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User's Manual l MBLS1028A UM 0100 l © 2020, TQ-Systems GmbH
Page 21
4.3.7
mikroBUS™
The MBLS1028A provides a mikroBUS™ for system extensions. The I2C5 bus is used at the mikroBUS™.
mikroBUS™ modules require 3.3 V and 5 V, which are provided by the MBLS1028A. PTC fuses limit the current load at 750 mA.
SPI and UART interfaces are connected via a switch in order to use them on headers or to be able to disconnect the mikroBUS™.
No maximum values are specified for the power consumption. Since these are low-power modules, the current consumption is
limited to 500 mA per supply rail.
The following table shows the signals of mikroBUS™ connectors X32 and X33.
Table 17:
Pinout mikroBUS™ connectors X32, X33
X33
X32
Remark
Signal
Name
Pin
Pin
Name
Signal
Remark
10 kΩ to DGND
optional 10 kΩ to 3.3 V
0 V
AN
1
1
PWM
Mikro_Module_PWM
–
–
Mikro_Module_RST#
RST
2
2
INT
Mikro_Module_INT
–
–
SPI3_PCS0_MUX_B
CS
3
3
RX
UART2_SOUT_MUX_B
–
–
SPI3_SCK_MUX_B
SCK
4
4
TX
UART2_SIN_MUX_B
–
–
SPI3_SIN_MUX_B
MISO
5
5
SCL
IIC5_SCL_MUX_B
–
–
SPI3_SOUT_MUX_B
MOSI
6
6
SDA
IIC5_SDA_MUX_B
–
750 mA PTC fuse
V_3V3
+3.3V
7
7
+5V
V_5V0_SW
750 mA PTC fuse
–
DGND
GND
8
8
GND
DGND
–