6. Pin Descriptions: Si4734/35-GM
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| FMI |
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RFGND |
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| AMI |
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| RST |
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| SEN |
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NC | GPO1 |
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20 |
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| 18 | |
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GND
PAD
7 |
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| 9 |
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SCLK |
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GPO3/DCLK | DFS |
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17 | 16 |
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| 15 | DOUT |
| 14 | LOUT |
| 13 | ROUT |
| 12 | GND |
10 | 11 | VDD |
VIO |
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Pin Number(s) | Name | Description | ||||||
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1, 20 |
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| NC | No connect. Leave floating. | ||||
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2 |
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| FMI | FM RF inputs. | ||||
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3 | RFGND | RF ground. Connect to ground plane on PCB. | ||||||
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4 |
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| AMI | AM/SW/LW RF input. | ||||
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5 |
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| Device reset (active low) input. |
RST | ||||||||
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6 |
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| Serial enable input (active low). |
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7 | SCLK | Serial clock input. | ||||||
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8 | SDIO | Serial data input/output. | ||||||
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9 | RCLK | External reference oscillator input. | ||||||
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10 |
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| VIO | I/O supply voltage. | ||||
11 |
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| VDD | Supply voltage. May be connected directly to battery. | ||||
12, GND PAD | GND | Ground. Connect to ground plane on PCB. | ||||||
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13 | ROUT | Right audio line output in analog output mode. | ||||||
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14 | LOUT | Left audio line output in analog output mode. | ||||||
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15 | DOUT | Digital output data in digital output mode. | ||||||
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16 |
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| DFS | Digital frame synchronization input in digital output mode. | ||||
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17 | GPO3/DCLK | General purpose output, crystal oscillator, or digital bit synchronous clock input | ||||||
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| in digital output mode. |
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18 |
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| General purpose output or interrupt pin. |
GPO2/INT | ||||||||
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19 | GPO1 | General purpose output. | ||||||
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30 | Rev. 1.0 |
