78M6612 Maxim, 78M6612 Datasheet - Page 24

• Manufacturer Part Number: 78M6612
• Description: The Teridian™ 78M6612 is a highly integrated, single-phase, power and energy measurement and monitoring system-on-chip (SoC) that includes a 32-bit compute engine (CE), an MPU core, RTC, and flash
• Manufacturer: Maxim

78M6612 Data Sheet
3.7 Connecting Three-Wire EEPROMs
µWire EEPROMs and other compatible devices should be connected to the DIO pins DIO4 and DIO5, as
shown in
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3.8 UART0 (TX0/RX0)
The UART0 RX0 pin should be pulled down by a 10 kΩ resistor and additionally protected by a 100 pF
ceramic capacitor, as shown in
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DIO5 connects to both the DI and DO pins of the three-wire device.
The CS pin must be connected to a vacant DIO pin of the 78M6618.
In order to prevent bus contention, a 10 kΩ to resistor is used to separate the DI and DO signals.
The CS and CLK pins should be pulled down with resistors to prevent operation of the three-wire
device on power-up, before the 78M6618 can establish a stable signal for CS and CLK.
The DIO_EEX register in I/O RAM must be set to 2 (b10) in order to convert the DIO pins DIO4 and
DIO5 to µWire pins.
Figure 13
The µ-Wire EEPROM interface is only functional when MPU_DIV[2:0] = 000.
and described below:
78M6612
Figure 13: Three-Wire EEPROM Connection
Figure
Figure 14: Connections for the RX0 Pin
78M6612
DIO4
DIO4
DIO5
DIO5
DIOn
DIOn
14.
RX0
TX0
10k Ω
10k Ω
100pF
100pF
10k Ω
10k Ω
10k Ω
10k Ω
V3P3D
V3P3D
EEPROM
EEPROM
DI
DI
DO
DO
CS
CS
SCLK
SCLK
TX
TX0
RX
RX0
DS_6612_001
Rev 2