參數(shù)資料
型號： C8051F010-TB
廠商： Silicon Laboratories Inc
文件頁數(shù)： 164/171頁
文件大小： 0K
描述： BOARD PROTOTYPING W/C8051F010
標(biāo)準(zhǔn)包裝： 1
C8051F000/1/2/5/6/7
C8051F010/1/2/5/6/7
12. EXTERNAL RAM (C8051F005/06/07/15/16/17)
The C8051F005/06/07/15/16/17 MCUs include 2048 bytes of RAM mapped into the external data memory space.
All of these address locations may be accessed using the external move instruction (MOVX) and the data pointer
(DPTR), or using MOVX indirect addressing mode. If the MOVX instruction is used with an 8-bit address operand
(such as @R1), then the high byte of the 16-bit address is provided by the External Memory Interface Control
Register (EMI0CN as shown in Figure 12.1). Note: the MOVX instruction is also used for writes to the Flash
memory. See Section 11 for details. The MOVX instruction accesses XRAM by default (i.e. PSTCL.0 = 0).
For any of the addressing modes the upper 5-bits of the 16-bit external data memory address word are “don’t cares”.
As a result, the 2048-byte RAM is mapped modulo style over the entire 64k external data memory address range.
For example, the XRAM byte at address 0x0000 is also at address 0x0800, 0x1000, 0x1800, 0x2000, etc. This is a
useful feature when doing a linear memory fill, as the address pointer doesn’t have to be reset when reaching the
RAM block boundary.
Figure 12.1. EMI0CN: External Memory Interface Control
R
R/W
Reset Value
-
PGSEL2
PGSEL1
PGSEL0
00000000
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
SFR Address:
0xAF
Bits 7-3: Not Used – reads 00000b
Bits 2-0: PGSEL[2:0]: XRAM Page Select Bits
The XRAM Page Select Bits provide the high byte of the 16-bit external data memory
address when using an 8-bit MOVX command, effectively selecting a 256-byte page of
RAM. The upper 5-bits are “don’t cares”, so the 2k address blocks are repeated modulo
over the entire 64k external data memory address space.
000: xxxxx000b
001: xxxxx001b
010: xxxxx010b
011: xxxxx011b
100: xxxxx100b
101: xxxxx101b
110: xxxxx110b
111: xxxxx111b
Rev. 1.7
92
相關(guān)PDF資料
PDF描述
ISC1210ER3R3J INDUCTOR WW 3.3UH 5% 1210
RP15-4812DF/P-HC CONV DC/DC 15W 36-75VIN +/-12V
ISC1210ER2R7J INDUCTOR WW 2.7UH 5% 1210
ISC1210ER2R2J INDUCTOR WW 2.2UH 5% 1210
GSM06DRKF CONN EDGECARD 12POS DIP .156 SLD
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
C8051F011 功能描述:8位微控制器 -MCU 32KB 10ADC 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
C8051F011-GQ 功能描述:8位微控制器 -MCU 32KB 10ADC 48P MCU 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
C8051F011-GQR 功能描述:8位微控制器 -MCU 32KB 10ADC 48Pin MCU Tape and Reel 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
C8051F011R 功能描述:8位微控制器 -MCU C 10Bit 48Pin 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
C8051F012 功能描述:8位微控制器 -MCU 32KB 10ADC 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
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(jìn)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(jìn)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

*
*
*