User's Manual l TQMaRZG2x UM 0100 l © 2021, TQ-Systems GmbH
Page 10
3.2
Boot source
The boot source is selected via the boot strapping pins of the RZ/G2x. All signals are routed to the TQMaRZG2x connectors.
After the release of PRESET# the configuration is read in. Depending on the boot device the RZ/G2x may read the data directly
from the boot device or the RZ/G2x boots from its on-chip boot ROM and loads the IPL into the internal RAM.
It is recommended to switch the boot strap pins to high impedance after read-in.
MDT[1:0]
RZ/G2x
Pin-Strapping
- Active driver during RESET#
- High-Z during normal operation
PORESET#
RST_IN#
System
Controller
MD[28:25]
MD[23:0]
BOOT_CFG#
Signal for
pin strapping driver
Connector
Figure 2:
Block diagram boot strapping
Table 6:
Boot source selection
X1-B67
X1-B66
X1-B64
X1-B63
Boot source
Boot interface
MD4
MD3
MD2
MD1
0
1
0
0
NOR flash
QSPI
1
1
0
1
eMMC
SDHI3
1
1
1
0
USB download
USB2_CH0
1
1
1
1
SCIF download
SCIF2
Note: Field software updates
When designing a carrier board, it is recommended to include an interface
for software updates in the field.
