9UMS9001AKLF IDT [Integrated Device Technology], 9UMS9001AKLF Datasheet - Page 13

• Manufacturer Part Number: 9UMS9001AKLF
• Description: PC MAIN CLOCK - CK540
• Manufacturer: IDT [Integrated Device Technology]

IDT
Comments
Power-up w/ TEST_SEL = 1 to enter test mode
Cycle power to disable test mode
TEST_MODE -->low Vth input
TEST_MODE is a real time input
If TEST_SEL HW pin is 0 during power-up,
test mode can be invoked through B9b3.
If test mode is invoked by B9b3, only B9b4
is used to select HI-Z or REF/N
FSLB/TEST_Mode pin is not used.
Cycle power to disable test mode, one shot control
B9b3: 1= ENTER TEST MODE, Default = 0 (NORMAL OPERATION)
B9b4: 1= REF/N, Default = 0 (HI-Z)
Test Clarification Table
9UMS9001
PC MAIN CLOCK - CK540
®
PC MAIN CLOCK - CK540
TEST_SEL
HW PIN
<2.0V
>2.0V
>2.0V
>2.0V
>2.0V
<2.0V
<2.0V
13
HW
TEST_MODE
HW PIN
X
X
X
0
0
1
1
ENTRY BIT
TEST
B9b3
X
X
X
X
0
1
1
Advance Information
SW
REF/N or
B9b4
HI-Z
0
0
1
0
1
0
1
NORMAL
OUTPUT
REF/N
REF/N
REF/N
REF/N
HI-Z
HI-Z
1247B—07/19/10