71M6521BE
Energy Meter IC
DATA SHEET
JANUARY 2008
EECTRL Byte Written
INT5
CNT Cycles (8 shown)
READ
SCLK (output)
D7
D6
D5
D4
D3
D2
D1
D0
SDATA (input)
SDATA output Z
BUSY (bit)
(HiZ)
Figure 11: 3-Wire Interface. Read Command.
EECTRL Byte Written
EECTRL Byte Written
INT5 not issued
CNT Cycles (0 shown)
INT5 not issued
CNT Cycles (0 shown)
Write -- No HiZ
Write -- HiZ
SCLK (output)
SCLK (output)
D7
SDATA (output)
SDATA output Z
BUSY (bit)
SDATA (output)
SDATA output Z
BUSY (bit)
(LoZ)
(HiZ)
Figure 12: 3-Wire Interface. Write Command when CNT=0
EECTRL Byte Written
INT5
CNT Cycles (6 shown)
Write -- With HiZ and WFR
SCLK (output)
D7
D6
D5
D4
D3
D2
BUSY
READY
SDATA (out/in)
(From 6520)
(From EEPROM)
(LoZ)
(HiZ)
SDATA output Z
BUSY (bit)
Figure 13: 3-Wire Interface. Write Command when HiZ=1 and WFR=1.
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© 2005-2008 TERIDIAN Semiconductor Corporation
V1.0
TERIDIAN [ TERIDIAN SEMICONDUCTOR CORPORATION ]
