RFM50 V1.0

4

Tel: +86-755-82973805

Fax: +86-755-82973550

E-mail: sales@hoperf.com

http://www.hoperf.com

XTAL2

A O

DI

AI

External Clock Output. This pin is the excitation driver for an external crystal or

resonator.

External Clock Input. This pin is the external clock input in external CMOS clock

mode.

External Clock Input. This pin is the external clock input in capacitor or RC

oscillator configurations.

See RF50 Oscillator section for complete details.

P0.2

XTAL1

D I/O or A I

AI

Port 0.2. See RF50 Port I/O Section for a complete description.

External Clock Input. This pin is the external oscillator return for a crystal or

resonator. See RF50 Oscillator section.

P0.0

D I/O or A I

AI

AO

Port 0.0. See RF50 Port I/O section for a complete description.

External VREF Input.

Internal VREF Output. External VREF decoupling capacitors are recommended.

See RF50 Voltage Reference section.

RST/

C2CK

D I/O

D I/O

Device Reset. Open-drain output of internal POR or VDD monitor. An external

source can initiate a system reset by driving this pin low for at least 15 μs. A 1–5

k

pullup to VDD_MCU is recommended. See Reset Sources section for a

　

complete description.

Clock signal for the C2 Debug Interface.

P2.7/

C2D

D I/O

D I/O

Port 2.7. This pin can only be used as GPIO. The Crossbar cannot route signals

to this pin and it cannot be configured as an analog input. See RF50 Port I/O

section for a complete description.

Bi-directional data signal for the C2 Debug Interface.

P2.6

D I/O or A I

Port 2.6. See RF50 Port I/O section for a complete description.

GND

G

Power ground

VDD

PI

Positive power supply, 1.8 to 3.6 V.

P2.5

D I/O or A I

Port 2.5. See RF50 Port I/O section for a complete description.

P2.4

D I/O or A I

Port 2.4. See RF50 Port I/O section for a complete description.

P2.3

D I/O or A I

Port 2.3. See RF50 Port I/O section for a complete description.

P2.2

D I/O or A I

Port 2.2. See RF50 Port I/O section for a complete description.

XTAL4

AO

SmaRTClock Oscillator Crystal Output.

XTAL3

AI

SmaRTClock Oscillator Crystal Input.

P2.1

D I/O or A I

Port 2.1. See RF50 Port I/O section for a complete description.

P2.0

D I/O or A I

Port 2.0. See RF50 Port I/O section for a complete description.

P1.7

D I/O or A I

Port 1.7. See RF50 Port I/O section for a complete description.

P1.6

D I/O or A I

Port 1.6. See RF50 Port I/O section for a complete description.

P1.5

D I/O or A I

Port 1.5. See RF50 Port I/O section for a complete description.

NIRQ

D O

RF22 peripheral interrupt status pin. Will be set low to indicate a pending RF22

interrupt event. See the RF22 Control Logic Registers for more details. This pin

is an open-drain output with a 220 k

internal pullup resistor. An external pull

　

-up

resistor is recommended.

XOUT

AO

RF22 peripheral crystal oscillator output. Connect to an external 30 MHz crystal

or leave floating if driving the XIN pin with an external signal source.