SE868SY-D Hardware Design Guide
1VV0301705 Rev. 5
Page 19 of 44
2021-12-15
Not Subject to NDA
5.
DIGITAL SECTION
Logic Levels
Table 11: Logic Levels Minimum and Maximum
Table 12: I/O Driving Capability
Communication Ports
5.2.1.
Communication Interfaces to the Host MCU (HIF)
The SE868SY-D features three different Host Interfaces (HIF) for communicating with the
host MCU, which can be selected using the Host Interface Selection pin (See section 5.2.2
Host Interface Selection):
•
HIF_UART: serial interface, supporting speeds up to 10Mbps.
Function
Pin on SE868SY-D
HIF_UART_TX
10
HIF_UART_RX
11
HIF_UART_CTS
23
HIF_UART_RTScon
24
Parameter
Min
Max
Absolute Maximum Ratings
–
Not Functional
Input level on any digital pin (CMOS
1.8) with respect to ground
-0.3V
2.2 V
Operating Range - Interface levels (1.8V CMOS)
Input high level
0.7*VDD
VDD
Input low level
0 V
0.3*VDD
Output high level
VDD-0.45 V
VDD
Output low level
0 V
0.45 V
Parameter
AVG
Current characteristics for digital pins
Output Current
3 mA
Input Current
3 mA