BBT3821
Table 14. IEEE PACKAGE IDENTIFIER REGISTERS
MDIO REGISTER ADDRESSES = 1.14:15 (1.000E:F’h)
BIT
1.14.15:0
1.15.15:0
NAME
Package ID
Package ID
SETTING
DEFAULT
R/W
R/W
R/W
DESCRIPTION
Package OUI bits 3:24 & 00’h
If NVR is loaded, these are copies of
1.32818:32819 (1.8032:8033’h) & 1.32820:32821
(1.8034:8035’h)
etc.
00’h
XENPAK-DEFINED REGISTERS (1.8000’H TO 1.8106’H)
Table 15. XENPAK NVR CONTROL & STATUS REGISTER
MDIO (XENPAK) REGISTER ADDRESS = 1.32768 (1.8000’h)
BIT
1.32768.15:6
1.32768.5
NAME
Reserved
SETTING
DEFAULT
000’h
R/W
R/W
DESCRIPTION
(1)
(2)
2
NVR Command
1 = Write NVR
0 = Read NVR
0’b
R/W
Write/Read Control for I C operation
1.32768.4
Reserved
0’b
RO
RO
1.32768.3:2
NVR Command
Current Status of
NVR Command
00’b
11 = Command failed
(3)
Status
10 = Command in progress/Queued
01 = Command completed with success
00 = Idle
(2)
(3)
1.32768.1:0
Extended NVR
Command
NVR operation to be 11’b
performed
R/W
10 = read/write one byte
(3)
11 = read/write all NVR contents
Other values = reserved
Note (1): User writes to these bits are not valid unless the Command Status is Idle. The Command Status will not return to Idle until read after command completion
(either Succeed or Failed).
Note (2): At the end of a hardware RESET via the RSTN pin, on powerup, or on a register [1,3,4].0.15 RESET operation, and if the XP_ENA pin is asserted, the
BBT3821 will automatically begin an ‘all NVR read’ operation.
Note (3): The single byte commands are controlled through the bits of the registers at 1.32769:32774 (1.8001:8006’h). The ‘block write/read’ commands are affected by
register 1.32773 (1.8005’h). Additional status is available in 1.327743 (1.8006’h)
2
Table 16. I C ONE-BYTE OPERATION DEVICE ADDRESS REGISTER
MDIO REGISTER ADDRESS = 1.32769 (1.8001’h)
BIT
1.32769.15:8
1.32769.7:0
NAME
SETTING
DEFAULT
00’h
R/W
RO
R/W
DESCRIPTION
Reserved
2
2
Device
Address
I C Device address to
access
A2’h
All I C Device addresses are even. Bit 0 cannot be set.
2
Table 17. I C ONE-BYTE OPERATION MEMORY ADDRESS REGISTER
MDIO REGISTER, ADDRESS = 1.32770 (1.8002’h)
BIT
NAME
SETTING
DEFAULT
R/W
R/W
DESCRIPTION
2
(2)
2
1.32770.15:0
Memory
Address
I C Memory address to
access
0000’h
I C Memory Address within Device address of 1.32769
(1.8001’h)
2
2
Note (1): 8-bit-addressed I C devices are addressed using bits 7:0. Never set bit 1.32773.8 (1.8005’h.8) for 16-bit address operation with an 8-bit address I C device.
2
Table 18. I C ONE-BYTE OPERATION READ DATA REGISTER
MDIO REGISTER ADDRESS = 1.32771 (1.8003’h)
BIT
1.32771.15:8
1.32771.7:0
NAME
Reserved
Read Data
SETTING
DEFAULT
00’h
R/W
RO
RO
DESCRIPTION
2
2
I C Read Data
00’h
Result of I C 1-byte Read operation
24
INTERSIL [ Intersil ]
