參數(shù)資料
型號(hào)： TMS320F240PQQ
英文描述： 16-Bit Microcontroller
中文描述： 16位微控制器
文件頁(yè)數(shù)： 19/105頁(yè)
文件大小： 1481K
代理商： TMS320F240PQQ
TMS320C240, TMS320F240
DSP CONTROLLERS
SPRS042D – OCTOBER 1996 – REVISED NOVEMBER 1998
19
POST OFFICE BOX 1443
HOUSTON, TEXAS 77251–1443
device reset and interrupts (continued)
Software-generated interrupts
for the ’x240 device include:
–
The INTR instruction.This instruction allows initialization of any ’x240 interrupt with software. Its
operand indicates to which interrupt vector location the CPU branches. This instruction globally
disables maskable interrupts (sets the INTM bit to 1).
–
The NMI instruction.This instruction forces a branch to interrupt vector location 24h, the same location
used for the nonmaskable hardware interrupt NMI. NMI can be initiated by driving the NMI pin low or by
executing an NMI instruction. This instruction globally disables maskable interrupts.
–
The TRAP instruction.This instruction forces the CPU to branch to interrupt vector location 22h. The
TRAP instruction does notdisable maskable interrupts (INTM is not set to 1); therefore, when the CPU
branches to the interrupt service routine, that routine can be interrupted by the maskable hardware
interrupts.
–
An emulator trap. This interrupt can be generated with either an INTR instruction or a TRAP instruction.
reset
The reset operation ensures an orderly startup sequence for the device. There are five possible causes of a
reset, as shown in Figure 4. Three of these causes are internally generated; the other two causes, the RS and
PORESET pins, are controlled externally.
Signal
Reset
To Reset Out
To Device
Watchdog Timer Reset
Software-Generated Reset
Illegal Address Reset
Reset (RS) Pin Active
Power-On Reset (PORESET) Pin
Active
Figure 4. Reset Signals
The five possible reset signals are generated as follows:
Watchdog timer reset.
A watchdog-timer-generated reset occurs if the watchdog timer overflows or an
improper value is written to either the watchdog key register or the watchdog control register. (Note that
when the device is powered on, the watchdog timer is automatically active.)
Software-generated reset.
This is implemented with the system control register (SYSCR). Clearing the
RESET0 bit (bit 14) or setting the RESET1 bit (bit 15) causes a system reset.
Illegal address reset.
The system and peripheral module control register frame address map contains
unimplemented address locations in the ranges labeled illegal. Any access to an address located in the
Illegal ranges generate an illegal-address reset.
Reset pin active.
To generate an external reset pulse on the RS pin, a low-level pulse duration of as little
as a few nanoseconds is usually effective; however, pulses of one SYSCLK cycle are necessary to ensure
that the device recognizes the reset signal.
Power-on reset pin active.
To generate a power-on reset pulse on the PORESET pin, a low-level pulse
of one SYSCLK cycle is necessary to ensure that the device recognizes the reset signal.
Once a reset source is activated, the external RS pin is driven (active) low for a minimum of eight SYSCLK
cycles. This allows the TMS320x240 device to reset external system components. Additionally, if a brown-out
condition (V
CC
< V
CC
min for several microseconds causing PORESET to go low) occurs or the RS pin is held
low, then the reset logic holds the device in a reset state for as long as these actions are active.
相關(guān)PDF資料
PDF描述
TMS320F240PQS 16-Bit Microcontroller
TMS320LC31-40 Digital Signal Processor
TMS320LC53PQ 16-Bit Digital Signal Processor
TMP320C51HQ Transient Voltage Suppressor Diodes
TMS320C50PQA40 16-Bit Digital Signal Processor
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TMS320F240PQS 功能描述:數(shù)字信號(hào)處理器和控制器 - DSP, DSC 32B Dig Sig Cntrllr w/ Flash RoHS:否 制造商:Microchip Technology 核心:dsPIC 數(shù)據(jù)總線寬度:16 bit 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:2 KB 最大時(shí)鐘頻率:40 MHz 可編程輸入/輸出端數(shù)量:35 定時(shí)器數(shù)量:3 設(shè)備每秒兆指令數(shù):50 MIPs 工作電源電壓:3.3 V 最大工作溫度:+ 85 C 封裝 / 箱體:TQFP-44 安裝風(fēng)格:SMD/SMT
TMS320F241FN 功能描述:數(shù)字信號(hào)處理器和控制器 - DSP, DSC 16B 5V fixed point DSP w/ Flash RoHS:否 制造商:Microchip Technology 核心:dsPIC 數(shù)據(jù)總線寬度:16 bit 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:2 KB 最大時(shí)鐘頻率:40 MHz 可編程輸入/輸出端數(shù)量:35 定時(shí)器數(shù)量:3 設(shè)備每秒兆指令數(shù):50 MIPs 工作電源電壓:3.3 V 最大工作溫度:+ 85 C 封裝 / 箱體:TQFP-44 安裝風(fēng)格:SMD/SMT
TMS320F241FN 制造商:Texas Instruments 功能描述:IC C2000 DSP SMD 320F241 PLCC68
TMS320F241FNA 功能描述:數(shù)字信號(hào)處理器和控制器 - DSP, DSC 16B 5V fixed point DSP w/ Flash RoHS:否 制造商:Microchip Technology 核心:dsPIC 數(shù)據(jù)總線寬度:16 bit 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:2 KB 最大時(shí)鐘頻率:40 MHz 可編程輸入/輸出端數(shù)量:35 定時(shí)器數(shù)量:3 設(shè)備每秒兆指令數(shù):50 MIPs 工作電源電壓:3.3 V 最大工作溫度:+ 85 C 封裝 / 箱體:TQFP-44 安裝風(fēng)格:SMD/SMT
TMS320F241FNS 功能描述:數(shù)字信號(hào)處理器和控制器 - DSP, DSC 16B 5V fixed point DSP w/ Flash RoHS:否 制造商:Microchip Technology 核心:dsPIC 數(shù)據(jù)總線寬度:16 bit 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:2 KB 最大時(shí)鐘頻率:40 MHz 可編程輸入/輸出端數(shù)量:35 定時(shí)器數(shù)量:3 設(shè)備每秒兆指令數(shù):50 MIPs 工作電源電壓:3.3 V 最大工作溫度:+ 85 C 封裝 / 箱體:TQFP-44 安裝風(fēng)格:SMD/SMT
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*