參數(shù)資料
型號: ST92F120JV1T
廠商: STMICROELECTRONICS
元件分類: 微控制器/微處理器
英文描述: 16-BIT, FLASH, 24 MHz, MICROCONTROLLER, PQFP64
封裝: TQFP-64
文件頁數(shù): 173/313頁
文件大?。?/td> 4439K
代理商: ST92F120JV1T
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁第62頁第63頁第64頁第65頁第66頁第67頁第68頁第69頁第70頁第71頁第72頁第73頁第74頁第75頁第76頁第77頁第78頁第79頁第80頁第81頁第82頁第83頁第84頁第85頁第86頁第87頁第88頁第89頁第90頁第91頁第92頁第93頁第94頁第95頁第96頁第97頁第98頁第99頁第100頁第101頁第102頁第103頁第104頁第105頁第106頁第107頁第108頁第109頁第110頁第111頁第112頁第113頁第114頁第115頁第116頁第117頁第118頁第119頁第120頁第121頁第122頁第123頁第124頁第125頁第126頁第127頁第128頁第129頁第130頁第131頁第132頁第133頁第134頁第135頁第136頁第137頁第138頁第139頁第140頁第141頁第142頁第143頁第144頁第145頁第146頁第147頁第148頁第149頁第150頁第151頁第152頁第153頁第154頁第155頁第156頁第157頁第158頁第159頁第160頁第161頁第162頁第163頁第164頁第165頁第166頁第167頁第168頁第169頁第170頁第171頁第172頁當前第173頁第174頁第175頁第176頁第177頁第178頁第179頁第180頁第181頁第182頁第183頁第184頁第185頁第186頁第187頁第188頁第189頁第190頁第191頁第192頁第193頁第194頁第195頁第196頁第197頁第198頁第199頁第200頁第201頁第202頁第203頁第204頁第205頁第206頁第207頁第208頁第209頁第210頁第211頁第212頁第213頁第214頁第215頁第216頁第217頁第218頁第219頁第220頁第221頁第222頁第223頁第224頁第225頁第226頁第227頁第228頁第229頁第230頁第231頁第232頁第233頁第234頁第235頁第236頁第237頁第238頁第239頁第240頁第241頁第242頁第243頁第244頁第245頁第246頁第247頁第248頁第249頁第250頁第251頁第252頁第253頁第254頁第255頁第256頁第257頁第258頁第259頁第260頁第261頁第262頁第263頁第264頁第265頁第266頁第267頁第268頁第269頁第270頁第271頁第272頁第273頁第274頁第275頁第276頁第277頁第278頁第279頁第280頁第281頁第282頁第283頁第284頁第285頁第286頁第287頁第288頁第289頁第290頁第291頁第292頁第293頁第294頁第295頁第296頁第297頁第298頁第299頁第300頁第301頁第302頁第303頁第304頁第305頁第306頁第307頁第308頁第309頁第310頁第311頁第312頁第313頁
254/313
J1850 Byte Level Protocol Decoder (JBLPD)
J1850 BYTE LEVEL PROTOCOL DECODER (Cont’d)
10.8.6 DMA Features
The JBLPD can use the ST9 on-chip Direct Mem-
ory Access (DMA) channels to provide high-speed
data transactions between the JBLPD and contig-
uous locations of Register File and Memory. The
transactions can occur from and toward the
JBLPD. The maximum number of transactions that
each DMA channel can perform is 222 with Regis-
ter File or 65536 with Memory. Control of the DMA
features is performed using registers located in the
JBLPD register page (IVR, PRLR, IMR, RDAPR,
RDCPR, TDAPR, TDCPR).
The priority level of the DMA features of the
JBLPD with respect to the other ST9 peripherals
and the CPU is the same as programmed in the
PRLR register for the interrupt sources. In the in-
ternal priority level order of the JBLPD, depending
on the value of the DMASUSP bit in the OPTIONS
register, the DMA may or may not have a higher
priority than the interrupt sources.
Refer to the Interrupt and DMA chapters of the da-
tasheet for details on priority levels.
The DMA features are enabled by setting the ap-
propriate enabling bits (RXD_M, TXD_M) in the
IMR register. It is also possible to select the direc-
tion of the DMA transactions.
