Keywords: DS1863
May 25, 2007
APPLICATION NOTE 4052
Quick Reference Guide to the DS1863 Memory Map
Abstract: The DS1863 burst-mode PON controller with integrated monitoring capabilities has programming options to
configure the alarms, warnings, lookup tables, and other functions. This programmability necessitates a large register
memory map. This application note provides an outline of the register map, which is convenient when programming
the device.
Memory Map of the DS1863
The DS1863 features six separate memory tables that are internally organized into eight byte rows (Figure 1).
1. The Lower Memory is addressed from 00h to 7Fh. It contains alarm and warning thresholds, flags, masks,
several control registers, password entry area (PWE), and the Table Select byte.
2. Table 01h primarily contains user EEPROM (with PW1 level access) and some alarm and warning status bytes.
3. Table 02h is a multifunction space that contains configuration registers, scaling and offset values, passwords,
interrupt registers, and miscellaneous control bytes.
4. Table 03h is strictly user EEPROM that is protected by a PW2-level password.
5. Table 04h contains a temperature-indexed lookup table (LUT) for controlling the modulation voltage. The
modulation LUT can be programmed in 2°C increments over the -40°C to +102°C range. Access to this register
is protected by a PW2-level password.
6. Table 05h contains another LUT, which allows the APC set point to change as a function of temperature to
compensate for Tracking Error (TE). This TE LUT has 36 entries that determine the APC setting in 4°C windows
between -40°C to +100°C. Access to this register is protected by a PW2-level password.
Page 1 of 6
Lower Memory
Register Name
Bit7
Bit0
6
5
4
3
2
1
-7
1
-7
1
-7
1
-7
9
1
9
1
9
1
9
1
9
1
9
1
9
1
9
1
9
1
9
1
9
1
9
1
9
1
9
1
9
1
9
1
0
00h
01h
02h
03h
04h
05h
06h
07h
08h
09h
0Ah
0Bh
0Ch
0Dh
0Eh
0Fh
10h
11h
12h
13h
14h
15h
16h
17h
18h
19h
1Ah
1Bh
1Ch
1Dh
1Eh
1Fh
20h
21h
22h
23h
24h
25h
26h
27h
S
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
TEMP ALARM HI
TEMP ALARM LO
TEMP WARN HI
TEMP WARN LO
-1
-2
6
-3
5
-4
4
-5
3
-6
2
-8
2
2
0
S
2
-1
-2
6
-3
5
-4
4
-5
3
-6
2
-8
2
2
0
S
2
-1
-2
6
-3
5
-4
4
-5
3
-6
2
-8
2
2
0
S
2
-1
-2
14
6
-3
13
5
-4
12
4
-5
11
3
-6
10
2
-8
2
2
15
8
2
2
V
V
V
V
ALARM HI
ALARM LO
WARN HI
WARN LO
CC
CC
CC
CC
7
0
2
2
15
14
6
13
5
12
4
11
3
10
2
8
2
2
7
0
2
2
15
14
6
13
5
12
4
11
3
10
2
8
2
2
7
0
2
2
15
14
6
13
5
12
4
11
3
10
2
8
2
2
7
0
2
2
15
14
6
13
5
