Preliminary User's Manual l TQMa65xx UM 0001 l © 2021, TQ-Systems GmbH
Page 13
3.2.1.2
MCU Boot Mode Selection
The MCU_BOOTMODE[9:0] pins have to be configured on the carrier board (e.g., MBa65xx).
Table 5:
MCU_BOOTMODE Pin Mapping
9
8
7
6
5
4
3
2
1
0
1.8 V
MMC/SD
POST
Reserved
Ref Clock
Table 6:
PLL Reference Clock Selection
MCU_BOOTMODE Pins
Ref Clock (MHz)
2
1
0
0
0
0
19.2
0
0
1
20
0
1
0
24
0
1
1
25
1
0
0
26
1
0
1
27
1
1
0
Reserved
1
1
1
No PLL configuration (slow speed backup)
Table 7:
POST Selection
MCU_BOOTMODE Pins
POST Select
8
7
6
5
0
0
0
0
POST bypass
X
X
X
1
Enable POST DMSC, MCU LBIST Parallel
X
X
1
X
POST DMSC LBIST Enable
X
1
X
X
POST MCU LBIST Enable
1
X
X
X
POST PBIST Enable
Table 8:
1.8V LDO Configuration
MCU_BOOTMODE Pin
1.8V MMC/SD
9
0
MMCSD0 connected to 1.8V LDO
1
MMCSD1 connected to 1.8V LDO
1:
Only on safety-enabled devices. Refer to device Datasheet for device nomenclature.
2:
Always set to 0s (via pulldowns to VSS).
