MB86606A Datasheet, PDF (21/64 Pages) Fujitsu Component Limited. – FAST-20 SCSI Protocol Controller

MB86606A
4. AC Characteristics
(1) System clock
• SCSI clock (SCLK pin)
Parameter
Clock period
Clock pulse width (Low)
Clock pulse width (High)
Clock pulse rise time
Clock pulse fall time
Symbol
tCLF
tCLCH
tCHCL
tCR
tCF
Min.
25.0
10.0
10.0
—
—
Value
Typ.
—
—
—
—
—
Max.
50.0
—
—
5.0
5.0
Unit
ns
ns
ns
ns
ns
Note: When the internal operating clock frequency is the same as the input clock frequency, (when using the device
in divide-by-1 mode), the clock pulse width for L and H levels must have minimum 20.0 ns or longer.
(i.e. When the clock conversion register value is 0Bh (address: 10h in the initial setting registers) and input
clock frequency = 20 MHz.)
SCLK
t CLCH
2.4 V
0.8 V
t CF
2.4 V
0.8 V
t CLF
t CR
2.4 V
0.8 V
t CHCL
2.4 V
0.8 V
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