RoyalTek RSA-1500L - Manual (Page 11)

10
RSA-1500L User Manual
1.7 Hardware interface
Figure 1-6 Hardware Interface
Table 1-2 Definition of Pin assignment
Pin Defined
Pin Signal Name I/O Description Characteristics
1 VCC I DC Supply
Voltage input
DC +3.3V±5%
2 GND G Ground Reference Ground
3 TXA O Serial port A
V V V V V
OL OH
7 . 0 38 . 2 85 . 2 ≤ ≥ ≥
4 RXA I Serial port A V V V V V
IL IH
86 . 0 0.3V - 0 . 2 15 . 3 ≤ ≤ ≥ ≥
5 GPIO-1 I/O General
purpose I/O
V V V V V
IL IH
86 . 0 0.3V - 0 . 2 15 . 3 ≤ ≤ ≥ ≥
V V V V V
OL OH
71 . 0 14 . 2 85 . 2 ≤ ≥ ≥
6 VBATT I Backup voltage
supply 10uA Current
3.6V ~ 2.5 DC
≤
+ +