 English |
|
|
|
|
|
|
|
| DS1878 Datasheet, PDF (52/101 Pages) Maxim Integrated Products – SFP+ Controller with Digital LDD Interface | |||
| |||
| ◁ |
SFP+ Controller with Digital LDD Interface
Lower Memory, Register 7Bhâ7Eh: PASSWORD ENTRY (PWE)
POWER-ON VALUE
READ ACCESS
WRITE ACCESS
MEMORY TYPE
FFFF FFFFh
N/A
All
Volatile
7Bh
231
230
229
228
227
226
225
224
7Ch
223
222
221
220
219
218
217
216
7Dh
215
214
213
212
211
210
29
28
7Eh
27
26
25
24
23
22
21
20
BIT 7
BIT 0
There are two passwords for the device. Each password is 4 bytes long. The lower level password (PW1) has all the
access of a normal user plus those made available with PW1. The higher level password (PW2) has all the access of
PW1 plus those made available with PW2. The values of the passwords reside in EEPROM inside PW2 memory. At
power-up, all PWE bits are set to 1. All reads at this location are 0.
Lower Memory, Register 7Fh: TABLE SELECT (TBL SEL)
POWER-ON VALUE
READ ACCESS
WRITE ACCESS
MEMORY TYPE
TBLSELPON (Table 02h, Register C7h)
All
All
Volatile
7Fh
27
26
25
24
23
22
21
20
BIT 7
BIT 0
The upper memory tables of the device are accessible by writing the desired table value in this register. The power-on
value of this register is defined by the value written to TBLSELPON (Table 02h, Register C7h).
52 ______________________________________________________________________________________
|
▷ |
German
Russian
Spanish
Italian
Polish
Chinese
Japanese
Korean
French
Portuguese