參數(shù)資料
型號： DS80C390-QNR
廠商： DALLAS SEMICONDUCTOR
元件分類： Microcontroller
英文描述： 8-BIT, 40 MHz, MICROCONTROLLER, PQCC68
封裝： PLASTIC, LCC-68
文件頁數(shù)： 5/58頁
文件大?。?/td> 5486K
代理商： DS80C390-QNR
DS80C390
13 of 58
110199
INTERNAL MOVX SRAM
The DS80C390 contains 4kB of SRAM that can be configured as user accessible MOVX memory,
program memory, or optional stack memory. The specific configuration and locations are governed by the
Internal Data Memory Configuration bits (IDM1, IDM0) in the Memory Control Register (MCON;C6h).
Note that when the SA bit (ACON.2) is set, the first 1kB of the MOVX data memory is reserved for use
by the 10-bit expanded stack. Internal memory accesses will not generate WR , RD , or PSEN strobes.
The DS80C390 can configure its 4kB of internal SRAM as combined program and data memory. This
allows the application software to execute self-modifiable code. The technique loads the 4kB SRAM
with bootstrap loader software, and then modifies the IDM1 and IDM0 bits to map the 4kB starting at
memory location 40000h. This allows the system to run the bootstrap loader without disturbing the 4 MB
external memory bus, making the device in-system reprogrammable for Flash or NV RAM.
INTERNAL MOVX SRAM CONFIGURATION Table 4
IDM1
IDM0
CMA
MOVX Data Memory
CAN Message
Memory
Shared Program /Data
Memory
0
00F000h-00FFFFh
00EE00h-00EFFFh
- -
0
1
00F000h-00FFFFh
401000h-4011FFh
- -
0
1
0
000000h-000FFFh
00EE00h-00EFFFh
- -
0
1
000000h-000FFFh
401000h-4011FFh
- -
1
0
400000h-400FFFh
00EE00h-00EFFFh
- -
1
0
1
400000h-400FFFh
401000h-4011FFh
- -
1
0
- -
00EE00h-00EFFFh
400000h-400FFFh*
1
- -
401000h-4011FFh
400000h-400FFFh*
*10-bit expanded stack not available in Shared Program /Data Memory mode.
EXTERNAL MEMORY ADDRESSING
The enabling and mapping of the chip enable signals is done via the Port 4 Control Register (P4CNT;92h)
and Memory Control Register (MCON; 96h); The Extended Address and Chip Enable Generation Table
shows which chip enable and address line signals are active on Port 4. Following reset, the device will be
configured with P4.7-P4.4 as address lines and P4.3-P4.0 configured as
0
-
CE3
, with the first program
fetch being performed from 00000h with CE0 active. The following tables illustrate which memory
ranges are controlled by each chip enable as a function of which address lines are enabled.
EXTERNAL MEMORY ADDRESSING PIN ASSIGNMENTS Table 5
Address/Data Bus
CE3
- CE0
PCE3
- PCE0
Addr 19-16 Addr 15-8
Addr 7-0
Data Bus
Multiplexed
P4.3-P4.0
P5.7-P5.4
P4.7-P4.4
P2
P0
Demultiplexed
P4.3-P4.0
P5.7-P5.4
P4.7-P4.4
P2
P1
P0
EXTENDED ADDRESS AND CHIP ENABLE GENERATION Table 6
Port 4 Pin Function
P4CNT.5-3
P4.7
P4.6
P4.5
P4.4
P4CNT.2-0
P4.3
P4.2
P4.1
P4.0
000
I/O
000
I/O
100
I/O
A16
100
I/O
CE0
101
I/O
A17
A16
101
I/O
CE1
CE0
110
I/O
A18
A17
A16
110
I/O
CE2
CE1
CE0
111(default)
A19
A18
A17
A16
111(default)
CE3
CE2
CE1
CE0
相關(guān)PDF資料
PDF描述
DS80C390-FNR 8-BIT, 40 MHz, MICROCONTROLLER, PQFP64
DS80CH11 8-BIT, MICROCONTROLLER, PQFP128
DS83C530-ENL 8-BIT, OTPROM, 33 MHz, MICROCONTROLLER, PQFP52
DS87C530-ECL 8-BIT, OTPROM, 33 MHz, MICROCONTROLLER, PQFP52
DS87C520-MCL 8-BIT, OTPROM, MICROCONTROLLER, PDIP40
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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
DS80C400 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:Network Microcontroller
DS80C400_03 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:Network Microcontroller
DS80C400_07 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:Network Microcontroller
DS80C400_09 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:Network Microcontroller
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。

采購需求

(若只采購一條型號，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進入我的后臺，查看報價

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進入我的后臺，查看報價

*型號 *數(shù)量 廠商 批號 封裝
添加更多采購

我的聯(lián)系方式

*
*
*