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| 型号： | 71M6545-IGTR/F |
| 厂商： | Maxim Integrated |
| 文件页数： | 22/133页 |
| 文件大小： | 0K |
| 描述： | IC ENERGY METER 3PHASE 64LQFP |
| 标准包装： | 1,500 |
| 系列： | * |
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71M6545/71M6545H Data Sheet
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Shunt signal pre-amplifier
22-bit 2nd Order Sigma-Delta ADC Converter with precision bandgap reference (chopping amplifier)
Temperature sensor (for digitally compensating VREF)
Fuse system containing part-specific information
During an ordinary multiplexer cycle, the 71M6545/H internally determines which other channels are
enabled with MUX_DIV[3:0] (I/O RAM 0x2100[7:4]) . At the same time, it decimates the modulator output
from the 71M6xx3 Isolated Sensors. Each result is written to CE RAM during one of its CE access time
slots.
2.2.8.2 Communication between 71M6545/H and 71M6xx3 Isolated Sensor
The ADC of the 71M6xx3 derives its timing from the power pulses generated by the 71M6545/H and as a
result, operates its ADC slaved to the frequency of the power pulses. The generation of power pulses, as
well as the communication protocol between the 71M6545/H and 71M6xx3 Isolated Sensor, is automatic and
transparent to the user. Details are not covered in this data sheet.
2.2.8.3 Control of the 71M6xx3 Isolated Sensor
The 71M6545/H can read or write certain types of information from each 71M6xx3 remote sensor.
The data to be read is selected by a combination of the RCMD[4:0] and TMUXRn[2:0] . To perform a read
transaction from one of the 71M6xx3 devices, the MPU first writes the TMUXRn[2:0] field (where n = 2, 4, 6,
located at I/O RAM 0x270A[2:0] , 0x270A[6:4] and 0x2709[2:0] , respectively). Next, the MPU writes
RCMD[4:0] ( SFR 0xFC[4:0] ) with the desired command and phase selection. When the RCMD[4:2] bits
have cleared to zero, the transaction has been completed and the requested data is available in
RMT_RD[15:0] ( I/O RAM 0x2602[7:0] is the MSB and 0x2603[7:0] is the LSB). The read parity error bit,
PERR_RD (SFR 0xFC[6]) is also updated during the transaction. If the MPU writes to RCMD[4:0] before a
previously initiated read transaction is completed, the command is ignored. Therefore, the MPU must wait
for RCMD[4:2] =0 before proceeding to issue the next remote sensor read command.
The RCMD[4:0] field is divided into two sub-fields, COMMAND=RCMD[4:2] and PHASE=RCMD[1:0] , as
shown in Table 4 .
Table 4. RCMD[4:0] Bits
Command Phase Selector Associated TMUXRn
RCMD[4:2] RCMD[1:0] Control Field
000 Invalid 00 Invalid ---
001 Command 1 01 IADC 2 -IADC3 TMUXR 2 [2:0]
010 Command 2 10 IADC 4 -IADC5 TMUXR 4 [2:0]
011 Reserved 11 IADC 6 -IADC7 TMUXR 6 [2:0]
100 Reserved
101 Invalid
110 Reserved
111 Reserved
Notes:
1. Only two codes of RCMD[4:2] ( SFR 0xFC[4:2] ) are relevant for normal
operation. These are RCMD[4:2] = 001 and 010. Codes 000 and 101
are invalid and will be ignored if used. The remaining codes are
reserved and must not be used.
2. For the RCMD[1:0] control field, codes 01, 10 and 11 are valid and 00
is invalid and must not be used.
3. The specific phase (A, B or C) associated with each TMUXRn[2:0]
field, is determined by how the IADCn input pins are connected in the
meter design.
Table 5 shows the allowable combinations of values in RCMD[4:2] and TMUXRn[2:0] , and the
corresponding data type and format sent back by the 71M6xx3 remote sensor and how the data is stored
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相关代理商/技术参数 |
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|---|---|
| 71M6545T-IGT/F | 制造商:Maxim Integrated Products 功能描述:METROLOGY PROCESSORS - Rail/Tube |
| 71M6545T-IGTR/F | 制造商:Maxim Integrated Products 功能描述:3-PHASE AFE, 32KB FLASH, PRES TEMP SENSOR - Tape and Reel |
| 71M6601 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:On-Chip Temperature Sensor Enables Localized Digital Temperature On-Chip Power Monitoring |
| 71M6601-IF | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:On-Chip Temperature Sensor Enables Localized Digital Temperature On-Chip Power Monitoring |
| 71M6601-IL | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:On-Chip Temperature Sensor Enables Localized Digital Temperature On-Chip Power Monitoring |
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