參數(shù)資料
型號: EP7311-CB-90
廠商: Cirrus Logic Inc
文件頁數(shù): 17/42頁
文件大?。?/td> 0K
描述: IC ARM720T MCU 90MHZ 256-PBGA
標(biāo)準(zhǔn)包裝: 90
系列: EP7
核心處理器: ARM7
芯體尺寸: 32-位
速度: 90MHz
連通性: 編解碼器,EBI/EMI,IrDA,鍵盤,多媒體編解碼器,SPI/Microwire1,UART/USART
外圍設(shè)備: LCD,LED,MaverickKey,PWM
輸入/輸出數(shù): 27
程序存儲器類型: ROMless
RAM 容量: 56K x 8
電壓 - 電源 (Vcc/Vdd): 2.3 V ~ 2.7 V
振蕩器型: 外部
工作溫度: 0°C ~ 70°C
封裝/外殼: 256-BGA
包裝: 托盤
其它名稱: 598-1221
24
4341H–MP3–10/07
AT8xC51SND2C/MP3B
7.
Data Memory
The AT8xC51SND2C provides data memory access in 2 different spaces:
1.
The internal space mapped in three separate segments:
The lower 128 Bytes RAM segment
The upper 128 Bytes RAM segment
The expanded 2048 Bytes RAM segment
2.
The external space.
A fourth internal segment is available but dedicated to Special Function Registers, SFRs,
(addresses 80h to FFh) accessible by direct addressing mode. For information on this segment,
refer to the Section “Special Function Registers”, page 31.
Figure 7-1 shows the internal and external data memory spaces organization.
Figure 7-1.
Internal and External Data Memory Organization
7.1
Internal Space
7.1.1
Lower 128 Bytes RAM
The lower 128 Bytes of RAM (see Figure 7-2) are accessible from address 00h to 7Fh using
direct or indirect addressing modes. The lowest 32 Bytes are grouped into 4 banks of 8 registers
(R0 to R7). 2 bits RS0 and RS1 in PSW register (see Table 7-4) select which bank is in use
according to Table 7-1. This allows more efficient use of code space, since register instructions
are shorter than instructions that use direct addressing, and can be used for context switching in
interrupt service routines.
Table 7-1.
Register Bank Selection
2K Bytes
Upper
128 Bytes
Internal RAM
Lower
128 Bytes
Internal RAM
Special
Function
Registers
80h
00h
7FFh
FFh
00h
FFh
64K Bytes
External XRAM
0000h
FFFFh
Direct Addressing
Addressing
0800h
7Fh
Internal ERAM
Direct or Indirect
Indirect Addressing
EXTRAM = 0
EXTRAM = 1
RS1
RS0
Description
0
Register bank 0 from 00h to 07h
0
1
Register bank 1 from 08h to 0Fh
1
0
Register bank 2 from 10h to 17h
1
Register bank 3 from 18h to 1Fh
相關(guān)PDF資料
PDF描述
EP7311-CB IC ARM720T MCU 74MHZ 256-PBGA
PIC18F2550-I/SO IC PIC MCU FLASH 16KX16 28SOIC
AT87C58X2-SLSUM IC 8051 MCU 32K EPROM 44PLCC
AT87C58X2-SLSUL IC 8051 MCU 32K EPROM 44PLCC
EP7309-CB IC ARM720T MCU 74MHZ 256-PBGA
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
EP7311-CB-C 制造商:CIRRUS 制造商全稱:Cirrus Logic 功能描述:HIGH-PERFORMANCE, LOW-POWER SYSTEM-ON-CHIP WITH SDRAM AND ENHANCED DIGITAL AUDIO INTERFACE
EP7311-CR 制造商:Cirrus Logic 功能描述:LOW-PWR PROCESSOR 208LQFP - Tape and Reel
EP7311-CR-90 功能描述:音頻片上系統(tǒng) - SoC Hi Perf. Low PWR SOC 90MHz RoHS:否 制造商:Cirrus Logic 處理器系列:ARM7 核心:ARM 數(shù)據(jù)總線寬度:32 bit 安裝風(fēng)格: 封裝 / 箱體:
EP7311-CR-C 制造商:CIRRUS 制造商全稱:Cirrus Logic 功能描述:HIGH-PERFORMANCE, LOW-POWER SYSTEM-ON-CHIP WITH SDRAM AND ENHANCED DIGITAL AUDIO INTERFACE
EP7311-CV 功能描述:IC ARM720T MCU 74MHZ 208-LQFP RoHS:否 類別:集成電路 (IC) >> 嵌入式 - 微控制器, 系列:EP7 標(biāo)準(zhǔn)包裝:1,500 系列:AVR® ATtiny 核心處理器:AVR 芯體尺寸:8-位 速度:16MHz 連通性:I²C,LIN,SPI,UART/USART,USI 外圍設(shè)備:欠壓檢測/復(fù)位,POR,PWM,溫度傳感器,WDT 輸入/輸出數(shù):16 程序存儲器容量:8KB(4K x 16) 程序存儲器類型:閃存 EEPROM 大小:512 x 8 RAM 容量:512 x 8 電壓 - 電源 (Vcc/Vdd):2.7 V ~ 5.5 V 數(shù)據(jù)轉(zhuǎn)換器:A/D 11x10b 振蕩器型:內(nèi)部 工作溫度:-40°C ~ 125°C 封裝/外殼:20-SOIC(0.295",7.50mm 寬) 包裝:帶卷 (TR)