RoyalTek RET-3570LP - Manual (Page 4)

RoyalTek Confidential
2
RET-3570LP User Manual
1.3 Product Pictures and Interface board
(1) RET-3570LP
(2) RET-3570LP Interface board
The interface board pin definition
J2 CONNECTOR
Pin # Signal Name I/O Description Characteristics
1 N.C
2 N.C
3 Battery I Backup voltage supply
10uA Current
3.6V ~ 2.5 DC
≤
+ +
4 VCC I DC Supply Voltage input DC +3.3V ±10%
5 Reset I Reset (Active low) 8 . 0 ; 2.3V V
IH
V V
IL
< >
6-10 N.C
11 TXA O Serial port A V V V V V
OL OH
715 . 0 85 . 2 375 . 2 ≤ ≤ ≤
CMOS TTL level
12 RXA I Serial port A V V V V V
IL IH
855 . 0 0.3V - 15 . 3 995 . 1 ≤ ≤ ≤ ≤
CMOS TTL Level
13 N.C
14 TXB O Serial port B V V V V V
OL OH
715 . 0 85 . 2 375 . 2 ≤ ≤ ≤
CMOS TTL level
Pin 1