RoyalTek RSA-1500L user manual Hardware interface, Pin Defined

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	DC +3.3V±5%
			Voltage input
2	GND	G	Ground	Reference Ground
3	TXA	O	Serial port A	2.85V ≥ VOH ≥ 2.38V		VOL ≤ 0.7V
4	RXA	I	Serial port A	3.15V ≥ VIH	≥ 2.0V	- 0.3V ≤ VIL	≤ 0.86V
5	GPIO-1	I/O	General	3.15V ≥ VIH	≥ 2.0V	- 0.3V ≤ VIL	≤ 0.86V
			purpose I/O	2.85V ≥ VOH	≥ 2.14V	VOL ≤ 0.71V
6	VBATT	I	Backup voltage	DC + 2.5 ~ +3.6V
			supply	Current ≤ 10uA

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