78M6612 Hardware Design Guidelines
AN_6612_007
14
Rev 2
5.6 Driving External Loads
Connect external loads to the digital outputs (DIO pins) as shown in Figure 11.
V3P3
DGND
V3P3
DGND
NOT RECOMMENDED
RECOMMENDED
Figure 12: Connecting an External Load to a Digital Output
5.7 Connecting I
2
C EEPROMs
Connect I
2
C EEPROMs or other I
2
C compatible devices to DIO pins DIO4 and DIO5 as shown in Figure
12. Add pull-up resistors of roughly 10 k
Ω
to V3P3 for both the SCL and SDA signals. The I/O RAM
register
DIO_EEX
must be set to 01 to convert the DIO pins DIO4 and DIO5 to SCL and SDA I
2
C
operational mode.
.
Figure 13: I
2
C EEPROM Connection
DIO4
DIO5
78M6612
EEPROM
SCL
SDA
V3P3
10 k
Ω
10 k
Ω
DIO4
DIO5
EEPROM
SCL
SDA
