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CC2430F32RTC 参数 Datasheet PDF下载

CC2430F32RTC图片预览
型号: CC2430F32RTC
PDF下载: 下载PDF文件 查看货源
内容描述: 真正的系统级芯片解决方案的2.4 GHz IEEE 802.15.4 / ZigBee的 [A True System-on-Chip solution for 2.4 GHz IEEE 802.15.4 / ZigBee]
分类和应用: 电信集成电路
文件页数/大小: 212 页 / 1862 K
品牌: TAOS [ TEXAS ADVANCED OPTOELECTRONIC SOLUTIONS ]
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CC2430  
Radio : CSMA/CA Strobe Processor  
The antenna should be connected as close as  
possible to the IC. If the antenna is located  
away from the RF pins the antenna should be  
matched to the feeding transmission line  
(50).  
14.34 CSMA/CA Strobe Processor  
The Command Strobe/CSMA-CA Processor  
(CSP) provides the control interface between  
the CPU and the Radio module in the CC2430.  
Strobe instruction is also used only to control  
the CSP. The Immediate Command Strobe  
instructions are described in section 14.34.7.  
Program execution mode means that the CSP  
executes a sequence of instructions, from a  
program memory or instruction memory, thus  
constituting a short user-defined program. The  
available instructions are from a set of 14  
instructions. The instruction set is defined in  
section 14.34.8. The required program is first  
loaded into the CSP by the CPU, and then the  
CPU instructs the CSP to start executing the  
program.  
The CSP interfaces with the CPU through the  
SFR register RFSTand the RF registers CSPX,  
CSPY, CSPZ, CSPT and CSPCTRL. The CSP  
produces interrupt requests to the CPU. In  
addition the CSP interfaces with the MAC  
Timer by observing MAC Timer overflow  
events.  
The CSP allows the CPU to issue command  
strobes to the radio thus controlling the  
operation of the radio.  
The program execution mode together with the  
MAC Timer allows the CSP to automate  
CSMA-CA algorithms and thus act as a co-  
processor for the CPU.  
The CSP has two modes of operation as  
follows, which are described below.  
Immediate Command Strobe execution.  
Program execution  
The operation of the CSP is described in detail  
in the following sections. The command  
strobes and other instructions supported by  
the CSP are given in section 14.34.8 on page  
179.  
Immediate Command Strobes are written as  
an Immediate Command Strobe instruction to  
the CSP which are issued instantly to the  
Radio module. The Immediate Command  
RFST (0xE1) – RF CSMA-CA/Strobe Processor  
Bit Name  
Reset  
R/W  
Description  
7:0  
0xC0  
R/W  
Data written to this register will be written to the CSP  
instruction memory. Reading this register will return the  
CSP instruction currently being executed.  
INSTR[7:0]  
14.34.1 Instruction Memory  
The CSP executes single byte program  
instructions which are read from a 24 byte  
instruction memory. The instruction memory is  
written to sequentially through the SFR  
register RFST. An instruction write pointer is  
maintained within the CSP to hold the location  
within the instruction memory where the next  
instruction written to RFST will be stored.  
Following a reset the write pointer is reset to  
location 0. During each RFST register write,  
the write pointer will be incremented by 1 until  
the end of memory is reached when the write  
pointer will stop incrementing, thus writing  
more than 24 bytes only the last byte written  
will be stored in the last position. The first  
instruction written to RFST will be stored in  
location 0, the location where program  
execution starts. Thus a complete CSP  
program may contain a maximum of 24 bytes  
that is written to the instruction memory by  
writing each instruction in the desired order to  
the RFST register. Note that the program  
memory does not need to be filled, thus a CSP  
program may contain less than 24 bytes.  
The write pointer may be reset to 0 by writing  
the immediate command strobe instruction  
ISSTOP. In addition the write pointer will be  
reset to 0 when the command strobe SSTOP  
is executed in a program.  
Following a reset, the instruction memory is  
filled with SNOP (No Operation) instructions  
(opcode value 0xC0).  
While the CSP is executing a program, there  
shall be no attempts to write instructions to the  
instruction memory by writing to RFST. Failure  
to observe this rule can lead to incorrect  
program execution and corrupt instruction  
memory contents. However, Immediate  
Command Strobe instructions may be written  
to RFST(see section 14.34.3).  
CC2430 Data Sheet (rev. 2.1) SWRS036F  
Page 176 of 211