evm629axf Semtech Corporation, evm629axf Datasheet - Page 7

• Manufacturer Part Number: evm629axf
• Description: Timing Deskew Quad Fanout Element
• Manufacturer: Semtech Corporation

Programming
The Edge629 is programmed serially with 3 control lines:
which are all synchronous with CK. With CS valid (high),
rising edge of CK will load SDI into the 16 bit shift register.
With CS valid and UPDATE valid (high), CK high will make
the selected latch go transparent. The falling edge of CK
will then latch the data (see Figures 6 and 7).
Data and address information are combined in the 16 bit
word. Bits 0–6 are used for data, bits 11–15 for address.
Bits 11–14 select 1 of 16 destinations, bit 15, if high,
selects all 16 locations to be loaded simultaneously (use-
ful for preloading all registers to a default state).
TEST AND MEASUREMENT PRODUCTS
Circuit Description (continued)
2005 Semtech Corp. Rev. 3, 8/1/05
SDI
CS
UPDATE
–
–
–
serial data input
chip select
register update
Figure 5. Voltage vs. Temperature for Thermal Diode String
4.20
4.00
3.80
3.60
3.40
3.20
3.00
2.80
2.60
2.40
2.20
0.00
V = V anode – V cathode ; V cathode = VEE
50.0
Temp (˚C)
100
7
A
B
d
0
1
2
3
4
5
6
7
8
9
A
B
C
D
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: I FORCE = 100 /Anode
: I FORCE = 10 /Anode
: I FORCE = 1 /Anode
3
2
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D
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N
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Edge629
, s
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www.semtech.com
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