User's Manual l TQMLS10xxA UM 0105 l © 2022, TQ-Systems GmbH
Page 17
4.13
I
2
C bus
The I
2
C devices on the TQMLS10xxA are connected to the I2C1 bus.
LS10xxA
RTC
CPLD
EEPROM
Board
Controller
Temp. Sensor
+
EEPROM
IIC1
Optional
external
Pull-Ups
required
External
Devices
DVDD ↔
3.3 V (LDO)
Level Shifter
3.3 V (LDO)
↔ VCC
3V3
IIC1_MOD
I2C_BRD
L-ASC10
Level Shifter
24LC256T
PCF95063
SE97BTP
Temp. Sensor
+
EEPROM
SE97BTP
I2C3_MCU
IIC1
Figure 16: Block diagram I
2
C bus 1 structure on TQMLS10xxA
4.7 k
Ω
Pull-Ups at the I
2
C bus are assembled on the TQMLS10xxA. More devices can be connected to the bus but then additional
external Pull-Ups may be required on account of the higher capacitive load.
Table 7:
I
2
C addresses
Device
Function
7-bit address
Remark
Connected to Board Controller, not accessible
L-ASC10
Voltage Monitoring
0x60 / 110 0000b
–
MachX03
CPLD
(n.a.)
–
SE97B
Temperature sensor
0x1B / 001 1011b
Access to temperature registers
EEPROM
0x53 / 101 0011b
R/W access in Normal Mode
EEPROM
0x33 / 011 0011b
R/W access in Protected Mode
Connected to LS10xxA, accessible
24LC256
EEPROM
0x57 / 101 0111b
–
STM32
Board Controller
0x11 / 001 0001b
Should not be altered
PCF85063A
RTC
0x51 / 101 0001b
–
SE97B
Temperature sensor
0x18 / 001 1000b
Access to temperature registers
EEPROM
0x50 / 101 0000b
R/W access in Normal Mode
EEPROM
0x30 / 011 0000b
R/W access in Protected Mode
4.14
TQMLS10xxA interfaces
4.14.1
Pin multiplexing
When using the processor signals the multiple pin configurations by different processor-internal function units must be taken
note of. The pin assignment listed in Table 8 to Table 11 refer to the corresponding standard BSPs of TQ-Systems GmbH
in combination with the Starterkit MBLS10xxA. For standard BSPs, see 1.9.
Attention: Destruction or malfunction
Depending on the configuration many CPU pins can provide several different functions.
Please take note of the information concerning the configuration of these pins in (1), before
integration or start-up of your carrier board / Starterkit.
