DS1865 Quick Reference Guide

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

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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