- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄369775 > LH79533 ARM RISC CORE ASSPs ARM7TDMI PDF資料下載
參數(shù)資料
| 型號： | LH79533 |
| 英文描述： | ARM RISC CORE ASSPs ARM7TDMI |
| 中文描述： | ARM的RISC核心專用標準的ARM7TDMI |
| 文件頁數(shù)： | 20/39頁 |
| 文件大小： | 296K |
| 代理商： | LH79533 |
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頁當前第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
LH79520
System-on-Chip
20
8/21/02
Preliminary Data Sheet
Real Time Clock
The RTC can provide a basic alarm function or long
time base counter. This is achieved by generating an
interrupt signal after counting for a programmed num-
ber of cycles of RTC input. Counting in one-second
intervals is achieved by the use of a 1 Hz clock input to
the RTC.
The features of the RTC are:
32-bit up counter with programmable load
Programmable 32-bit match compare register
Software maskable interrupt when counter and com-
pare registers are identical.
RTC input clock sources:
PLL clock
32.768 kHz clock
1 Hz clock (default).
Watchdog Timer
The Watchdog Timer provides hardware protection
against malfunctions. It is a programmable timer to be
reset by software at regular intervals. Failure to reset
the timer will cause a FIQ interrupt. Failure to service
the FIQ interrupt will then generate a System Reset.
The features of the Watchdog Timer are:
Driven by the bus clock
16 programmable time-out periods: 2
16
through 2
31
clock cycles
Generates a system reset (resets LH79520) or a FIQ
Interrupt whenever a time-out period is reached
Software enable, lockout, and counter-reset mecha-
nisms add security against inadvertent writes
Protection mechanism guards against interrupt-ser-
vice failure:
– The first WDT time-out triggers FIQ and asserts
nWDFIQ status flag
– If FIQ service routine fails to clear nWDFIQ, then
the next WDT time-out triggers a soft reset.
Timer
The LH79520 incorporates two Timer modules,
each comprising two 16-bit independently programma-
ble timers. This gives a total of four independent timers.
Each timer has two operating modes:
– Free-running mode: After reaching 0x0000 the
timer wraps around to 0xFFFF and generates an
interrupt request. It continues to count down from
0xFFFF.
– Periodic timer mode: After reaching 0x0000 the
timer is automatically reloaded with its pro-
grammed value and generates an interrupt re-
quest. It continues to count down from the
loaded value.
Each timer contains a programmable pre-scaler:
– Bus clock divided by 1, 16, or 256
Timers can be cascaded to achieve longer timing
periods
Carry-out of higher-order timer provides clock signal
for next lower order timer
Possible timing ranges:
– 2
15
(single timer)
– 2
31
(two timers cascaded)
– 2
47
(three timers cascaded)
– 2
63
(four timers cascaded)
Output signal of lowest order timer is externally avail-
able as CTOUT1B signal.
Input/Output Configuration System
The registers provided by the IOCON System allow
the user to directly control the pin multiplexing of the
device; by setting or clearing bits in a set of registers,
the user can configure the LH79520 for peripheral
devices.
General Purpose Input/Output (GPIO)
The LH79520 provides up to 64 bits of programma-
ble input/output. These eight 8-bit ports are Ports A
through H, and are multiplexed with other signals.
Individually programmable input/output pins
All I/O ports default to Input on power-up.
相關PDF資料 |
PDF描述 |
|---|---|
| LIC01 | LIGHT IGNITION CIRCUIT |
| LIC01-195I | SINGLE BIDIRECTIONAL BREAKOVER DIODE|230V V(BO) MAX|500UA I(S)|TO-262AA |
| LIC01-215B-TR | LIGHT IGNITION CIRCUIT |
| LIC01-215I | SINGLE BIDIRECTIONAL BREAKOVER DIODE|255V V(BO) MAX|500UA I(S)|TO-262AA |
| LIC01-SERIES | LIGHT IGNITION CIRCUIT |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| LH7A400 | 制造商:SHARP 制造商全稱:Sharp Electrionic Components 功能描述:32-Bit System-on-Chip |
| LH7A400N0B000 | 制造商:SHARP 制造商全稱:Sharp Electrionic Components 功能描述:32-Bit System-on-Chip |
| LH7A400N0B000B3A | 功能描述:IC ARM9 BLUESTREAK MCU 256PBGA RoHS:否 類別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:BlueStreak ; LH7A 產(chǎn)品培訓模塊:The Ultra-Low Power MSP430 MSP430 Overview MSP430 Design Tools MSP430 Peripherals MSP430x2xx/4xx and Wireless Overview Portable Medical Solutions with MSP430 MSP430 for Utility Metering Solutions MSP430: How to JTAG MSP430, How To Use the Clock System Grace Software Graphical User Interface MCU Overview Driver Library MSP430Ware Overview 標準包裝:1 系列:MSP430x4xx 核心處理器:RISC 芯體尺寸:16-位 速度:8MHz 連通性:SPI，UART/USART 外圍設備:欠壓檢測/復位，LCD，POR，PWM，WDT 輸入/輸出數(shù):48 程序存儲器容量:32KB（32K x 8 + 256B） 程序存儲器類型:閃存 EEPROM 大小:- RAM 容量:1K x 8 電壓 - 電源 (Vcc/Vdd):1.8 V ~ 3.6 V 數(shù)據(jù)轉換器:A/D 8x12b 振蕩器型:內部 工作溫度:-40°C ~ 85°C 封裝/外殼:100-LQFP 包裝:Digi-Reel® 其它名稱:296-26232-6 |
| LH7A400N0B000B3A,551 | 制造商:NXP Semiconductors 功能描述: |
| LH7A400N0B000B5,551 | 制造商:NXP Semiconductors 功能描述: |
發(fā)布緊急采購，3分鐘左右您將得到回復。