User`s guide

Si47xx-EVB

Rev. 0.8 11

2.1.2. Microcontroller

Figure 5. MCU Block Diagram

The Si47xx EVB uses a Silicon Laboratories' C8051F342 microcontroller to control the Si47xx and to provide USB

connectivity from the host PC (via connector J79). The LED D1 illuminates to confirm that power is being properly

supplied to the C8051F342 and firmware has loaded. Push-button PB1 manually resets the C8051F342. The JTAG

connector J74 is used to program the C8051F342 at production time, and is not required thereafter.

MCU

C8051F342

Si47xx

SEN~

6 7 8

19 18 17

SCLK

SDIO

GPO1

GPO2

GPO3/

DCLK

RST~

MS_SENB

MS_RSTB

MS_SCLK

MS_SDIO

S_GPO3/DCLK

MS_GPIO2

SD_GPO1

Daughterboard

MD_GPIO3

TC_BCLK

(reserved for digital Rx )

Jumper

J41

MD_GPIO1

MD_GP4

J74

JTAG

PB1

Reset

J79

USB

Jumper

J65