12
4
11
3
10
2
8
2
2
MON1 ALARM HI
MON1 ALARM LO
MON1 WARN HI
MON1 WARN LO
MON2 ALARM HI
MON2 ALARM LO
MON2 WARN HI
MON2 WARN LO
MON3 ALARM HI
MON3 ALARM LO
MON3 WARN HI
7
0
2
2
15
14
6
13
5
12
4
11
3
10
2
8
2
2
7
0
2
2
15
14
6
13
5
12
4
11
3
10
2
8
2
2
7
0
2
2
15
14
6
13
5
12
4
11
3
10
2
8
2
2
7
0
2
2
15
14
6
13
5
12
4
11
3
10
2
8
2
2
7
0
2
2
15
14
6
13
5
12
4
11
3
10
2
8
2
2
7
0
2
2
15
14
6
13
5
12
4
11
3
10
2
8
2
2
7
0
2
2
15
14
6
13
5
12
4
11
3
10
2
8
2
2
7
0
2
2
15
14
6
13
5
12
4
11
3
10
2
8
2
2
7
0
2
2
15
14
6
13
5
12
4
11
3
10
2
8
2
2
7
0
2
2
15
14
6
13
5
12
4
11
3
10
2
8
2
2
7
0
2
2
15
14
6
13
5
12
4
11
3
10
2
8
2
2
MON3 WARN LO
7
0
2
2
SHADOWED EEPROM
28h-2Fh SEE
SEE
SEE
SEE
SEE
SEE
SEE
SEE
Page 3 of 6
PW2 EE
30h-5Fh EE
EE
EE
EE
EE
EE
EE
EE
6
5
4
3
2
1
0
60h
61h
62h
63h
64h
65h
66h
67h
68h
69h
S
2
2
2
2
2
2
2
TEMP VALUE
-1
-2
-3
-4
-5
-6
-7
-8
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
15
7
14
6
13
5
12
4
11
3
10
2
9
1
9
1
9
1
9
1
8
0
8
0
8
0
8
0
V
VALUE
CC
15
7
14
6
13
5
12
4
11
3
10
2
MON1 VALUE
MON2 VALUE
MON3 VALUE
15
7
14
6
13
5
12
4
11
3
10
2
15
7
14
6
13
5
12
4
11
3
10
2
FETG
STATUS
SOFT
FETG
TX-F
RESET
SOFT
TX-D
TX-F
STATUS
STATUS
UPDATE
6Eh
RSVD
RSVD
RSVD
RDYB
RSVD
V
RDY
6Fh
70h
71h
72h
73h
74h
75h
TEMP RDY
MON1 RDY MON2 RDY MON3 RDY RSVD
HI LO
CC
ALARM
V
V
CC
TEMP HI TEMP LO
MON1 HI MON1 LO MON2 HI MON2 LO
3
CC
ALARM
MON3 HI MON3 LO RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
TX-P HI TX-P LO
RSVD RSVD
MON1 HI MON1 LO MON2 HI MON2 LO
RSVD
2
ALARM
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
BIAS HI
RSVD
1
ALARM
BIAS MAX RSVD
0
WARN
V
HI
V
LO
CC
TEMP HI TEMP LO
MON3 HI MON3 LO RSVD
3
CC
WARN
RSVD
RSVD
RSVD
RSVD
RSVD
2
31
23
15
7
30
22
14
6
29
21
13
5
28
27
26
25
24
7Bh
7Ch
7Dh
7Eh
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
20
19
18
17
16
2
2
2
2
2
PASSWORD ENTRY
(PWE)
12
11
10
9
8
2
2
2
2
2
4
3
2
1
0
2
2
2
2
2
TABLE SELECT (TBL
SEL)
7
6
5
4
3
2
1
0
7Fh
2
2
2
2
2
2
2
2
Table 01h
Bit7
Bit0
PW1 EEPROM 80h-F7h EE
EE
EE
V
EE
HI V LO
MON1 HI MON1 LO MON2 HI MON2 LO
EE
EE
EE
EE
ALARM
ALARM
ALARM
ALARM
WARN
F8h
F9h
FAh
FBh
FCh
FDh
TEMP HI TEMP LO
3
2
1
0
CC
CC
MON3 HI MON3 LO RSVD RSVD RSVD
RSVD
RSVD
TX-P HI TX-P LO
RSVD RSVD
MON1 HI MON1 LO MON2 HI MON2 LO
MON3 HI MON3 LO RSVD RSVD RSVD RSVD RSVD RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD RSVD BIAS HI
RSVD
RSVD RSVD BIAS MAX RSVD
HI V LO
V
TEMP HI TEMP LO
3
CC
CC
WARN
2
Page 4 of 6
Table 02h
Bit7
Bit0
MODE
80h
81h
82h
83h
84h
85h
