参数资料
型号: 71M6545-IGTR/F
厂商: Maxim Integrated
文件页数: 79/133页
文件大小: 0K
描述: IC ENERGY METER 3PHASE 64LQFP
标准包装: 1,500
系列: *
71M6545/71M6545H Data Sheet
4.6
Connecting I 2 C EEPROMs
I 2 C EEPROMs or other I 2 C compatible devices should be connected to the DIO pins DIO2 and DIO3, as
shown in Figure 29 .
Pull-up resistors of roughly 10 k ? to V3P3D should be used for both SDCK and SDATA signals. The
DIO_EEX ( I/O RAM 0x2456[7:6] ) field must be set to 01 in order to convert the DIO pins DIO2 and DIO3 to
I 2 C pins SCL and SDATA.
10 k Ω
DIO2
DIO3
V3P3D
10 k Ω
EEPROM
SDCK
SDATA
71M6545/H
Figure 29: I 2 C EEPROM Connection
4.7
Connecting Three-Wire EEPROMs
μWire EEPROMs and other compatible devices should be connected to the DIO pins DIO2 and DIO3, as
described in 2.5.11 EEPROM Interface on page 57 .
4.8
UART (TX/RX)
The UART0 RX pin should be pulled down by a 10 k ? resistor and additionally protected by a 100 pF
ceramic capacitor, as shown in Figure 30 .
71M6545/H
RX
TX
100 pF 10 k Ω
RX
TX
Figure 30: Connections for the UART
4.9
Connecting the Reset Pin
Even though a functional meter does not necessarily need a reset switch, it is useful to have a reset
pushbutton for prototyping as shown in Figure 31 , left side. The RESET signal may be sourced from
V3P3SYS.
For a production meter, the RESET pin should be protected by the external components shown in
Figure 31 , right side. R1 should be in the range of 100 ? and mounted as closely as possible to the IC.
Since the 71M6545/H generates its own power-on reset, a reset button or circuitry, as shown in Figure
31 , is only required for test units and prototypes.
v2
79
相关PDF资料
PDF描述
T95S224M035LZAL CAP TANT 0.22UF 35V 20% 1507
GBC12DCSN-S288 CONN EDGECARD 24POS .100 EXTEND
78M6612-M/F/P2 IC PWR MEASUREMENT AC 68SQFN
V48C28H75BL2 CONVERTER MOD DC/DC 28V 75W
ISL6613IRZ-T IC MOSFET DRVR SYNC BUCK 10-DFN
相关代理商/技术参数
参数描述
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