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參數(shù)資料
| 型號： | P89LPC901FD,112 |
| 廠商： | NXP Semiconductors |
| 文件頁數(shù)： | 33/53頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC 80C51 MCU FLASH 1K 8-SOIC |
| 產(chǎn)品培訓(xùn)模塊： | Migrating from 8/16-Bit MCUs to 32-Bit ARMs |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 系列： | LPC900 |
| 核心處理器： | 8051 |
| 芯體尺寸： | 8-位 |
| 速度： | 18MHz |
| 外圍設(shè)備： | 欠壓檢測/復(fù)位，LED，POR，PWM，WDT |
| 輸入/輸出數(shù)： | 6 |
| 程序存儲器容量： | 1KB（1K x 8） |
| 程序存儲器類型： | 閃存 |
| RAM 容量： | 128 x 8 |
| 電壓 - 電源 (Vcc/Vdd)： | 2.4 V ~ 3.6 V |
| 振蕩器型： | 內(nèi)部 |
| 工作溫度： | -40°C ~ 85°C |
| 封裝/外殼： | 8-SOIC（0.154"，3.90mm 寬） |
| 包裝： | 剪切帶 (CT) |
| 配用： | 622-1009-ND - BOARD FOR LPC901 8-DIP 622-1008-ND - BOARD FOR LPC9103 10-HVSON 622-1006-ND - SOCKET ADAPTER BOARD 622-1002-ND - USB IN-CIRCUIT PROG LPC9XX 568-1759-ND - EMULATOR DEBUGGER/PROGRMMR LPC9X |
| 其它名稱： | 568-1994-1 |
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Philips Semiconductors
P89LPC901/902/903
8-bit microcontrollers with two-clock 80C51 core
Product data
Rev. 05 — 17 December 2004
39 of 53
9397 750 14465
Koninklijke Philips Electronics N.V. 2004. All rights reserved.
8.23 Keypad interrupt (KBI)
The Keypad Interrupt function is intended primarily to allow a single interrupt to be
generated when Port 0 is equal to or not equal to a certain pattern. This function can
be used for bus address recognition or keypad recognition. The user can congure
the port via SFRs for different tasks.
The Keypad Interrupt Mask Register (KBMASK) is used to dene which input pins
connected to Port 0 can trigger the interrupt. The Keypad Pattern Register (KBPATN)
is used to dene a pattern that is compared to the value of Port 0. The Keypad
Interrupt Flag (KBIF) in the Keypad Interrupt Control Register (KBCON) is set when
the condition is matched while the Keypad Interrupt function is active. An interrupt will
be generated if enabled. The PATN_SEL bit in the Keypad Interrupt Control Register
(KBCON) is used to dene equal or not-equal for the comparison.
In order to use the Keypad Interrupt as an original KBI function like in 87LPC76x
series, the user needs to set KBPATN = 0FFH and PATN_SEL = 1 (not equal), then
any key connected to Port 0 which is enabled by the KBMASK register will cause the
hardware to set KBIF and generate an interrupt if it has been enabled. The interrupt
may be used to wake up the CPU from Idle or Power-down modes. This feature is
particularly useful in handheld, battery powered systems that need to carefully
manage power consumption yet also need to be convenient to use.
In order to set the ag and cause an interrupt, the pattern on Port 0 must be held
longer than six CCLKs.
8.24 Watchdog timer
The Watchdog timer causes a system reset when it underows as a result of a failure
to feed the timer prior to the timer reaching its terminal count. It consists of a
programmable 12-bit prescaler, and an 8-bit down counter. The down counter is
decremented by a tap taken from the prescaler. The clock source for the prescaler is
either the PCLK or the nominal 400 kHz Watchdog oscillator. The Watchdog timer
can only be reset by a power-on reset. When the Watchdog feature is disabled, it can
be used as an interval timer and may generate an interrupt. Figure 20 shows the
Watchdog timer in Watchdog mode. Feeding the watchdog requires a two-byte
sequence. If PCLK is selected as the Watchdog clock and the CPU is powered-down,
the watchdog is disabled. The Watchdog timer has a time-out period that ranges from
afew
s to a few seconds. Please refer to the P89LPC901/902/903 User’s Manual for
more details.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| P89LPC901FN | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:8-bit microcontrollers with two-clock 80C51 core 1 kB 3 V Flash with 128-byte RAM |
| P89LPC901FN,129 | 功能描述:8位微控制器 -MCU 80C51 1K FL 128B RAM 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(fēng)格:SMD/SMT |
| P89LPC901FN.129 | 制造商:NXP Semiconductors 功能描述:8BIT MCU 1K FLASH 89LC901 DIP8 制造商:NXP Semiconductors 功能描述:8BIT MCU 1K FLASH, 89LC901, DIP8 |
| P89LPC901FN129 | 制造商:NXP Semiconductors 功能描述:IC 8BIT MCU 80C51 12MHZ DIP-8 |
| P89LPC902 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:8-bit microcontrollers with two-clock 80C51 core 1 kB 3 V Flash with 128-byte RAM |
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