Datasheet

71M6521DE/DH/FE Data Sheet
Rev 3 Page: 45 of 107
Figure 11: 3-Wire Interface. Read Command.
Figure 12: 3-Wire Interface. Write Command when CNT=0
Figure 13: 3-Wire Interface. Write Command when HiZ=1 and WFR=1.
CNT Cycles (8 shown)
READ
D0D1D2D3D4D5
INT5
D6D7
EECTRL Byte Written
SCLK (output)
BUSY (bit)
SDATA (input)
SDATA output Z
(HiZ)
CNT Cycles (0 shown)
Write -- No HiZ
D7
INT5 not issued
CNT Cycles (0 shown)
Write -- HiZ
INT5 not issued
EECTRL Byte Written EECTRL Byte Written
SCLK (output)
BUSY (bit)
SDATA (output)
SCLK (output)
BUSY (bit)
SDATA (output)
(HiZ)
SDATA output ZSDATA output Z
(LoZ)
CNT Cycles (6 shown)
Write -- With HiZ and WFR
EECTRL Byte Written
SCLK (output)
BUSY (bit)
SDATA (out/in)
D2D3D4D5D6D7
BUSY READY
(From EEPROM)
INT5
(From 6520)
SDATA output Z
(HiZ)(LoZ)