71m6545h-igtr/f Maxim Integrated Products, Inc., 71m6545h-igtr/f Datasheet - Page 23

• Manufacturer Part Number: 71m6545h-igtr/f
• Description: Metrology Processors
• Manufacturer: Maxim Integrated Products, Inc.

Notes:
PDS_6545_009
Table 5
corresponding data type and format sent back by the 71M6xx3 remote sensor and how the data is stored
in RMT_RD[15:8] and RMT_RD[7:0]. The MPU selects which of the three phases is read by asserting the
proper code in the RCMD[1:0] field, as shown in
With hardware and trim-related information on each connected 71M6xx3 Isolated Sensor available to the
71M6545/H, the MPU can implement temperature compensation of the energy measurement based on the
individual temperature characteristics of the 71M6xx3 Isolated Sensors. See
Compensation
Table 6
71M6xx3 Data Sheet for additional details.
v1.0
RCMD[4:2]
RCMD[4:0]
PERR_WR
PERR_RD
001
001
010
010
010
1.
2.
3.
4.
Name
TRIMT[7:0] is the VREF trim value for all 71M6xx3 devices. Note that the TRIMT[7:0] 8-bit value is formed
by RMT_RD[8] and RMT_RD[7:1]. See the 71M6xxx Data Sheet for the equations related to
and the corresponding temperature coefficient.
TRIMBGB[7:0] and TRIMBGD[7:0] are trim values used for characterizing the 71M6113 (0.5%) and 71M6203
(0.1%) over temperature. See the 71M6xxx Data sheet for the equations related to
TRIMBGD[7:0]
See
See
shows the allowable combinations of values in RCMD[4:2] and TMUXRn[2:0], and the
shows all I/O RAM registers used for control of the external 71M6xx3 Isolated Sensors. See the
2.5.6
2.5.8
TMUXRn[2:0]
for details.
SFR FC[6]
SFR FC[5]
00X
11X
00X
01X
10X
Address
71M6xx3 Temperature Sensor
71M6xx3 VCC Monitor
2. For the RCMD[1:0] control field, codes 01, 10 and 11 are valid and 00
3. The specific phase (A, B or C) associated with each TMUXRn[2:0]
FC[4:0]
SFR
are invalid and will be ignored if used. The remaining codes are
reserved and must not be used.
is invalid and must not be used.
field, is determined by how the IADCn input pins are connected in the
meter design.
and the corresponding temperature coefficients.
Table 6: I/O RAM Control Bits for Isolated Sensor
TRIMT[7:0]
(trim fuse for all 71M6xx3)
TRIMBGB[7:0] and
TRIMBGD[7:0]
(additional trim fuses for
71M6113 and 71M6203 only)
STEMP[10:0]
(sensed 71M6xx3 temperature)
VSENSE[7:0]
(sensed 71M6xx3 supply voltage)
VERSION[7:0]
(chip version)
© 2008–2011 Teridian Semiconductor Corporation
Default
Table 5: Remote Interface Read Commands
Read Operation
RST
0
0
Default
WAKE
on page 55.
0
0
on page 54.
Table
R/W Description
R/W
R/W
STEMP[10:8]=RMT_RD[10:8]
TRIMT[7]=RMT_RD[8]
(RMT_RD[15:
4.
When the MPU writes a non-zero value to RCMD,
the 71M6545/H issues a command to the cor-
responding isolated sensor selected with
RCMD[1:0]. When the command is complete, the
71M6545/H clears RCMD[4:2]. The command
code itself is in RCMD[4:2].
The 71M6545/H sets these bits to indicate that a
parity error on the isolated sensor has been de-
tected. Once set, the bits are remembered until
they are cleared by the MPU.
RMT_RD [15:8]
TRIMBGB[7:0]
VERSION[7:0]
All zeros
11] are sign extended)
4.5 Metrology Temperature
TRIMBGB[7:0]
TRIMT[6:0]=RMT_RD[7:1]
Data Sheet 71M6545/H
RMT_RD [7:0]
TRIMBGD[7:0]
VSENSE[7:0]
STEMP[7:0]
All zeros
TRIMT[7:0]
and
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