參數(shù)資料
型號： DS89C420-ECL
英文描述： Ultra-High-Speed Microcontroller
中文描述： 超高速微控制器
文件頁數(shù)： 43/59頁
文件大?。?/td> 539K
代理商： DS89C420-ECL
DS89C420
43 of 59
vector using the RETI instruction, the next address is the one that immediately follows the instruction that
invoked the idle mode. Any processor resets also remove the idle mode.
Stop Mode
The stop mode disables all circuits within the processor. All on-chip clocks, timers, and serial port
communication are stopped, and no processing is possible.
Stop mode is invoked by setting the STOP bit (PCON.1) to logic 1. The processor enters the stop mode
on the instruction that sets the bit. The processor can exit stop mode by using any of the six external
interrupts that are enabled.
An external reset by the RST pin unconditionally exits the processor from stop mode. If the BGS bit is set
to logic 1, the bandgap provides a reset while in stop mode if V
CC
should drop below the V
RST
level. If
BGS is 0, no reset is generated if V
CC
drops below V
RST
.
When the stop mode is removed, the processor waits for 65,536 clock cycles for the internal flash
memory to warm up before starting normal execution. Also, the processor waits for the crystal warmup
period if not using the ring oscillator.
Serial I/O
The DS89C420 provides a serial port (UART) that is identical to the 80C52. In addition, it includes a
second hardware serial port that is a full duplicate of the standard one. This port optionally uses pins P1.2
(RXD1) and P1.3 (TXD1) and has duplicate control functions included in new SFR locations.
Both ports can operate simultaneously but can be at different baud rates or even in different modes. The
second serial port has similar control registers (SCON1 at C0h, SBUF1 at C1h) as the original. The new
serial port can only use timer 1 for timer-generated baud rates.
Control for serial port 0 is provided by the SCON0 register while its I/O buffer is SBUF0. Registers
SCON1 and SBUF1 provide the same functions for the second serial port. A full description of the use
and operation of both serial ports is in the
Ultra-High-Speed Flash Microcontroller User’s Guide.
Instruction Set
The DS89C420 instructions are 100% binary compatible with the industry standard 8051, and are only
different in the number of machine cycles used for the instructions. Some special conditions and features
should be considered when analyzing the DS89C420 instruction set. Full details are given in the
Ultra-
High-Speed Flash Microcontroller User’s Guide.
相關(guān)PDF資料
PDF描述
DS89C420-MCL Ultra-High-Speed Microcontroller
DS9094 iButtonTM Clip
DS9097 COM Port Adapter
DS9097E COM Port Adapter
DS9098P iButton Retainer
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
DS89C420-ECS 功能描述:IC MCU 50MHZ ULTRA HS 44-TQFP RoHS:否 類別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:89C 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:260 系列:73S12xx 核心處理器:80515 芯體尺寸:8-位 速度:24MHz 連通性:I²C，智能卡，UART/USART，USB 外圍設(shè)備:LED，POR，WDT 輸入/輸出數(shù):9 程序存儲器容量:64KB（64K x 8） 程序存儲器類型:閃存 EEPROM 大小:- RAM 容量:2K x 8 電壓 - 電源 (Vcc/Vdd):2.7 V ~ 5.5 V 數(shù)據(jù)轉(zhuǎn)換器:- 振蕩器型:內(nèi)部 工作溫度:-40°C ~ 85°C 封裝/外殼:68-VFQFN 裸露焊盤 包裝:管件
DS89C420-ENG 功能描述:IC MCU ULTRA 25MHZ HP 44-TQFP RoHS:否 類別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:89C 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:260 系列:73S12xx 核心處理器:80515 芯體尺寸:8-位 速度:24MHz 連通性:I²C，智能卡，UART/USART，USB 外圍設(shè)備:LED，POR，WDT 輸入/輸出數(shù):9 程序存儲器容量:64KB（64K x 8） 程序存儲器類型:閃存 EEPROM 大小:- RAM 容量:2K x 8 電壓 - 電源 (Vcc/Vdd):2.7 V ~ 5.5 V 數(shù)據(jù)轉(zhuǎn)換器:- 振蕩器型:內(nèi)部 工作溫度:-40°C ~ 85°C 封裝/外殼:68-VFQFN 裸露焊盤 包裝:管件
DS89C420-ENL 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:Ultra-High-Speed Microcontroller
DS89C420-MCL 功能描述:IC MCU ULTRA 33MHZ HP 40-DIP RoHS:否 類別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:89C 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:260 系列:73S12xx 核心處理器:80515 芯體尺寸:8-位 速度:24MHz 連通性:I²C，智能卡，UART/USART，USB 外圍設(shè)備:LED，POR，WDT 輸入/輸出數(shù):9 程序存儲器容量:64KB（64K x 8） 程序存儲器類型:閃存 EEPROM 大小:- RAM 容量:2K x 8 電壓 - 電源 (Vcc/Vdd):2.7 V ~ 5.5 V 數(shù)據(jù)轉(zhuǎn)換器:- 振蕩器型:內(nèi)部 工作溫度:-40°C ~ 85°C 封裝/外殼:68-VFQFN 裸露焊盤 包裝:管件
DS89C420-MCS 功能描述:IC MCU 50MHZ ULTRA HS 40-DIP RoHS:否 類別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:89C 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:260 系列:73S12xx 核心處理器:80515 芯體尺寸:8-位 速度:24MHz 連通性:I²C，智能卡，UART/USART，USB 外圍設(shè)備:LED，POR，WDT 輸入/輸出數(shù):9 程序存儲器容量:64KB（64K x 8） 程序存儲器類型:閃存 EEPROM 大小:- RAM 容量:2K x 8 電壓 - 電源 (Vcc/Vdd):2.7 V ~ 5.5 V 數(shù)據(jù)轉(zhuǎn)換器:- 振蕩器型:內(nèi)部 工作溫度:-40°C ~ 85°C 封裝/外殼:68-VFQFN 裸露焊盤 包裝:管件
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