RN4870 datasheet(8/48 Pages) MICROCHIP

8 / 48 page

RN4870/71

DS50002489A-page 8

 2016 Microchip Technology Inc.

FIGURE 1-5:

BLOCK DIAGRAM OF THE RN4870/71

Pairing Key

Use this pin to force the module to enter Standby mode. The pin must be pulled

down for at least 160 ms.

RF Active Indication

Use this indication pin to indicate that the module is currently performing an

active transmission and receiving BLE data.

TABLE 1-5:

STATUS INDICATION PINS

Status 1

Status 2

State

High

Power On

High

Low

Standby state

Low

Connection established

Low

High

Data session open (Transparent UART)

TABLE 1-6:

TEST POINTS ON THE BOTTOM SIDE

RN4870U

RN4870

RN4871U

RN4871

Symbol

Description

TP-1

TP-3

VCC_PA

1.55V RF PA LDO

TP-2

TP-1

TP-5

CLDO_O

1.2V CLDO Output

TP-3

TP-2

VCC_RF

1.2V RF LDO Output

—

TP-4

ULPC_O

1.2V ULPC LDO Output

—

TP-5

TP-1

BK_O

1.55V Buck Reg Output

TABLE 1-4:

CONFIGURABLE FUNCTIONS AND DESCRIPTIONS (CONTINUED)

Function Name

Description

RN4870/RN4871

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