SN250 datasheet(11/130 Pages) STMICROELECTRONICS

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SN250

Pin assignment

11/130

GPIO15

I/O

Digital I/O

(enable GPIO15 with GPIO_CFG[2])

TMR1OA

Waveform Output A of Timer 1

(enable TMR1OA with GPIO_CFG[2])

TMR2IA.3

Capture Input A of Timer 2

(enable CAP2-2 with GPIO_CFG[7:4])

IRQC

External interrupt source C

GPIO14

I/O

Digital I/O

(enable GPIO14 with GPIO_CFG[1])

TMR2OB

Waveform Output B of Timer 2

(enable TMR2OB with GPIO_CFG[1])

TMR1IB.3

Capture Input B of Timer 1

(enable CAP1-2 with GPIO_CFG[7:4])

IRQB

External interrupt source B

GPIO13

I/O

Digital I/O

(enable GPIO13 with GPIO_CFG[0])

TMR2OA

Waveform Output A of Timer 2

(enable TMR2OA with GPIO_CFG[0])

TMR1IA.3

Capture Input A of Timer 1

(enable CAP1-2 or CAP1-2h with GPIO_CFG[7:4])

VDD_CORE

Power

1.8V digital core supply

VDD_PRE

Power

1.8V prescaler supply

VDD_SYNTH

Power

1.8V synthesizer supply

OSCB

I/O

24MHz crystal oscillator or left open when using external clock input on

OSCA

I/O

24MHz crystal oscillator or external clock input

GND

Ground

Ground supply pad in the bottom center of the package forms Pin 49 (see

the SN250 Reference Design for PCB considerations)

Table 1.

Pin descriptions (continued)

Pin #

Signal

Direction

Description

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