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Si3480
5. Pin Descriptions
SDA
GND
VDD
RST
NC
1
2
3
4
5
15
14
13
12
11
PRIOCFG
ALTCFG
LED8
LED7
LED6
Table 6. Si3480 Pin Descriptions
Pin #
Pin Name
Pin Type
Pin Function
1
SDA
Open Collector Connect to Si3452 SDA and pull-up resistor.
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
GND
VDD
RST
NC
LED1
LED2
LED3
LED4
LED5
LED6
LED7
LED8
ALTCFG
PRIOCFG
POECFG
PWRCFG
LEDBANK
INT
Power
Power
Input
NC
Output
Output
Output
Output
Output
Output
Output
Output
Input
Input
Input
Input
Output
Input
Ground.
VDD.
Reset (a low will reset the Si3480).
Do not connect to this pin.
Pins LED1–LED4 work with Pin LEDBANK to drive the eight power
meter LEDs.
Pins LED5 – LED8 work with Pin LEDBANK to drive the eight port status
LEDs.
Low is Alternative A timing, High is Alternative B timing. See "3.1.4. Pin
ALTCFG" on page 6.
This pin sets the number of ports that are high priority. See "3.1.3. Pin
PRIOCFG" on page 6.
The pin sets the number of ports that are high power. See "3.1.2. Pin
POECFG" on page 6.
This pin sets the power provided. See "3.1.1. Pin PWRCFG" on page 6.
This pin determines which LED bank is being turned on.
Connect to Si3452 INT and pull up resistor.
8
20
SCL
Open Collector Connect to Si3452 SCL and pull up resistor.
Rev. 1.0
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