User's Manual l TQMaRZG2x UM 0100 l © 2021, TQ-Systems GmbH
Page 23
3.4.8
I
2
C
The RZ/G2x offers up to seven I
2
C interfaces. The IIC_DVFS is used on the TQMaRZG2x. There are 2.2 kΩ pull-ups on the IIC_DVFS
interface. If further I
2
C devices are connected to the I
2
C bus on the carrier board, the maximum capacitive bus load according to
the I
2
C standard must be observed. If necessary, additional pull-ups must be provided on the carrier board.
The following figure shows the I
2
C bus structure on the TQMaRZG2x.
RZ/G2x
RTC
EEPROM
TSE
Temp
Sensor
IIC_DVFS
(AL1 / AL2)
1.8 V
Level shifter
1.8
V ↔
3.3 V
IIC_DVFS
3.3 V
Board
Controller
NP
Connector
Figure 10: Block diagram I
2
C bus
The following table shows the addresses of all I
2
C devices:
Table 22:
I2C1 device addresses
Device
Function
7-bit address
Remark
24LC64T
EEPROM
0x50 / 101 0000b
For general usage
MKL04Z16
System Controller
0x11 / 001 0001b
Should not be altered
PCF85063A
RTC
0x51 / 101 0001b
Assembly option
SE97BTP
Temperature sensor
0x1F / 001 1111b
Temperature
EEPROM
0x57 / 101 0111b
Normal Mode
EEPROM
0x37 / 011 0111b
Protected Mode
SE050
Secure Element
0x48 / 100 1000b
Assembly option
Depending on the multiplexing, the following signals are primarily available.
Table 23:
I
2
C signals
Signal
TQMaRZG2x
Power group
Remark
IIC_DVFS_SDA
X1-A54
3.3 V
2.2 kΩ pull-up on TQMaRZG2x
IIC_DVFS_SCL
X1-A55
2.2 kΩ pull-up on TQMaRZG2x
I2C4_SDA
X1-B48
1.8 V
–
I2C4_SCL
X1-B49
–
I2C6_SDA
X1-A69
3.3 V
–
I2C6_SCL
X1-A73
–
3.4.9
Interrupt Controller
The RZ/G2x provides an interrupt controller with six IRQ, as well as an NMI interrupt.
The NMI (INTC) works at 1.8 V and is routed to X2-A50.
