RoyalTek REB-4315 - Manual (Page 10)

RoyalTek Confidential
9
REB-4315 Operational Manual
9 Interface document
Top View
Pin defined:
Pin
No.
Name
Input/
Output
Description Characteristics
1 NC Non connect
2 NC Non connect
3 PPS Output
TM Time mark output.
Output pulse timing.
Vol Max：0.4v
Voh Min：1.35v
(CMOS I/O run from 1.8v)
4 TX Output UART data transmit.
Vol Max：0.4v
Voh Min：1.35v
(CMOS I/O run from 1.8v)
5 RX Input UART data receive.
Vil ：-0.4v~0.45v
Vih ：1.26v~3.6v
(CMOS I/O run from 1.8v)
6 GPIO-3 Reserved Reserved.
7 EI2/GPIO-8 Reserved Reserved.
8 GND Ground