86h
87h
86h
89h
8Ah
SEEB
RSVD
RSVD
RSVD
AEN
MOD-EN APC-EN BIAS-EN
7
6
5
4
3
2
2
2
9
2
1
1
1
8
1
0
0
0
7
0
T INDEX
MOD DAC
APC DAC
2
2
2
2
2
2
2
2
2
2
0
2
2
2
2
2
1
2
2
2
2
2
1
7
6
5
4
3
2
2
2
2
2
7
6
5
4
3
2
2
2
2
2
12
11
10
0
0
2
2
2
BIAS DAC
7
6
5
4
3
2
2
2
2
2
DEVICE ID
0
1
1
0
0
DEVICE VER
UPDATE RATE
CONFIG
DEVICE VERSION
0
0
0
0
SR(3:0) SR(3:0) SR(3:0) SR(3:0)
FETG DIR TX-F EN
RSVD
ASEL
RSVD
RSVD
RSVD
RSVD
12
11
10
9
8
7
6
5
START-UP STEP
2
2
2
2
2
2
2
2
MOD
MOD
MOD
MOD RANGING
8Bh
RSVD
RSVD
RSVD
RSVD
RSVD
2
1
0
7
6
5
4
3
2
1
DEVICE ADDRESS 8Ch
COMP RANGING 8Dh
X
2
2
2
2
2
2
2
APC
APC
APC
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
2
1
0
RIGHT SHIFT
8Eh
8Fh
MON1_2
MON3_2
MON1_1
MON3_1
MON1_0
MON3_0
MON2_2 MON2_1 MON2_0
1
0
RIGHT SHIFT
RSVD
RSVD
RSVD
92, 94,
96, 98,
9Ah
15
14
13
12
11
10
9
8
2
2
2
2
2
2
2
2
V
SCALE
CC
MON1-4 SCALE
93, 95,
97, 99,
9Bh
7
6
5
4
3
2
1
0
2
2
2
2
2
2
2
2
A2, A4,
A6, A8,
AAh
15
14
13
12
11
10
S
S
2
2
2
2
2
2
V
OFFSET
CC
MON1-4 OFFSET A3, A5,
9
8
7
6
5
4
3
2
A7, A9,
ABh
2
2
2
2
2
2
2
2
8
7
6
5
4
3
2
AEh
TEMP OFFSET
AFh
S
2
2
2
2
2
2
2
1
0
-1
-2
-3
-4
-5
-6
2
2
2
2
2
2
2
2
31
30
29
28
27
26
25
24
B0h, B4h
2
2
2
2
2
2
2
2
23
22
21
20
19
18
17
16
B1h, B5h
PW1, PW2
2
2
2
2
2
2
2
2
15
14
13
12
11
10
9
8
B2h, B6h
2
2
2
2
2
2
2
2
7
6
5
4
3
2
1
0
B3h, B7h
2
2
2
2
2
2
2
2
FETG ENABLE
FETG ENABLE
TX-F ENABLE
V
EN
CC
B8h
B9h
BAh
BBh
TEMP EN
MON1 EN MON2 EN
MON3 EN RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
1
TX-P HI EN TX-P LO EN BIAS HI EN BIAS MAX EN RSVD
RSVD
RSVD
0
V
EN
CC
TEMP EN
MON1 EN MON2 EN
MON3 EN RSVD
RSVD
1
TX-F ENABLE
TX-P HI EN TX-P LO EN BIAS HI EN BIAS MAX EN RSVD
RSVD
FETG EN
0
7
6
5
4
4
4
9
3
3
3
8
2
1
0
HTXP
BCh
BDh
BEh
BFh
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
7
6
5
2
1
0
LTXP
2
2
2
7
6
5
2
1
0
HBIAS
MAX IBIAS
2
2
2
12
11
10
7
6
5
2
2
2
Page 5 of 6
12
5
11
4
10
3
9
2
8
1
7
0
F8h
F9h
FAh
RSVD
RSVD
2
2
2
2
2
2
2
2
2
2
2
2
MAN IBIAS
MAN_CNTL
7
6
2
2
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
MAN_CLK
Application Note 4052: http://www.maxim-ic.com/an4052
More Information
For technical questions and support: http://www.maxim-ic.com/support
For samples: http://www.maxim-ic.com/samples
Other questions and comments: http://www.maxim-ic.com/contact
Related Parts
DS1863:
AN4052, AN 4052, APP4052, Appnote4052, Appnote 4052
Copyright © by Maxim Integrated Products
Additional legal notices: http://www.maxim-ic.com/legal
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