CC2430 Datasheet, PDF (62/234 Pages) Texas Instruments – A True System-on-Chip solution for 2.4 GHz IEEE 802.15.4 / ZigBee-TM

CC2430
Interrupt number
0
16
8
1
9
2
10
3
11
4
12
5
13
6
7
14
15
17
Interrupt name
RFERR
RF
DMA
ADC
T1
URX0
T2
URX1
T3
ENC
T4
ST
P0INT
P2INT
UTX0
UTX1
P1INT
WDT
Polling sequence
Table 32: Interrupt Polling Sequence
12.8 Oscillators and clocks
The CC2430 has one internal system clock.
The source for the system clock can be either
a 16 MHz high-frequency RC oscillator or a 32
MHz crystal oscillator. Clock control is
performed using the CLKCON SFR register
described in section 13.10.
The system clock also feeds all 8051
peripherals (as described in section 6).
12.9 Debug Interface
The CC2430 includes a debug interface that
provides a two-wire interface to an on-chip
debug module. The debug interface allows
programming of the on-chip flash and it
provides access to memory and register
contents and debug features such as
breakpoints, single-stepping and register
modification.
The debug interface uses the I/O pins P2_1 as
Debug Data and P2_2 as Debug Clock during
Debug mode. These I/O pins can be used as
general purpose I/O only while the device is
The choice of oscillator allows a trade-off
between high-accuracy in the case of the
crystal oscillator and low power consumption
when the high-frequency RC oscillator is used.
Note that operation of the RF transceiver
requires that the crystal oscillator is used.
not in Debug mode. Thus the debug interface
does not interfere with any peripheral I/O pins.
12.9.1 Debug Mode
Debug mode is entered by forcing two rising
edge transitions on pin P2_2 (Debug Clock)
while the RESET_N input is held low.
While in Debug mode pin P2_1 is the Debug
Data bi-directional pin and P2_2 is the Debug
Clock input pin.
CC2430 PRELIMINARY Data Sheet (rev. 1.03) SWRS036A
Page 62 of 232