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| 型號： | LH79520N0Q000B1 |
| 廠商： | NXP Semiconductors N.V. |
| 元件分類： | 數(shù)學(xué)處理器 |
| 英文描述： | System-on-Chip |
| 封裝： | LH79520N0Q000B1<SOT1017-1 (LQFP176)|<<http://www.nxp.com/packages/SOT1017-1.html<1<Always Pb-free,; |
| 文件頁數(shù)： | 21/59頁 |
| 文件大小： | 666K |
| 代理商： | LH79520N0Q000B1 |
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System-on-Chip
LH79520
Preliminary data sheet
Rev. 01
—
16 July 2007
21
NXP Semiconductors
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.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LH79520N0Q000B1,55 | 功能描述:IC ARM7 BLUESTREAK MCU 176LQFP RoHS:是 類別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:BlueStreak ; LH7 標準包裝:250 系列:56F8xxx 核心處理器:56800E 芯體尺寸:16-位 速度:60MHz 連通性:CAN，SCI，SPI 外圍設(shè)備:POR，PWM，溫度傳感器，WDT 輸入/輸出數(shù):21 程序存儲器容量:40KB（20K x 16） 程序存儲器類型:閃存 EEPROM 大小:- RAM 容量:6K x 16 電壓 - 電源 (Vcc/Vdd):2.25 V ~ 3.6 V 數(shù)據(jù)轉(zhuǎn)換器:A/D 6x12b 振蕩器型:內(nèi)部 工作溫度:-40°C ~ 125°C 封裝/外殼:48-LQFP 包裝:托盤 配用:MC56F8323EVME-ND - BOARD EVALUATION MC56F8323 |
| LH79520N0Q000B1,551 | 制造商:NXP Semiconductors 功能描述: |
| LH79520N0Q000B1,557 | 制造商:NXP Semiconductors 功能描述:SOC Microcontroller 1.98V 176-Pin LQFP |
| LH79520N0Q000B1;55 | 功能描述:ARM微控制器 - MCU LCD EXT BUS 3 UART RoHS:否 制造商:STMicroelectronics 核心:ARM Cortex M4F 處理器系列:STM32F373xx 數(shù)據(jù)總線寬度:32 bit 最大時鐘頻率:72 MHz 程序存儲器大小:256 KB 數(shù)據(jù) RAM 大小:32 KB 片上 ADC:Yes 工作電源電壓:1.65 V to 3.6 V, 2 V to 3.6 V, 2.2 V to 3.6 V 工作溫度范圍:- 40 C to + 85 C 封裝 / 箱體:LQFP-48 安裝風格:SMD/SMT |
| LH79520N0Q000B155 | 制造商:Rochester Electronics LLC 功能描述: 制造商:NXP 功能描述: 制造商:NXP Semiconductors 功能描述: |
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