71m6521be Maxim Integrated Products, Inc., 71m6521be Datasheet - Page 43

• Manufacturer Part Number: 71m6521be
• Description: Energy Meter Ic
• Manufacturer: Maxim Integrated Products, Inc.

V1.0
Control
3-0
Bit
7
6
5
4
SDATA output Z
SDATA (output)
CNT[3:0]
SDATA output Z
SDATA (output)
EECTRL Byte Written
Name
SCLK (output)
BUSY
EECTRL Byte Written
WFR
SCLK (output)
HiZ
RD
Write -- With HiZ
Write -- No HiZ
BUSY (bit)
BUSY (bit)
Read/Write
W
W
W
W
R
Figure 10: 3-Wire Interface. Write Command, HiZ=1
Figure 9: 3-Wire Interface. Write Command, HiZ=0.
© 2005-2008 TERIDIAN Semiconductor Corporation
Table 57: EECTRL bits for 3-wire interface
D7
D7
Description
Wait for Ready. If this bit is set, the trailing edge of BUSY will be delayed
until a rising edge is seen on the data line. This bit can be used during the
last byte of a Write command to cause the INT5 interrupt to occur when the
EEPROM has finished its internal write sequence. This bit is ignored if
HiZ=0.
Asserted while serial data bus is busy. When the BUSY bit falls, an INT5
interrupt occurs.
Indicates that the SD signal is to be floated to high impedance immediately
after the last SCK rising edge.
Indicates that EEDATA is to be filled with data from EEPROM.
Specifies the number of clocks to be issued. Allowed values are 0 through
8. If RD=1, CNT bits of data will be read MSB first, and right justified into
the low order bits of EEDATA. If RD=0, CNT bits will be sent MSB first to
EEPROM, shifted out of EEDATA’s MSB. If CNT is zero, SDATA will
simply obey the HiZ bit.
D6
D6
CNT Cycles (6 shown)
CNT Cycles (6 shown)
(LoZ)
D5
(LoZ)
D5
D4
D4
D3
D3
D2
Energy Meter IC
D2
INT5
INT5
(HiZ)
71M6521BE
DATA SHEET
JANUARY 2008
Page: 43 of 97