LU82551QM Intel, LU82551QM Datasheet - Page 68

• Manufacturer Part Number: LU82551QM
• Manufacturer: Intel

Specifications of LU82551QM

• Operating Supply Voltage (typ): 3.3V
• Operating Supply Voltage (min): 3V
• Operating Supply Voltage (max): 3.6V
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 196
• Lead Free Status / RoHS Status: Compliant

82551QM — Networking Silicon
9.2.3
9.2.4
9.2.5
9.2.6
62
Table 24. Modem Status Register
Table 25. Modem Revision Register
Modem Status Register
The Modem Status field is a 16-bit word register. It provides basic track of CardBus related events.
All bits are cleared by RST#.
Modem Revision ID Register
The Modem Revision ID register is a Dword, read only field. It is composed of the Revision ID
byte and a 24-bit Class Code register. Its value is loaded from the EEPROM. The Class Code
identifies the function as a modem. The Class Code and Revision ID are listed in
Modem Header Type Register
The Modem Header Type field is a byte wide, read only register. It indicates that this is a
multifunction card and a value of 80h is hard-coded in the silicon.
Modem I/O Base Address Register
The Modem I/O BAR is a Dword register that specifies the I/O base address for accessing the
82551QM’s modem. The required I/O space is 8 bytes.
15
14
13:11
10:9
8
7
6:5
4
3:0
31:24
23:16
15:8
7:0
Bits
Bits
0
0
000
01
0
0
00
1
0000
07h
00h
02h
XXH
Default
Default
Read/Write
Read/Write
Read Only
Read Only
Read Only
Read Only
Read Only
Read Only
Read Only
Read Only
Read Only
Read Only
Read Only
Read/Write
Read/Write
Parity Error.
System Error Enable.
Signaled/Received Target Abort.
Device Select Timing.
Data Parity Detect.
Fast Back-to-Back Capable.
Reserved. These bits are reserved and should be set to 00b.
New Capability.
Reserved. These bits are reserved and should be set to 0000b.
Base Class. This indicates that the 82551QM is a communication
device.
Subclass. This indicates the serial controller equals 00h.
Program Interface. This indicates that the 82551QM is 16550 UART
compatible and initialized by EEPROM word FEh.
Revision Number. This indicates the revision number and is initialized
by EEPROM word FEh.
Description
Description
Table
Datasheet
25.