參數(shù)資料
型號(hào)： P89LPC938FA
廠商： NXP SEMICONDUCTORS
元件分類： 微控制器/微處理器
英文描述： 8-bit microcontroller with accelerated two-clock 80C51 core 8 kB 3 V byte-erasable Flash with 10-bit A/D converter
中文描述： 8-BIT, FLASH, 18 MHz, MICROCONTROLLER, PQCC28
封裝： PLASTIC, MS-018, SOT-261-2, LCC-28
文件頁數(shù)： 22/68頁
文件大小： 318K
代理商： P89LPC938FA
9397 750 14051
Koninklijke Philips Electronics N.V. 2005. All rights reserved.
Product data sheet
Rev. 01 — 25 February 2005
22 of 68
Philips Semiconductors
P89LPC938
8-bit microcontroller with 10-bit A/D converter
CODE
64 kB of Code memory space, accessed as part of program execution and via the
MOVC instruction. The P89LPC938 has 8 kB of on-chip Code memory.
The P89LPC938 also has 512 bytes of on-chip Data EEPROM that is accessed via SFRs
(see
Section 7.27 “Data EEPROM”
).
7.11 Data RAM arrangement
The 768 bytes of on-chip RAM are organized as shown in
Table 6
.
7.12 Interrupts
The P89LPC938 uses a four priority level interrupt structure. This allows great flexibility in
controlling the handling of the many interrupt sources. The P89LPC938 supports
15 interrupt sources: external interrupts 0 and 1, timers 0 and 1, serial port Tx, serial port
Rx, combined serial port Rx/Tx, brownout detect, watchdog/RTC, I
2
C, keyboard,
comparators 1 and 2, SPI, CCU, data EEPROM write/ADC completion.
Each interrupt source can be individually enabled or disabled by setting or clearing a bit in
the interrupt enable registers IEN0 or IEN1. The IEN0 register also contains a global
disable bit, EA, which disables all interrupts.
Each interrupt source can be individually programmed to one of four priority levels by
setting or clearing bits in the interrupt priority registers IP0, IP0H, IP1, and IP1H. An
interrupt service routine in progress can be interrupted by a higher priority interrupt, but
not by another interrupt of the same or lower priority. The highest priority interrupt service
cannot be interrupted by any other interrupt source. If two requests of different priority
levels are pending at the start of an instruction, the request of higher priority level is
serviced.
If requests of the same priority level are pending at the start of an instruction, an internal
polling sequence determines which request is serviced. This is called the arbitration
ranking. Note that the arbitration ranking is only used to resolve pending requests of the
same priority level.
7.12.1
External interrupt inputs
The P89LPC938 has two external interrupt inputs as well as the Keypad Interrupt function.
The two interrupt inputs are identical to those present on the standard 80C51
microcontrollers.
These external interrupts can be programmed to be level-triggered or edge-triggered by
setting or clearing bit IT1 or IT0 in Register TCON.
Table 6:
Type
DATA
IDATA
XDATA
On-chip data memory usages
Data RAM
Memory that can be addressed directly and indirectly
Memory that can be addressed indirectly
Auxiliary (‘External Data’) on-chip memory that is accessed
using the MOVX instructions
Size (bytes)
128
256
512
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
P89LPC938FA,129 功能描述:8位微控制器 -MCU 80C51 8K FL 768B 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(shí)鐘頻率:50 MHz 程序存儲(chǔ)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
P89LPC938FA129 制造商:NXP Semiconductors 功能描述:P89LPC938FA/PLCC28/TUBESM//
P89LPC938FDH 制造商:NXP Semiconductors 功能描述:MCU 8BIT 80C51 8K FLASH TSSOP28 制造商:NXP Semiconductors 功能描述:MCU 8BIT 80C51 8K FLASH, TSSOP28 制造商:NXP Semiconductors 功能描述:MCU 8BIT 80C51 8K FLASH, TSSOP28, Controller Family/Series:(8051) 8052, Core Siz
P89LPC938FDH,529 功能描述:8位微控制器 -MCU 80C51 8K FL 768B 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(shí)鐘頻率:50 MHz 程序存儲(chǔ)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
P89LPC938FDH529 制造商:NXP Semiconductors 功能描述:IC 8BIT MCU 80C51 18MHZ TSSOP-28
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