Datasheet

DS1886
SFP and PON ONU Controller
with Digital LDD Interface
31Maxim Integrated
3-Wire Power-On Reset
The DS1886 detects whether a power-on reset has
occured on the slave 3-wire device. This is done using
the flowchart shown in Figure 15.
Figure 15. MAX3710 Brownout Detection Flowchart
WRITE_CONTROL
RXCTRL1, RXCTRL2,
SET_CML, SET_LOS,
TXCTRL1, TXCTRL2,
TXCTRL3, TXCTRL4
READ TXSTAT1
WRITE_LUT REGISTERS
TXCTRL5,
IMODMAX, IBIASMAX,
SET_IMOD, SET_IBIAS,
MODINC, BIASINC,
SET_2XAPC
STEADY
STATE
FAULT WAIT
STATE
1, 2
TXF = 1?
WRITE TXCTRL6
YES
TXF = 1?
YES
TEMP
CONVERSION
COMPLETE?
NO
TXSTAT1 = FFh?
NO
NO
NO
WRITE_LUT REGISTERS
TXCTRL5,
IMODMAX, IBIASMAX,
SET_IMOD, SET_IBIAS,
MODINC, BIASINC,
SET_2XAPC
NOTE 1: FAULT WAIT STATE HAS ACCESS TO MAX3710 IN MANUAL MODE.
NOTE 2: MON_SEL BIT IS TOGGLED AS NEEDED TO KEEP THE TXP/TXB MONITORS CORRECT.
YES
YES
WRITE TXCTRL6TXF = 1?
NO
YES