71M6533 Datasheet, PDF (49/132 Pages) Teridian Semiconductor Corporation – Energy Meter IC

FDS_6533_6534_004
71M6533/G/H and 71M6534/H Data Sheet
EECTRL Byte Written
Write -- No HiZ
SCLK (output)
CNT Cycles (6 shown)
INT5
SDATA (output)
D7
D6
D5
D4
D3
D2
SDATA output Z
(LoZ)
BUSY (bit)
Figure 10: 3-wire Interface. Write Command, HiZ=0.
EECTRL Byte Written
Write -- With HiZ
SCLK (output)
CNT Cycles (6 shown)
INT5
SDATA (output)
D7
D6
D5
D4
D3
D2
SDATA output Z
(LoZ)
(HiZ)
BUSY (bit)
Figure 11: 3-wire Interface. Write Command, HiZ=1
EECTRL Byte Written
READ
SCLK (output)
CNT Cycles (8 shown)
INT5
SDATA (input)
D7
D6
D5
D4
D3
D2
D1
D0
SDATA output Z
(HiZ)
BUSY (bit)
Figure 12: 3-wire Interface. Read Command.
EECTRL Byte Written
Write -- No HiZ
SCLK (output)
INT5 not issued
EECTRL Byte Written
CNT Cycles (0 shown)
Write -- HiZ
SCLK (output)
INT5 not issued
CNT Cycles (0 shown)
SDATA (output)
D7
SDATA (output)
SDATA output Z
(LoZ)
SDATA output Z
(HiZ)
BUSY (bit)
BUSY (bit)
Figure 13: 3-Wire Interface. Write Command when CNT=0
EECTRL Byte Written
Write -- With HiZ and WFR
SCLK (output)
CNT Cycles (6 shown)
INT5
SDATA (out/in)
SDATA output Z
D7
D6
D5
D4
D3
D2
F⁽r^Fo^rom^m 6⁶⁵5²3⁰X⁾
(LoZ)
BUSY
(From EEPROM)
(HiZ)
READY
BUSY (bit)
Figure 14: 3-wire Interface. Write Command when HiZ=1 and WFR=1
Rev 2
49