CC1010-RTR1 datasheet(16/152 Pages) TI

16 / 152 page

CC1010

SWRS047

Page 16 of 152

RBIAS

Current output from internal band gap cell

bias generator. A precision resistor (82

Ω, ±1%) should be connected between

this pin and ground to set the correct bias

current level.

XOSC_Q1, XOSC_Q2

These are the main oscillator connection

pins. An external crystal should be

connected between these pins, and load

capacitors should be connected between

each pin and ground. If an external

oscillator is used, the clock signal should

be connected to the XOSC_Q1 pin, and

XOSC_Q2 should be left open (not

connected).

XOSC32_Q1, XOSC32_Q2

These are the real time clock (RTC)

oscillator connection pins. An external

crystal should be connected between

these pins, and load capacitors should be

connected between each pin and ground.

If an external oscillator is used, the clock

signal should be connected to the

XOSC32_Q1

pin,

and

XOSC32_Q2

should be left open (not connected).

POR_E

Enable signal for the on-chip power-on

reset module. The power-on reset is

enabled when POR_E is connected to

DVDD and disabled when connected to

DGND.

PROG

Active low Flash programming enable pin.

When this signal is active (driven to DGND)

a Flash programmer can be connected to

the SPI interface. Under normal operation

it must be driven to DVDD.

RESET

Active low asynchronous system reset. It

has an internal pull-up resistor and can be

left unconnected during normal operation.

AD0, AD1

Analog inputs to A/D converter channels 0

and 1 respectively. When not used these

pins can be left open (not connected).

AD2 (RSSI/IF)

Analog input to A/D converter channel 2.

This pin can also be configured to be RSSI

output or IF output. The pin is configured

by the FREND register. When not used this

pin can be left open (not connected).

PORT 0

Port 0 is a 4-bit (P0.3-P0.0) bi-directional

CMOS I/O port with 2 mA drivers. A

direction register (P0DIR) controls whether

each pin is an output or input and the

control the logical value of the output.

Pins P0.0 - P0.2 can be configured to

become a master SPI interface in register

SPCR and will then override P0(2:0),

P0DIR(2) and P0DIR(1).

Used as SPI interface, P0.0 is SCK,

P0.1 is MOSI, and P0.2 is MISO.

PORT 1

Port 1 is an 8-bit (P1.7-P1.0) bi-

directional CMOS I/O port with 2 mA

drivers. A direction register (P1DIR)

controls whether each pin is an output or

input and the register P1 is used to read

the input or control the logical value of the

output.

PORT 2

Port 2 is an 8-bit (P2.7-P2.0) bi-

directional CMOS I/O port with 2 mA

drivers, except for P2.3 that has an 8 mA

output buffer. A direction register (P2DIR)

controls whether each pin is an output or

input and the register P2 is used to read

the input or control the logical value of the

output.

Pins P2.0 and P2.1 can be configured to

become the RXD1 and TXD1 pin,

respectively, of UART 1.

Pin P2.2 has a Schmitt-trigger input

stage. Note that while this pin does have

hysteresis, it will draw a large input current

(~0.5 mA) if the input voltage is close to

VDD/2.

PORT 3

Port 3 is a 6-bit (P3.5-P3.0) bi-directional

CMOS I/O port with 2 mA drivers. A

direction register (P3DIR) controls whether

each pin is an output or input. The register

P3 is used to read the input or control the

logical value of the output.

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