National CP3BT26 User Manual

9

www.national.com

X1CKI

1

Input

12 MHz Oscillator Input

BBCLK

BB reference clock for the RF Interface

X1CKO

1

Output

12 MHz Oscillator Output

None

None

X2CKI

1

Input

32 kHz Oscillator Input

None

None

X2CKO

1

Output

32 kHz Oscillator Output

None

None

RESET

1

Input

Chip general reset

None

None

ENV0

1

I/O

Special mode select input with
internal pull-up during reset

PLLCLK

PLL Clock Output

ENV1

1

I/O

Special mode select input with
internal pull-up during reset

CPUCLK

CPU Clock Output

ENV2

1

I/O

Special mode select input with
internal pull-up during reset

SLOWCLK

Slow Clock Output

TMS

1

Input

JTAG Test Mode Select
(with internal weak pull-up)

None

None

TCK

1

Input

JTAG Test Clock Input
(with internal weak pull-up)

None

None

TDI

1

Input

JTAG Test Data Input
(with internal weak pull-up)

None

None

TDO

1

Output

JTAG Test Data Output

None

None

RDY

1

Output

NEXUS Ready Output

None

None

VCC

6

Input

2.5V Core Logic
Power Supply

None

None

GND

6

Input

Core Ground

None

None

IOVCC

15

Input

2.5

–

3.3V I/O Power Supply

None

None

IOGND

14

Input

I/O Ground

None

None

AVCC

1

Input

PLL Analog Power Supply

None

None

AGND

1

Input

PLL Analog Ground

None

None

ADVCC

1

Input

ADC Analog Power Supply

None

None

ADGND

1

Input

ADC Analog Ground

None

None

RFDATA

1

I/O

Bluetooth RX/TX Data Pin 

None

None

SCL

1

I/O

ACCESS.bus Clock

None

None

SDA

1

I/O

ACCESS.bus Serial Data

None

None

D-

1

I/O

USB D- Upstream Port

None

None

D+

1

I/O

USB D+ Upstream Port

None

None

UVCC

1

Input

3.3V USB Transceiver Supply

None

None

UGND

1

Input

USB Transceiver Ground

None

None

ADC0

1

I/O

ADC Input Channel 0

TSX+

Touchscreen X+ contact

ADC1

1

I/O

ADC Input Channel 1

TSY+

Touchscreen Y+ contact

ADC2

1

I/O

ADC Input Channel 2

TSX-

Touchscreen X- contact