode, Reset Once

56

Datasheet

			CLKIN may neither float nor remain idle.
			It must continue to run.
CLKIN		∼
	∼			∼
VCC, VCC5		∼	∼	∼
	∼
ADS, BE3:0, A31:2,
D31:0, LOCK, WAIT,
BLAST,W/R, D/C, DEN,		∼
DT/R, HOLDA,
BLAST, FAIL, SUP,BREQ,	∼	∼
CT3:0, BSTALL, DP3:0,
PCHK		ONCE mode is entered within 1 CLKIN
		period after ONCE becomes low while
		RESET is low.
RESET				∼
	∼	∼	∼
	∼	∼		∼
ONCE
			∼	∼

CLKIN and VCC Stable and RESET low and ONCE low to

RESET high, minimum 10,000 CLKIN Periods.

NOTES:

1.ONCE mode may be entered prior to the rising edge of RESET: ONCE input is not latched until the rising edge of RESET.

2.The ONCE input may be removed after the processor enters ONCE mode.

Figure 31. Entering	80960HA/HD/HT
ONCE Mode