DS1865 Quick Reference Guide

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Abstract: The DS1865 burst mode PON controller has a built-in monitoring circuit that can be used to configure alarms, early warnings, lookup tables, and other detailed functions in the application note 4052 (DS1863 Memory Quick Guide) To achieve these programming functions, a large-capacity mapping register is required. This application note provides an overview of register maps to facilitate device programming.

Introduce the DS1865 burst mode PON controller built-in monitoring circuit. The device has seven independent memory tables arranged in 8-byte rows internally. In addition, the controller also has auxiliary memory, these memories are EEPROM, can be read from the address through A0h.

DS1865 memory map low-level memory addresses from 00h to 7Fh. The memory contains alarms, early warning thresholds, signs, masks and several control registers, password input area (PWE) and table selection bytes. See Figure 1.

Table 01h mainly includes EEPROM (PW1 level access authority) and some alarm and early warning status bytes.

Table 02h is the multi-function area, including configuration registers, proportional adjustment and offset memory, passwords, interrupt registers, and various control bytes.

Table 03h is the user EEPROM area of ​​key data, protected by PW2 encryption.

Table 04h contains a temperature index look-up table (LUT) for controlling the modulation voltage. The modulation LUT can be set in 2 ° C steps from -40 ° C to + 102 ° C. Access to these registers is protected by PW2 encryption.

Table 05h contains another LUT that allows the APC setpoint to be adjusted as a function of temperature for tracking error (TE) compensation. TE LUT has 36 items and can set APC at intervals of 4 ° C from -40 ° C to + 100 ° C. Access to this register is protected by PW2 encryption.

Table 06h contains a MON4 index LUT for controlling the M4DAC voltage. The M4DAC LUT has 32 items and can be configured as a 32-item LUT or two 16-item LUTs. When configured as a 32-item LUT, each item corresponds to a step size of 1/32 of full scale. When configured as two 16-item LUTs, the first 16 items and the last 16 items correspond to 1/16 of full scale. Both 16 items are selected by independent configuration bits. Access to this register is protected by PW2 encryption.

Figure 1. DS1865 memory.
Figure 1. DS1865 memory

Register Reference Values ​​The following table gives simple reference values ​​for low-level memory, Table 01h and Table 02h. For a description of each bit function, please refer to the corresponding register in the DS1865 data sheet. Tables 03h, 04h, 05h and 08h do not require separate reference values ​​and are not listed here. (Please refer to the data sheet for details of these tables.)

Note: RSVD is the abbreviation of "Reserved".

Low-level memory
TEMP ALARM HI
TEMP WARN HI 		00h, 04h S 26 25 twenty four twenty three twenty two twenty one 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 twenty four twenty three twenty two twenty one 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 twenty four twenty three twenty two twenty one 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 twenty four twenty three twenty two twenty one 20
PW2 EE 30h-5Fh EE EE EE EE EE EE EE EE
TEMP VALUE 60h S 26 25 twenty four twenty three twenty two twenty one 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 twenty four twenty three twenty two twenty one 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 twenty four twenty three twenty two twenty one 20
TABLE SELECT 7Fh 27 26 25 twenty four twenty three twenty two twenty one 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 twenty four twenty three twenty two twenty one 20
MOD DAC 82h 27 26 25 twenty four twenty three twenty two twenty one 20
APC DAC 83h 27 26 25 twenty four twenty three twenty two twenty one 20
V INDEX 84h 27 26 25 twenty four twenty three twenty two twenty one 20
M4DAC 85h 27 26 25 twenty four twenty three twenty two twenty one 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 twenty four twenty three twenty two twenty one 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 twenty four twenty three twenty two twenty one 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 twenty four twenty three twenty two
RESERVED AC-ADh 0 0 0 0 0 0 0 0
TEMP OFFSET AEh S 28 27 26 25 twenty four twenty three twenty two
AFh twenty one 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 twenty four twenty three twenty two twenty one 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 twenty four twenty three twenty two twenty one 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 twenty four twenty three twenty two twenty one 20
LTXP BDh 27 26 25 twenty four twenty three twenty two twenty one 20
HBIAS BEh 27 26 25 twenty four twenty three twenty two twenty one 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 twenty four twenty three twenty two twenty one 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 twenty four twenty three twenty two twenty one 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 twenty four twenty three twenty two twenty one 20
RESERVED FD-FEh 0 0 0 0 0 0 0 0

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