BBT3821 Datasheet, PDF (24/75 Pages) Intersil Corporation – Octal 2.488Gbps to 3.187Gbps/ Lane Retimer

BBT3821
BIT
1.14.15:0
1.15.15:0
NAME
Package ID
Package ID
Table 14. IEEE PACKAGE IDENTIFIER REGISTERS
MDIO REGISTER ADDRESSES = 1.14:15 (1.000E:F’h)
SETTING
DEFAULT
R/W
DESCRIPTION
Package OUI bits 3:24 & 00’h
etc.
00’h
R/W
If NVR is loaded, these are copies of
1.32818:32819 (1.8032:8033’h) & 1.32820:32821
R/W
(1.8034:8035’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
NAME
SETTING
DEFAULT R/W
DESCRIPTION
1.32768.15:6
1.32768.5
Reserved
NVR Command⁽¹⁾
1 = Write NVR
0 = Read NVR
000’h
0’b⁽²⁾
R/W
R/W
Write/Read Control for I²C operation
1.32768.4
Reserved
0’b
RO
1.32768.3:2
NVR Command Current Status of 00’b
Status⁽³⁾
NVR Command
1.32768.1:0
Extended NVR
Command
NVR operation to be 11’b⁽²⁾
performed
RO
11 = Command failed
10 = Command in progress/Queued
01 = Command completed with success
00 = Idle
R/W
10 = read/write one byte⁽³⁾
11 = read/write all NVR contents⁽³⁾
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)
BIT
1.32769.15:8
1.32769.7:0
NAME
Reserved
Device
Address
Table 16. I²C ONE-BYTE OPERATION DEVICE ADDRESS REGISTER
MDIO REGISTER ADDRESS = 1.32769 (1.8001’h)
SETTING
DEFAULT R/W
DESCRIPTION
I²C Device address to
access
00’h
A2’h
RO
R/W
All I²C Device addresses are even. Bit 0 cannot be set.
Table 17. I²C ONE-BYTE OPERATION MEMORY ADDRESS REGISTER
MDIO REGISTER, ADDRESS = 1.32770 (1.8002’h)
BIT
1.32770.15:0
NAME
Memory
Address
SETTING
I²C Memory address to
access
DEFAULT R/W
0000’h⁽²⁾
R/W
DESCRIPTION
I²C Memory Address within Device address of 1.32769
(1.8001’h)
Note (1): 8-bit-addressed I²C 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 I²C device.
BIT
1.32771.15:8
1.32771.7:0
NAME
Reserved
Read Data
Table 18. I²C ONE-BYTE OPERATION READ DATA REGISTER
MDIO REGISTER ADDRESS = 1.32771 (1.8003’h)
SETTING
DEFAULT R/W
DESCRIPTION
00’h
I²C Read Data
00’h
RO
RO
Result of I²C 1-byte Read operation
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