Ds1874 sfp+ controller with digital ldd interface – Rainbow Electronics DS1874 User Manual
Page 80
DS1874
SFP+ Controller with Digital LDD Interface
80
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Table 02h, Register EDh: IMODMAX
FACTORY
DEFAULT
00h
READ ACCESS
PW2 or (PW1 and RWTBL246) or (PW1 and RTBL246)
WRITE ACCESS
PW2 or (PW1 and RWTBL246)
MEMORY
TYPE Nonvolatile
(SEE)
EDh 2
7
2
6
2
5
2
4
2
3
2
2
2
1
2
0
BIT
7
BIT
0
MAX3798/MAX3799 register. After either V
CC
exceeds POA (after a POR event), the MAX3798/MAX3799 TX_POR
bit is set high (visible in 3W TXSTAT1, Bit 7) or on a rising edge of TXD, this value is written to the MAX3798/
MAX3799 through the 3-wire interface.
FACTORY
DEFAULT
00h
READ ACCESS
PW2 or (PW1 and RWTBL246) or (PW1 and RTBL246)
WRITE ACCESS
PW2 or (PW1 and RWTBL246)
MEMORY TYPE
Nonvolatile (SEE)
EEh 2
7
2
6
2
5
2
4
2
3
2
2
2
1
2
0
BIT
7
BIT
0
MAX3798/MAX3799 register. After either V
CC
exceeds POA (after a POR event), the MAX3798/MAX3799 TX_POR
bit is set high (visible in 3W TXSTAT1, Bit 7) or on a rising edge of TXD, this value is written to the MAX3798/
MAX3799 through the 3-wire interface. In addition, this value defines the maximum DAC value allowed for the
upper 8 bits of BIAS output during APC closed-loop operations. During the intial step and binary search, this
value does not cause an alarm but still clamps the BIAS register value. After the startup seqence (or normal
APC operations), if the APC loop tries to create a BIAS value greater than this setting, it is clamped and creates
a MAX BIAS alarm.
Table 02h, Register EEh: IBIASMAX