71M6521BE Datasheet, PDF (44/97 Pages) Teridian Semiconductor Corporation – Energy Meter IC

EECTRL Byte Written
READ
SCLK (output)
SDATA (input)
SDATA output Z
BUSY (bit)
CNT Cycles (8 shown)
71M6521BE
Energy Meter IC
DATA SHEET
JANUARY 2008
INT5
D7
D6
D5
D4
D3
D2
D1
D0
(HiZ)
Figure 11: 3-Wire Interface. Read Command.
EECTRL Byte Written
Write -- No HiZ
SCLK (output)
SDATA (output)
SDATA output Z
BUSY (bit)
INT5 not issued
EECTRL Byte Written
CNT Cycles (0 shown)
Write -- HiZ
SCLK (output)
D7
SDATA (output)
(LoZ)
SDATA output Z
BUSY (bit)
INT5 not issued
CNT Cycles (0 shown)
(HiZ)
EECTRL Byte Written
Write -- With HiZ and WFR
SCLK (output)
SDATA (out/in)
SDATA output Z
BUSY (bit)
Figure 12: 3-Wire Interface. Write Command when CNT=0
CNT Cycles (6 shown)
INT5
D7
D6
D5
D4
D3
D2
(From 6520)
(LoZ)
BUSY
(From EEPROM)
(HiZ)
READY
Figure 13: 3-Wire Interface. Write Command when HiZ=1 and WFR=1.
Page: 44 of 97
© 2005-2008 TERIDIAN Semiconductor Corporation
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