Datasheet

1.3 Physical Requirements, Electrical Requirements
C141-C008 1-23
This signal is asserted when;
a) detecting of the Loop Port Bypass primitive sequence
b) being removed of the drive from the loop
c) loss of receive clock
d) loss of transmission clock
e) detecting hardware error within the drive
This signal is negated when the drive detects a Loop Port Enable primitive
sequence.
(11) –Drive present ; This signal connected to the ground.
1.3.3 Signal function in SFF8067 mode
(1) –Parallel ESI
–Parallel ESI signal is used to request the enclosure to provide the SEL_x (x = 0-
6) addressing signals and to request ESI block Read/Write operation.
Table 1.13 defines electronic characteristics of this signal.
Table 1.17 Output characteristics of –parallel ESI
State Current Drive Available Output Voltage
high
–100 µA <IOH < 100 µA
0< VOH <5.25V
low IOL >1.6 mA 0< VOL <0.5V
Table 1.17 shows how –Parallel ESI signal is used in the Enclosure Service
Interface.
(2) –DSK_WR, DSK_RD, ENCL_ACK, D(3), D(2), D(1), D(0)
The SEL_x (x = 0-6) signals change into communication control signals when
–Parallel ESI signal is asserted.