stc3800 Connor-Winfield VCXOs, stc3800 Datasheet - Page 12

• Manufacturer Part Number: stc3800
• Description: Integrated - Stratum 3e Timing Source
• Manufacturer: Connor-Winfield VCXOs

Detailed Description continued
Register Control
selects parallel bus access, and Bmode=0 selects SPI. Parallel bus and SPI data I/O operations are shown as follows.
Symbol
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
CR
CSMIN
CA
ALE
AR
RWs
RWh
RDY
RC
As
Ah
RDs
RDh
WDs
WDh
Parameter
CS low to ALE low
ALE low time
ALE high to RDY low
R/W setup time
R/W hold time
RDY low time
RDY high to CS high
CS to RDY active/tristate time
Address setup time
Address hold time
Read data setup time
Read data hold time
Write data setup time
Write data hold time
Minimum delay between successive accesses
RDY
RDY
R/W
ALE
R/W
ALE
CS
AD
CS
AD
– Bus/Register access is available in 8-bit parallel or SPI form, as selected by the Bmode pin. Bmode=1
t
CR
t
CR
t
t
CA
CA
t
t
t
RWs
ALE
t
© Copyright 2001 The Connor-Winfield Corp. All Rights Reserved
RWs
ALE
t
t
As
As
Address
Address
Preliminary Data Sheet #: TM061
Parallel Bus Timing, Read Access
Parallel Bus Timing, Write Access
t
t
t
t
Ah
RWh
Ah
RWh
Parallel Bus Timing
t
t
AR
AR
Figure 3
Figure 4
Table 6
Minimum
100
300
70
50
50
50
50
50
50
50
50
0
-
-
-
t
t
RDY
RDY
t
t
WDs
RDs
Read Data
WriteData
Nominal
Page 12 of 48
t
t
WDh
RDh
t
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
t
RC
RC
Specifications subject to change without notice
t
t
CSMIN
t
CSMIN
Maximum
CR
t
CR
250
10
0
-
-
-
-
-
-
-
-
-
-
-
-
Rev: P06
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
Date: 11/22/04