Silicon Laboratories Si47 Series Programming Manual page 175

5.4.1. WB Receiver Commands
Command 0x01. POWER_UP
Initiates the boot process to move the device from powerdown to powerup mode. The boot can occur from internal
device memory or a system controller downloaded patch. To confirm that the patch is compatible with the internal
device library revision, the library revision should be confirmed by issuing the POWER_UP command with FUNC =
15 (query library ID). The device returns the response, including the library revision, and then moves into
powerdown mode. The device can then be placed in powerup mode by issuing the POWER_UP command with
FUNC = 3 (WB Receive) and the patch may be applied.
The POWER_UP command configures the state of ROUT (pin 13), LOUT (pin 14) for analog audio mode. For
Si4743 component 2A or higher, the POWER_UP command also configures the state of GPO3/DCLK (pin 19),
DFS (pin 18), and DOUT (pin 17) for digital audio mode. The command configures GPO2/INT~ interrupts
(GPO2OEN) and CTS interrupts (CTSIEN). If both are enabled, GPO2/IRQ is driven high during normal operation
and low for a minimum of 1 μs during the interrupt. The CTSIEN bit is duplicated in the GPO_IEN property. The
command is complete when the CTS bit (and optional interrupt) is set.
To change function (e.g., WB RX to FM RX), issue POWER_DOWN command to stop current function; then, issue
POWER_UP to start new function.
Available in: All
Command Arguments: Two
Response Bytes: None (FUNC=3), Seven (FUNC=15)
Command
Bit D7
0
CMD
CTSIEN
ARG1
ARG2
D6 D5
0 0
GPO2OEN PATCH XOSCEN
Rev. 0.8
D4 D3 D2
0 0 0
OPMODE[7:0]
AN332
D1 D0
0 1
FUNC[3:0]
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