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參數(shù)資料
| 型號： | DS80C390-FNR |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 37/53頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC MPU CAN DUAL HS IND 64-LQFP |
| 產(chǎn)品培訓(xùn)模塊： | Lead (SnPb) Finish for COTS |
| 產(chǎn)品變化通告： | Product Discontinuation 20/Feb/2012 |
| 標(biāo)準(zhǔn)包裝： | 160 |
| 系列： | 80C |
| 核心處理器： | 8051 |
| 芯體尺寸： | 8-位 |
| 速度： | 40MHz |
| 連通性： | CAN，EBI/EMI，SIO，UART/USART |
| 外圍設(shè)備： | 電源故障復(fù)位，WDT |
| 輸入/輸出數(shù)： | 32 |
| 程序存儲器類型： | ROMless |
| RAM 容量： | 4K x 8 |
| 電壓 - 電源 (Vcc/Vdd)： | 3.85 V ~ 5.5 V |
| 振蕩器型： | 外部 |
| 工作溫度： | -40°C ~ 85°C |
| 封裝/外殼： | 64-LQFP |
| 包裝： | 托盤 |
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DS80C390 Dual CAN High-Speed Microprocessor
42 of 53
TIMED-ACCESS PROTECTION
Selected SFR bits are critical to operation, making it desirable to protect them against an accidental write
operation. The timed-access procedure prevents an errant processor from accidentally altering bits that would
seriously affect processor operation. The timed-access procedure requires that the write of a protected bit be
immediately preceded by the following two instructions:
MOV
0C7h, #0AAh
MOV
0C7h, #55h
Writing an AAh followed by a 55h to the timed-access register (location C7h) opens a three-cycle window that
allows software to modify one of the protected bits. If the instruction that seeks to modify the protected bit is not
immediately preceded by these instructions, the write is ignored. The protected bits are:
WDCON.6
POR
Power-On Reset Flag
WDCON.3
WDIF
Watchdog Interrupt Flag
WDCON.1
EWT
Watchdog Reset Enable
WDCON.0
RWT
Reset Watchdog Timer
RCON.0
BGS
Bandgap Select
ACON.2
SA
Stack Address Mode
ACON.1–0
AM1–AM0
Address Mode Select bits
MCON.7–6
IDM1–IDM0
Internal Memory Configuration and Location bits
MCON.5
CMA
CAN Data Memory Assignment
MCON.3–0
PDCE3–PDCE.0
Program/Data Chip Enables
C0C.3
CRST
CAN 0 Reset
C1C.3
CRST
CAN 1 Reset
P4CNT.6
SBCAN
Single Bus CAN
P4CNT.5–0
Port 4 Pin Configuration Control Bits
P5CNT.2–0
P5.7–P5.5
Configuration Control Bits
COR.7
IRDACK
IRDA Clock Output Enable
COR.6–5
C1BPR7–C1BPR6
CAN 1 Baud Rate Prescale Bits
COR.4–3
C0BPR7–C0BPR6
CAN 0 Baud Rate Prescale Bits
COR.2–1
COD1–COD0
CAN Clock Output Divide Bit 1 and Bit 0
COR.0
CLKOE
CAN Clock Output Enable
EMI REDUCTION
One of the major contributors to radiated noise in an 8051-based system is the toggling of ALE. The microcontroller
allows software to disable ALE when not used by setting the ALEOFF (PMR.2) bit to 1. When ALEOFF = 1, ALE
automatically toggles during an off-chip MOVX. However, ALE remains static when performing on-chip memory
access. The default state of ALEOFF is 0 so ALE normally toggles at a frequency of XTAL/4.
PERIPHERAL OVERVIEW
The DS80C390 provides several of the most commonly needed peripheral functions in microcomputer-based
systems. New functions include a second serial port, power-fail reset, power-fail interrupt flag, and a programmable
watchdog timer. In addition, the microcontroller contains two CAN modules for industrial communication
applications. Each of these peripherals is described in the following paragraphs. More details are available in the
High-Speed Microcontroller User’s Guide
and the DS80C390 Supplement.
SERIAL PORTS
The microcontroller 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 second port optionally uses pins P1.2 (RXD1)
and P1.3 (TXD1). It has duplicate control functions included in new SFR locations. The second serial port can
alternately be mapped to P5.2 and P5.3 to allow use of both serial ports in nonmultiplexed mode.
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, SBUF1) to the original. The new serial port can only use Timer 1
for baud-rate generation.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS80C390-FNR+ | 功能描述:8位微控制器 -MCU Dual CAN High-Speed 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 |
| DS80C390-QCR | 功能描述:8位微控制器 -MCU Dual CAN High-Speed 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 |
| DS80C390-QCR+ | 功能描述:8位微控制器 -MCU Dual CAN High-Speed 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 |
| DS80C390-QNR | 功能描述:8位微控制器 -MCU Dual CAN High-Speed 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 |
| DS80C390-QNR+ | 功能描述:8位微控制器 -MCU Dual CAN High-Speed 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 |
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