APPLICATION NOTE 4110

DS1865 Quick Reference Guide

By: Hrishikesh Shinde

Abstract: The DS1865 burst-mode PON controller with integrated monitoring provides programming options required to configure the alarms, warnings, lookup tables, and other functions detailed in Application Note 4052, Quick Reference Guide to the DS1863 Memory Map. This programmability necessitates a large register memory map. This application note provides an alternate outline of the register map, which is convenient when programming the device.

Introduction

The DS1865 is a burst-mode PON controller with integrated monitoring capabilities. It features seven separate memory tables that are internally organized into eight byte rows. In addition this controller has auxiliary memory, which is EEPROM accessible at the A0h slave address.

Memory Map of the DS1865

The Lower Memory is addressed from 00h to 7Fh. This memory contains alarm and warning thresholds, flags, masks, several control registers, password entry area (PWE), and the Table Select byte. See Figure 1.

Table 01h primarily contains EEPROM (with PW1-level access) and some alarm and warning status bytes.

Table 02h is a multifunction space that contains configuration registers, scaling and offset values, passwords, interrupt registers, and other miscellaneous control bytes.

Table 03h is strictly EEPROM that is protected by a PW2-level password.

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 LUT is protected by a PW2-level password.

Table 05h contains another LUT which allows the APC set point to change as a function of temperature to compensate for Tracking Error (TE). The TE LUT has 36 entries that determine the APC setting in 4°C windows between -40°C to +100°C. Access to this LUT is protected by a PW2-level password.

Table 06h contains a MON4-indexed LUT for controlling the M4DAC voltage. The M4DAC LUT has 32 entries that are configurable to act as one 32-entry LUT or two 16-entry LUTs. When configured as one 32-entry LUT, each entry corresponds to an increment of 1/32 of the full scale. When configured as two 16-entry LUTs, the first 16 entries and the last 16 entries each correspond to 1/16 of full scale. Either of the two 16-entry sections is selected with a separate configuration bit. Access to this LUT is protected by a PW2-level password.

Figure 1. DS1865 memory map.
Figure 1. DS1865 memory map.

Register Reference

The following tables provide an easy reference to the Lower Memory, and Tables 01h and 02h. For a description of the functionality for each bit, please refer to the corresponding register in the DS1865 data sheet. Tables 03h, 04h, 05h, and 08h are LUTs that do not require a separate reference, and thus are not included here. (Please refer to the data sheet for detailed information about these tables.)

Note: RSVD is used as an acronym for Reserved.

Lower Memory Table
TEMP ALARM HI
TEMP WARN HI
00h, 04h S 26 25 24 23 22 21 20
01h, 05h 2-1 2-2 2-3 2-4 2-5 2-6 2-7 2-8
TEMP ALARM LO
TEMP WARN LO
02h, 06h S 26 25 24 23 22 21 20
03h, 07h 2-1 2-2 2-3 2-4 2-5 2-6 2-7 2-8
VCC ALARM HI
VCC WARN HI
08, 0C, 10, 14, 18, 1C, 20, 24, 25, 2Ch 215 214 213 212 211 210 29 28
MON1-4 ALARM HI
MON1-4 WARN HI
09, 0D, 11, 15, 19, 1D, 21, 25, 29, 2Dh 27 26 25 24 23 22 21 20
VCC ALARM LO
VCC WARN LO
0A, 0E, 12, 16, 1A, 1E, 22, 26, 2A, 2Eh 215 214 213 212 211 210 29 28
MON1-4 ALARM LO
MON1-4 WARN LO
0B, 0F, 13, 17, 1B, 1F, 23, 27, 2B, 2Fh 27 26 25 24 23 22 21 20
PW2 EE 30h-5Fh EE EE EE EE EE EE EE EE
TEMP VALUE 60h S 26 25 24 23 22 21 20
61h 2-1 2-2 2-3 2-4 2-5 2-6 2-7 2-8
VCC VALUE,
MON1-4 VALUE
62, 64, 66, 68, 6Ah 215 214 213 212 211 210 29 28
63, 65, 67, 69. 6Bh 27 26 25 24 23 22 21 20
RESERVED 6C, 6Dh 0 0 0 0 0 0 0 0
STATUS 6Eh FETG
STATUS
SOFT
FETG
RSVD TX-F
RESET
SOFT
TX-D
TX-F
STATUS
LOS
STATUS
RDYB
UPDATE 6Fh TEMP
RDY
VCC RDY MON1
RDY
MON2
RDY
MON3
RDY
MON4
RDY
RSVD RSVD
ALARM3 70h TEMP HI TEMP LO VCC HI VCC LO MON1 HI MON1 LO MON2 HI MON2 LO
ALARM2 71h MON3 HI MON3 LO MON4 HI MON4 LO RSVD RSVD RSVD RSVD
ALARM1 72h RSVD RSVD RSVD RSVD BIAS HI RSVD TX-P HI TX-P LO
ALARM0 73h RSVD RSVD RSVD RSVD BIAS MAX RSVD RSVD RSVD
WARN3 74h TEMP HI TEMP LO VCC HI VCC LO MON1 HI MON1 LO MON2 HI MON2 LO
WARN2 75h MON3 HI MON3 LO MON4 HI MON4 LO RSVD RSVD RSVD RSVD
RESERVED 76, 77h 0 0 0 0 0 0 0 0
DOUT 78h RSVD RSVD RSVD RSVD D3 OUT D2 OUT D1 OUT D0 OUT
DIN 79h RSVD RSVD INV LOSI MUX LOSI D3 IN D2 IN D1 IN D0 IN
RESERVED 7Ah 0 0 0 0 0 0 0 0
PASSWORD
ENTRY
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
TABLE SELECT 7Fh 27 26 25 24 23 22 21 20

