DP83934AVQB National Semiconductor, DP83934AVQB Datasheet - Page 92

• Manufacturer Part Number: DP83934AVQB
• Description: IC CTRLR ORIENT NETWORK 160PLCC
• Manufacturer: National Semiconductor

Specifications of DP83934AVQB

• Controller Type: Network Interface Controller (NIC)
• Interface: Twisted Pair
• Voltage - Supply: 4.75 V ~ 5.25 V
• Current - Supply: 140mA
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 160-MQFP, 160-PQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: *DP83934AVQB

9 0 AC and DC Specifications
REGISTER WRITE BMODE
Note 1 This figure shows a slave access to the SONIC-T The BSCK states (T1 T2 etc ) are the equivalent processor states during a slave access
Note 2 If CS is deasserted before the falling edge of SAS T76 T79 and T85 are referenced from the rising edge of CS
Note 3 bcyc
Note 4 It is not necessary to meet the setup time for CS (T56) and the setup time for SAS (T62) since these signals are asynchronously sampled Meeting these
setup times for these signals however makes it possible to use T60a to determine exactly when SMACK will be asserted For multiple register accesses CS can
be held low and SAS can be used to delimit the slave cycle In this case SMACK will be driven low by the SONIC-T after T60a when T62 is met T85a must be met
to ensure proper slave operation once CS is deasserted
Note 5 The smaller value for T60a refers to when the SONIC-T is accessed during an Idle condition and the other value refers to when the SONIC-T is accessed
during non-idle conditions These values are not tested but are guaranteed by design
Note 6 SAS may be asserted low anytime before or simultaneous to the falling edge of CS Register address and slave read write signals are latched on the rising
edge of the SAS and if T62 is met SMACK will be asserted by the SONIC-T after T60a If T62 is not met SONIC-T will sample SAS again on the next falling edge
of the clock and SMACK will not be asserted until SAS is deasserted
Number
T56
T60a
T62
T63
T64
T65
T70
T71
T75
T76
T79
T81
T83
T84
T85a
e
bus clock cycle time (T3)
CS Asynchronous Setup to BSCK (Notes 4 6)
CS and SAS to SMACK Low (Notes 3 5 6)
SAS Asynchronous Setup to BSCK (Notes 4 6)
Register Address Setup Time to SAS
Register Address Hold Time from SAS
Minimum SAS Low Width (Notes 4 6)
SWR (Write) Setup to SAS
SWR (Write) Hold from SAS
BSCK to RDYo Low
SAS or CS to RDYo High (Note 2)
SAS or CS to SMACK High (Note 2)
BSCK to SMACK Low
Register Write Data Setup to BSCK
Register Write Data Hold from BSCK
Minimum CS Deassert Time (Note 3)
e
0 (Note 1)
Parameter
(Continued)
92
Min
20
14
8
0
7
7
8
7
8
8
1
20 MHz
Max
20
34
18
22
4
Min
17
12
7
0
6
6
7
6
7
7
1
25 MHz
Max
18
32
16
20
4
TL F 11719 – 89
Units
bcyc
bcyc
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns