71M6541D-IGT/F Maxim Integrated Products, 71M6541D-IGT/F Datasheet - Page 60

• Manufacturer Part Number: 71M6541D-IGT/F
• Description: PMIC Solutions Precision Energy Meter IC
• Manufacturer: Maxim Integrated Products
• Type: Metering SoCr

Specifications of 71M6541D-IGT/F

• Core: 8051
• Core Architecture: 8051
• Data Bus Width: 8 bit
• Data Ram Size: 3 KB
• Device Million Instructions Per Second: 5 MIPS
• Interface Type: I2C, ICE, SPI, UART
• Maximum Clock Frequency: 5 MHz
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Number Of Programmable I/os: 30
• Number Of Timers: 2
• On-chip Adc: 22 bit
• Operating Supply Voltage: 3 V to 3.6 V
• Package / Case: LQFP-64
• Processor Series: 8051
• Program Memory Size: 32 KB
• Program Memory Type: Flash
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

60
When driving LEDs, relay coils etc., the DIO pins should sink the current into GNDD (as
shown in
to the resistance of the internal switch that connects V3P3D to either V3P3SYS or VBAT. See
6.4.6 V3P3D Switch
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.
Note:
Resources are selectable only on SEGDIO2 through SEGDIO11 and the
PB pin. See
Value in DIO_Rn[2:0]
Figure 20,
Not recommended
HIGH-Z
Figure 20: Connecting an External Load to DIO Pins
HIGH
LOW
5
Table 48
© 2008–2011 Teridian Semiconductor Corporation
BROWNOUT
MISSION
LCD/SLEEP
right), not source it from V3P3D (as shown in
on page 143.
(71M6541D/F) and
DIO
V3P3SYS
V3P3D
GNDD
VBAT
Resource Selected for SEGDIOn or PB Pin
Low priority I/O interrupt (INT1)
Table 52
Recommended
HIGH-Z
HIGH
LOW
BROWNOUT
MISSION
LCD/SLEEP
(71M6542F).
DIO
V3P3SYS
VBAT
V3P3D
GNDD
Figure
20, left). This is due
v1.1