Rainbow Electronics LM41 - Manual (Page 16)

2.0 Register Set
(Continued)
* Depends on state of ADD pins see Section 2.3 "Device Number".
2.2 DEVICE RESET OPERATION
A Device Reset operation is performed in the following conditions:
• At device power-up.
• When the Reset bit in the Device Control register is set to 1 (see Section 2.8 "Device Control").
The Device Reset operation performs the following:
• Aborts any device operation in progress and restarts device operation.
• Sets all device registers to their "Reset" (default) value.
2.3 DEVICE NUMBER (Addr: 000 000; 00h)
This register is used to specify a unique address for each device on the bus.
Reg Add Register Name
R/
W
P
O
R
Val
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1
Bit 0
LSb
000 000 Device Number R 7h or 1h
Reserved
AS2 AS1 AS0
0 0 0 0 0
The value of [AS2:AS0] is determined by the setting of the ADD input pin:
TABLE 1. Device Number Assignment
ADD [AS2:AS0]
0 001
1 111
The value of [AS2:AS0] will directly change and follow the value determined by ADD. Since this is a read only register the value
of the address cannot be changed by software.
2.4 MANUFACTURER ID (Addr: 000 001; 01h)
Reg
Add
Register
Name
R/
W
P
O
R
Val
Bit
15
MSb
Bit
14
Bit
13
Bit
12
Bit
11
Bit
10
Bit
9
Bit
8
Bit
7
Bit
6
Bit
5
Bit
4
Bit
3
Bit
2
Bit
1
Bit
0
LSb
000 001
Manufacturer
ID
R 100Bh 0 0 0 1 0 0 0 0 0 0 0 0 1 0 1 1
The manufacturer ID matches that assigned to National Semiconductor by the PCI SIG. This register may be used to identify the
manufacturer of the device in order to perform manufacturer specific operations.
LM41
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