參數(shù)資料
型號(hào)： HPC46400EV2
廠商： National Semiconductor Corporation
英文描述： High-Performance Communications MicroController
中文描述： 高性能通信微控制器
文件頁(yè)數(shù)： 4/30頁(yè)
文件大小： 362K
代理商： HPC46400EV2
Connection Diagrams (Continued)
TLDD10422 – 32
Top View
See NS Package Number VHG80A
Wait States
The HPC46400E provides software selectable Wait States
for access to slower memories and for shared bus applica-
tions The number of Wait States for the CPU are selected
by two bits in the PSW register The number of Wait States
for DMA are selected by a bit in the Message System Con-
figuration register Additionally the RDY input may be used
to extend the RD or WR cycle allowing the HPC to be used
in shared memory applications and allowing the user to in-
terface with slow memories and peripherals
Power Save Modes
Two power saving modes are available on the HPC46400E
HALT and IDLE In the HALT mode all processor activities
are stopped In the IDLE mode the on-board oscillator and
timer T0 are active but all other processor activities are
stopped In either mode on-board RAM registers and IO
are unaffected (except the HDLC and UART which are re-
set)
HALT MODE
The HPC46400E is placed in the HALT mode under soft-
ware control by setting bits in the PSW All processor activi-
ties including the clock and timers are stopped In the
HALT mode power requirements for the HPC46400E are
minimal and the applied voltage (VCC) may be decreased
without altering the state of the machine There are two
ways of exiting the HALT mode via the RESET or the NMI
The RESET input reinitializes the processor Use of the NMI
input will generate a vectored interrupt and resume opera-
tion from that point with no initialization The HALT mode
can be enabled or disabled by means of a control register
HALT enable To prevent accidental use of the HALT mode
the HALT enable register can be modified only once
IDLE MODE
The HPC46400E is placed in the IDLE mode through the
PSW In this mode all processor activity except the on-
board oscillator and Timer T0 is stopped The HPC46400E
resumes normal operation upon timer T0 overflow As with
the HALT mode the processor is also returned to full opera-
tion by the RESET or NMI inputs but without waiting for
oscillator stabilization
SLOW MODE
The HPC46400E is placed in the SLOW mode under soft-
ware control by setting ‘‘SLOW’’ bit in ‘‘FEXT’’ Feature Ex-
tension register In this mode CKI is divided by 4 and each
CK2 cycle will be 8 CKI clock cycles This reduction in fre-
quency of operation of HPC16400E is achieved without al-
tering the state of the machine CKI and CKO signals remain
unaffected reagardless of the status of the SLOW bit At
RESET the ‘‘SLOW’’ bit comes up as 0 ie the clocking of
the HPC46400E is normal Software can cause the division
to be enabled or disabled by writinga1ora0tothe
‘‘SLOW’’ bit Note that when the ‘‘SLOW’’ bit is set to 1
HALT or IDLE power down mode cannot be entered
‘‘SLOW’’ bit has to be cleared to a 0 first
12
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
HPC46400EV20 功能描述:16位微控制器 - MCU RoHS:否 制造商:Texas Instruments 核心:RISC 處理器系列:MSP430FR572x 數(shù)據(jù)總線寬度:16 bit 最大時(shí)鐘頻率:24 MHz 程序存儲(chǔ)器大小:8 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:2 V to 3.6 V 工作溫度范圍:- 40 C to + 85 C 封裝 / 箱體:VQFN-40 安裝風(fēng)格:SMD/SMT
HPC46400EV20/NOPB 功能描述:16位微控制器 - MCU RoHS:否 制造商:Texas Instruments 核心:RISC 處理器系列:MSP430FR572x 數(shù)據(jù)總線寬度:16 bit 最大時(shí)鐘頻率:24 MHz 程序存儲(chǔ)器大小:8 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:2 V to 3.6 V 工作溫度范圍:- 40 C to + 85 C 封裝 / 箱體:VQFN-40 安裝風(fēng)格:SMD/SMT
HPC46400EVHG2 制造商:NSC 制造商全稱:National Semiconductor 功能描述:High-Performance Communications MicroController
HPC46400EVHG20 制造商:NSC 制造商全稱:National Semiconductor 功能描述:High-Performance Communications MicroController
HPC46400L20 制造商:未知廠家 制造商全稱:未知廠家 功能描述:16-Bit Microcontroller
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