Once the DMA table is completed (the transaction
counter reaches 0 value), an interrupt request to
the CPU is generated if the related mask bit is set
(RDRF_M bit in reception, TRDY_M bit in trans-
mission). This kind of interrupt is called “End Of
Block”. The peripheral sends two different “End Of
Block” interrupts depending on the direction of the
DMA (Receiving End Of Block (REOB) - Transmit-
ting End Of Block (TEOB)). These interrupt sourc-
es have dedicated interrupt pending bits in the
PRLR register (REOBP, TEOBP) and they are
mapped to the same interrupt vectors: “Receive
Data Register Full (RDRF)” and “Transmit Ready
(TRDY)” respectively. The same correspondence
exists for the internal priority between interrupts
and interrupt vectors.
10.8.6.1 DMA between JBLPD and Register File
If the DMA transaction is made between the
JBLPD and the Register File, one register is re-
quired to hold the DMA Address and one to hold
the DMA transaction counter. These two registers
must be located in the Register File: the DMA Ad-
dress Register in an even addressed register, the
DMA Transaction Counter in the following register
(odd address). They are pointed to by the DMA
Transaction Counter Pointer Register (RDCPR
register in receiving, TDCPR register in transmit-
ting) located in the JBLPD register page.
To select DMA transactions with the Register File,
the control bits RDCPR.RF/MEM in receiving
mode or TDCPR.RF/MEM in transmitting mode
must be set.
The transaction Counter Register must be initial-
ized with the number of DMA transfers to perform
and it will be decremented after each transaction.
The DMA Address Register must be initialized with
the starting address of the DMA table in the Regis-
ter File, and it is incremented after each transac-
tion. These two registers must be located between
addresses 00h and DFh of the Register File.
When the DMA occurs between JBLPD and Reg-
ister File, the TDAPR register (in transmission)
and the RDAPR register (in reception) are not
used.
10.8.6.2 DMA between JBLPD and Memory
Space
If the DMA transaction is made between the
JBLPD and Memory, a register pair is required to
hold the DMA Address and another register pair to
hold the DMA Transaction counter. These two
pairs of registers must be located in the Register
File. The DMA Address pair is pointed to by the
DMA Address Pointer Registers (RDAPR register
in reception, TDAPR register in transmission) lo-
cated in the JBLPD register page; the DMA Trans-
action Counter pair is pointed to by the DMA
Transaction Counter Pointer Registers (RDCPR
register in reception, TDCPR register in transmis-
sion) located in the JBLPD register page.
To select DMA transactions with Memory Space,
the control bits RDCPR.RF/MEM in receiving
mode or TDCPR.RF/MEM in transmitting mode
must be reset.
The Transaction Counter register pair must be ini-
tialized with the number of DMA transfers to per-
form and it will be decremented after each transac-
tion. The DMA Address register pair must be ini-
tialized with the starting address of the DMA table
in Memory Space, and it is incremented after each
transaction. These two register pairs must be lo-
cated between addresses 00h and DFh of the
Register File.
9
相關(guān)PDF資料
PDF描述
ST92F120V6T 16-BIT, FLASH, 24 MHz, MICROCONTROLLER, PQFP64
ST92F120V9T 16-BIT, FLASH, 24 MHz, MICROCONTROLLER, PQFP64
ST92F124R1T6 16-BIT, FLASH, 24 MHz, MICROCONTROLLER, PQFP64
ST92F150JDV1QCE 16-BIT, FLASH, 5 MHz, MICROCONTROLLER, PQFP100
ST92F250CV2QC 16-BIT, FLASH, 24 MHz, MICROCONTROLLER, PQFP100
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ST92F120V1Q7 功能描述:8位微控制器 -MCU Flash 128K SPI/I2C RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT
ST92F120V9Q7 功能描述:8位微控制器 -MCU RO 511-ST92F150CV1QB RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT
ST92F124R9TB 功能描述:8位微控制器 -MCU Flash 64K SCI/SPI/I2 RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT
ST92F124V1QB 功能描述:8位微控制器 -MCU Flash 128K 2SCI/SPI RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT
ST92F124V1T6 功能描述:8位微控制器 -MCU 8/16-BIT SINGLE VOLT RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT