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71M6541D/F/G Datasheet(PDF) 60 Page - Maxim Integrated Products

Part # 71M6541D/F/G
Description  Energy Meter ICs
PDF  166 Pages
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Manufacturer  MAXIM [Maxim Integrated Products]
Direct Link  https://www.maximintegrated.com/en.html
Logo MAXIM - Maxim Integrated Products

71M6541D/F/G Datasheet(HTML) 60 Page - Maxim Integrated Products

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71M6541D/F/G and 71M6542F/G Data Sheet
60
Rev 5
Table 47: Selectable Resources using the DIO_Rn[2:0] Bits
Value in DIO_Rn[2:0]
Resource Selected for SEGDIOn or PB Pin
0
None
1
Reserved
2
T0 (counter0 clock)
3
T1 (counter1 clock)
4
High priority I/O interrupt (INT0)
5
Low priority I/O interrupt (INT1)
Note:
Resources are selectable only on SEGDIO2 through SEGDIO11 and the
PB pin. See Table 48 (71M6541D/F/G) and Table 52 (71M6542F/G).
When driving LEDs, relay coils etc., the DIO pins should sink the current into GNDD (as
shown in Figure 20, right), not source it from V3P3D (as shown in Figure 20, left). This is due
to the resistance of the internal switch that connects V3P3D to either V3P3SYS or VBAT. See
6.4.6 V3P3D Switch on page 144.
Sourcing current in or out of DIO pins other than those dedicated for wake functions, for
example with pull-up or pull-down resistors, must be avoided. Violating this rule leads to
increased quiescent current in sleep and LCD modes.
Figure 20: Connecting an External Load to DIO Pins
V3P3SYS
VBAT
V3P3D
DIO
GNDD
MISSION
BROWNOUT
LCD/SLEEP
LOW
HIGH
HIGH-Z
V3P3SYS
VBAT
V3P3D
DIO
GNDD
MISSION
BROWNOUT
LCD/SLEEP
LOW
HIGH
HIGH-Z
Not recommended
Recommended



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