ds1878 Maxim Integrated Products, Inc., ds1878 Datasheet - Page 26

• Manufacturer Part Number: ds1878
• Description: Sfp+ Controller With Digital Ldd Interface
• Manufacturer: Maxim Integrated Products, Inc.

SFP+ Controller with Digital LDD Interface
Figure 18. 3-Wire State Machine
26
3-WIRE STATE MACHINE
YES
______________________________________________________________________________________
YES
CONTROL/STATUS
TXD_FLAG = = 1?
(SET MOD_FLAG)
WAIT FOR MOD
INITIALIZATION
MODINC = = 1?
(RESET FLAGS)
TXD_ext = = 0?
TXPOR = = 1?
TXPOR = = 1?
POR OR TXD
READ TXPOR
READ TXPOR
WRITE MOD
YES
YES
YES
(SET TXD_FLAG)
TXD_STANDBY
TXD = = 0?
YES
OR BIAS_MANUAL = 1?
APC_BINARY = = 0?
INCREMENT BIAS
WAIT FOR BIAS
BIASINC = = 1?
DIS3W = 1?
STANDBY
YES
YES
YES
OR MOD_FLAG = 1
TXD_FLAG = = 1?
YES
OR MOD_FLAG = 1?
TEMP_CONV = = 1?
CONTROL/STATUS
MANMODE = = 1?
TXD_FLAG = = 1?
AND DIS3W = 0
OR DIS3W = 1?
MODINC = = 1?
BIASINC = = 1?
UPDATE
YES
YES
YES
MODULATION
READ/WRITE
INCREMENT
MANMODE
YES