DS_6613_018

78M6613 Data Sheet

Rev 2

3

4.5 Timing Specifications............................................................................................................24

4.5.1 RAM and Flash Memory............................................................................................24

4.5.2 RESET......................................................................................................................24

4.5.3 Typical Performance Data.........................................................................................25

5

Packaging ....................................................................................................................................26

5.1 Pinout ...................................................................................................................................26

5.2 Package Outline (QFN 32)....................................................................................................27

5.3 Recommended PCB Land Pattern for the QFN-32 Package ................................................. 28

6

Pin Descriptions..........................................................................................................................29

6.1 Power/Ground Pins...............................................................................................................29

6.2 Analog Pins ..........................................................................................................................29

6.3 Digital Pins ...........................................................................................................................30

7

I/O Equivalent Circuits ................................................................................................................31

8

Ordering Information...................................................................................................................32

9

Contact Information ....................................................................................................................32

Revision History..................................................................................................................................33

Fig

ures

Figure 1: IC Functional Block Diagram .................................................................................................... 4

Figure 2: AFE Block Diagram .................................................................................................................. 7

Figure 3: Connecting an External Load to DIO Pins............................................................................... 10

Figure 4: Voltage. Current, Momentary and Accumulated Energy.......................................................... 11

Figure 5: MPU/CE Data Flow ................................................................................................................ 12

Figure 6: MPU/CE Communication........................................................................................................ 13

Figure 7: Resistive Voltage Divider........................................................................................................ 14

Figure 8: Resistive Current Shunt.......................................................................................................... 14

Figure 9: Current Transformer ............................................................................................................... 14

Figure 10: Connections for the RX Pin................................................................................................... 16

Figure 11: 78M6613 External Reset Behavior........................................................................................ 17

Figure 12: MAX810S Connections to the 78M6613................................................................................ 17

Figure 13: Reset Generator Based On TL431 Shunt Regulator.............................................................. 18

Figure 14: External Components for the Emulator Interface .................................................................. 18

Figure 15: Wh Accuracy, 10 mA to 20 A at 120 V/60 Hz and Room Temperature Using a 4 mΩ

Current Shunt....................................................................................................................... 25

Figure 16: Typical Measurement Accuracy over Temperature Relative to 25°C..................................... 25

Figure 17: 32-Pin QFN Pinout ............................................................................................................... 26

Figure 18: Package Outline (QFN 32).................................................................................................... 27

Figure 19: Recommended PCB Land Pattern Dimensions..................................................................... 28

Figure 20: I/O Equivalent Circuits.......................................................................................................... 31

Table

Table 1: Inputs Selected in Regular and Alternate Multiplexer Cycles...................................................... 6