DP83907VF National Semiconductor, DP83907VF Datasheet - Page 26

• Manufacturer Part Number: DP83907VF
• Description: IC CONTROLLR AT/LANII TP 160PQFP
• Manufacturer: National Semiconductor

Specifications of DP83907VF

• Controller Type: Network Interface Controller (NIC)
• Interface: Twisted Pair
• Voltage - Supply: 4.75 V ~ 5.25 V
• Current - Supply: 150mA
• 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: *DP83907VF

0–3
0–3
Bit
5 0 Register Descriptions
SIGNATURE REGISTER
This register is intended to allow the software programmer to determine which of the DP83907 family of devices and what board
configuration is being used This register is ‘‘hidden’’ behind a used register Register 01H in the DP83907’s Page 1 of registers
is Physical Address Register 0 which is read write Now the Signature Register can be read at that address by following a read
to 01H on Page 1 with another read to 01H If any other DP83907 register accesses take place between the two reads then the
second read will access Physical Address Register 0 All writes are to Physical Address Register 0 The user can determine if
the Signature Register exists by writing while in Page 1 a known value to the Physical Address Register 0 then reading it back
twice The first read will be the known value If the second read is not equal to the value written then the Signature Register
exists This operation should only be attempted while the DP83907 is in STOP mode (STP bit in the Command Register
set high)
4
(MSA11 –13)
REV0 –3
Symbol
SIG5 –7
EEPR
DP83907 FAMILY REVISION Shows that this is an DP83907 by holding the value
Rev 3
EEPROM PROGRAMMED If the upper byte of the EEPROM contains 073H when loaded into the
DP83907 this bit will be high
BOARD REVISION Shows that this board uses an NE2000 Architecture compatible interrupt structure
Sig 7
1
0
SIG7
7
Rev 2
Sig 6
0
0
SIG6
6
(Continued)
Rev 1
Sig 5
SIG5
0
0
5
Rev 0
EEPR
4
0
26
REV3
3
Function
REV2
2
REV1
1
REV0
0