Marvell 88E3015 Manual page 85

Table 56: MAC Interface Output Impedance Calibration Override
Register 30_10
B i ts F i e l d
15 Restart Calibra-
tion
14 Calibration
Complete
13 Reserved
12:8 PMOS Value
7 Reserved
6 LATCH
5 PMOS/NMOS
Select
4:0 NMOS value
Copyright © 2008 Marvell
January 4, 2008, Advance
M o d e H W S W
R s t R s t
R/W, 0x0 Retain
SC
RO 0x0 Retain
R/W 0x0 Retain
R/W See Retain
Descr
RW 0x0 Retain
R/W, 0x0 Retain
SC
R/W 0x0 Retain
R/W See Retain
Descr
Document Classification: Proprietary Information
D e s c r i p t io n
Calibration will start once bit 15 is set to 1.
0 = Normal
1 = Restart
Calibration is done once bit 14 becomes 1.
0 = Not done
1 = Done
0
00000 = all fingers off
11111 = all fingers on
The automatic calibrated values are stored here after
calibration completes.
Once LATCH is set to 1 the new calibration value is writ-
ten into the I/O pad. The automatic calibrated value is
lost.
0
1 = Latch in new value. This bit self clears.
(Used for manual settings)
0 = NMOS value written when LATCH is set to 1.
1 = PMOS value written when LATCH is set to 1.
00000 = All fingers off
11111 = All fingers on
The automatic calibrated values are stored here after
calibration completes.
Once LATCH is set to 1 the new calibration value is writ-
ten into the I/O pad. The automatic calibrated value is
lost.
Doc. No. MV-S103657-00, Rev. D
Register Description
Page 85