Note
On HiFive Unmatched Version 2 boards, the silk screen which describes the orientation of
the Boot Mode Select switch is incorrect. Version 2 can be identified from the Board
Assembly Number Label on the board, HF105-ASSY-2A0, where number 2 indicates Ver-
sion 2. Please carefully match the orientation shown in Figure 4 to ensure that the
Unmatched Board boots from the SD card.
Figure 4:
Boot Mode Select switch with default setting (MSEL = 4b'1011)
Table 2:
Boot Mode Select Configuration Settings
MSEL[3:0]
FSBL Location
Access Method
SPI Width
4b'0101
QSPI0 Flash
Memory mapped
X1
4b'0110
QSPI0 Flash
Memory mapped
X4
4b'0111
QSPI1 Flash
Memory mapped
X4
4b'1000
QSPI1 SD Card
Bit-banged
X1
4b'1001
QSPI2 Flash
Bit-banged
X1
4b'1010
QSPI0 Flash
Memory mapped
X4
4b'1011 (Default)
QSPI2 SD Card
Bit-banged
X1
4b'1100
QSPI1 Flash
Bit-banged
X1
4b'1101
QSPI1 Flash
Memory mapped
X4
4b'1110
QSPI0 Flash
Bit-banged
X1
4b'1111
QSPI0 Flash
Memory mapped
X4
3 Board Setup
HiFive Unmatched Getting Started Guide
© SiFive, Inc.
Page 9