TABLE 01h
PW1 EEPROM 80h–F7h EE EE EE EE EE EE EE EE
ALARM3 F8h TEMP HI TEMP LO VCC HI VCC LO MON1 HI MON1 LO MON2 HI MON2 LO
ALARM2 F9h MON3 HI MON3 LO MON4 HI MON4 LO RSVD RSVD RSVD RSVD
ALARM1 FAh RSVD RSVD RSVD RSVD BIAS HI RSVD TX-P HI TX-P LO
ALARM0 FBh RSVD RSVD RSVD RSVD BIAS MAX RSVD RSVD RSVD
WARN3 FCh TEMP HI TEMP LO VCC HI VCC LO MON1 HI MON1 LO MON2 HI MON2 LO
WARN2 FDh MON3 HI MON3 LO MON4 HI MON4 LO RSVD RSVD RSVD RSVD
RESERVED FE-FFh 0 0 0 0 0 0 0 0

TABLE 02h
MODE 80h SEEB RSVD RSVD M4DAC-EN AEN MOD-EN APC-EN BIAS-EN
T INDEX 81h 27 26 25 24 23 22 21 20
MOD DAC 82h 27 26 25 24 23 22 21 20
APC DAC 83h 27 26 25 24 23 22 21 20
V INDEX 84h 27 26 25 24 23 22 21 20
M4DAC 85h 27 26 25 24 23 22 21 20
DEVICE ID 86h 0 1 1 0 0 1 0 1
DEVICE VER 87h
DEVICE VERSION
UPDATE RATE 88h 0 0 0 0 SR3 SR2 SR1 SR0
CONFIG 89h FETG DIR TX-F EN RSVD ASEL RSVD RSVD RSVD RSVD
START-UP STEP 8Ah 212 211 210 29 28 27 26 25
MOD RANGING 8Bh RSVD RSVD RSVD RSVD RSVD MOD2 MOD1 MOD0
DEVICE ADDRESS 8Ch 27 26 25 24 23 22 21 20
COMP RANGING 8Dh RSVD BIAS2 BIAS1 BIAS0 RSVD APC2 APC1 APC0
RIGHT SHIFT1 8Eh RSVD MON12 MON11 MON10 RSVD MON22 MON21 MON20
RIGHT SHIFT0 8Fh RSVD MON32 MON31 MON30 RSVD MON42 MON41 MON40
RESERVED 90–91h 0 0 0 0 0 0 0 0
VCC SCALE
MON1-4 SCALE
92, 94, 96, 98, 9Ah 215 214 213 212 211 210 29 28
93, 95, 97, 99, 9Bh 27 26 25 24 23 22 21 20
RESERVED 9C–A1h 0 0 0 0 0 0 0 0
VCC OFFSET
MON1-4 OFFSET
A2, A4, A6, A8, AAh S S 215 214 213 212 211 210
A3, A5, A7, A9, ABh 29 28 27 26 25 24 23 22
RESERVED AC-ADh 0 0 0 0 0 0 0 0
TEMP OFFSET AEh S 28 27 26 25 24 23 22
AFh 21 20 2-1 2-2 2-3 2-4 2-5 2-6
PW1 B0h 231 230 229 228 227 226 225 224
B1h 223 222 221 220 219 218 217 216
B2h 215 214 213 212 211 210 29 28
B3h 27 26 25 24 23 22 21 20
PW2 B4h 231 230 229 228 227 226 225 224
B5h 223 222 221 220 219 218 217 216
B6h 215 214 213 212 211 210 29 28
B7h 27 26 25 24 23 22 21 20
FETG ENABLE1 B8h TEMP EN VCC EN MON1 EN MON2 EN MON3 EN MON4 EN RSVD RSVD
FETG ENABLE0 B9h HTXP EN LTXP EN BIAS HI EN BIAS MAX EN RSVD RSVD RSVD RSVD
TX-F ENABLE1 BAh TEMP EN VCC EN MON1 EN MON2 EN MON3 EN MON4 EN RSVD RSVD
TX-F ENABLE0 BBh HTXP EN LTXP EN BIAS HI EN BIAS MAX EN RSVD RSVD RSVD FETG EN
HTXP BCh 27 26 25 24 23 22 21 20
LTXP BDh 27 26 25 24 23 22 21 20
HBIAS BEh 27 26 25 24 23 22 21 20
MAX IBIAS BFh 212 211 210 29 28 27 26 25
DPU C0h RSVD RSVD INV LOSI MUX LOSI D3 CNTL D2 CNTL D1 CNTL D0 CNTL
RESERVED C1–C3h 0 0 0 0 0 0 0 0
DAC1 C4h 27 26 25 24 23 22 21 20
RESERVED C5–C6h 0 0 0 0 0 0 0 0
M4 LUT C7h RSVD RSVD RSVD RSVD RSVD RSVD DBL_SB UP_LOWB
MAN IBIAS F8h RSVD RSVD 212 211 210 29 28 27
F9h 27 26 25 24 23 22 21 20
MAN_CNTL FAh RSVD RSVD RSVD RSVD RSVD RSVD RSVD MAN_CLK
BIAS DAC FBh 0 0 212 211 210 29 28 27
FCh 27 26 25 24 23 22 21 20
RESERVED FD-FEh 0 0 0 0 0 0 0 0


Related Parts
DS1865 Free Sample
Next Steps
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APP 4110:
APPLICATION NOTE 4110,AN4110, AN 4110, APP4110, Appnote4110, Appnote 4110