- 您現在的位置：買賣IC網 > PDF目錄363904 > W88227QD (WINBOND ELECTRONICS CORP) ATAPI CD-ROM Decoder(支持ATAPI標準的CD-ROM解碼器) PDF資料下載
參數資料
| 型號： | W88227QD |
| 廠商： | WINBOND ELECTRONICS CORP |
| 元件分類： | 消費家電 |
| 英文描述： | ATAPI CD-ROM Decoder(支持ATAPI標準的CD-ROM解碼器) |
| 中文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP128 |
| 封裝： | LQFP-128 |
| 文件頁數： | 99/116頁 |
| 文件大小： | 787K |
| 代理商： | W88227QD |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁第62頁第63頁第64頁第65頁第66頁第67頁第68頁第69頁第70頁第71頁第72頁第73頁第74頁第75頁第76頁第77頁第78頁第79頁第80頁第81頁第82頁第83頁第84頁第85頁第86頁第87頁第88頁第89頁第90頁第91頁第92頁第93頁第94頁第95頁第96頁第97頁第98頁當前第99頁第100頁第101頁第102頁第103頁第104頁第105頁第106頁第107頁第108頁第109頁第110頁第111頁第112頁第113頁第114頁第115頁第116頁
Preliminary/Confidential
Subject to change without notice
W88227F/W88227QD
- 95 -
1999/10/1 Rev: 0.70
2.3.3 AUX_ROM Mode and uP Programming Flash
If
EAROM (CHPCON.5)
is set high, the AUX_RAM is programmed as AUX_ROM Mode that can be fetched
and executed like an internal ROM. It can be used as a self-programming ROM code source to program
external Flash Memory. In this mode, the following pins are directly controlled by its corresponding registers
to implement the flash programming function.
Pin Name
Register
Function
A7-A0
SFRFAL (C4h)
Flash low address
UP27-UP20
SFRFAH (C5h)
Flash high address
UP07-UP00
SFRFD (C6h)
Flash data
GPIO2/DAO/nFCE
UFCE (SFRCN.2)
Flash chip enable
PSEN
UFOE (SFRCN.1)
Flash output enable
GPIO1/nFWE
UFWE (SFRCN.0)
Flash write enable
Note 1:
The control bits in
SFRCN (C7h)
should be set the inverse value of its corresponding pins.
Note 2:
In the switch period from external flash memory to AUX_ROM, the Program Counter will be reset to
Zero, and uC will fetch and execute the ROM code from address 00H of AUX_ROM. Because the uP will
prefetch the ROM code before switch, for sake of the system operating smoothly, the instruction MOV
CHPCON,EAROM should will be followed by the instruction NOP to avoid the danger caused by compulsive
PC reset
.
2.3.4 Special Function Register (SFR)
The SFRs can be accessed only by direct addressing, while the on-chip RAM can be accessed by either direct or
indirect addressing. And the AUX_RAM is only accessed by MOVX instruction with selected external RAM
address range.
Address spaces 20H to 2FH to internal RAM are bit-addressable and can be used by the Boolean Variable
Manipulation instructions. For example, bit 0 of address 20H has a Boolean address 00H, and bit 7 of address
2FH has a Boolean address 7FH. The higher Boolean addresses (80H
FFH) are mapped into the SFR address
space. To determine a Boolean address in a particular bit-addressable SFR, one can combine the higher 5 bits
of the SFR address with 3 lower bits that specify the desired bit in the SFR.
相關PDF資料 |
PDF描述 |
|---|---|
| W88611P | VCD 4X RF Amplifer/Digital Servo & DSP(具有射頻運算放大器及數字信號伺服和處理的集成芯片) |
| W88631F | VCD 4X RF Amplifer/Digital Servo & DSP(具有射頻運算放大器及數字信號伺服和處理的集成芯片) |
| W89C840AF | 100/10Mbps Ethernet Controller |
| W89C841F | 3-IN - 1 10/100M FAST ETHERNET CONTROLLER |
| W89C880F | 100Base-Tx/T4 Multiport Repeater Controller(100Base-Tx/T4多端口中繼器控制器) |
相關代理商/技術參數 |
參數描述 |
|---|---|
| W88611P | 制造商:WINBOND 制造商全稱:Winbond 功能描述:VCD 4X RF AMP/DIGITAL SERVO & DSP |
| W88631F | 制造商:WINBOND 制造商全稱:Winbond 功能描述:VCD 4X RF AMP/DIGITAL SERVO & DSP |
| W88980 | 制造商:Performance Tool 功能描述:Anti-Fatigue Floor Mat Roll - 12 Square Feet 制造商:PERFORMANCE TOOLS 功能描述:ANTI-FATIGUE FLOOR MAT ROLL 12 SQ FT |
| W88981 | 制造商:Performance Tool 功能描述:Anti-Fatigue Floor Mat Roll - 32 Square Feet 制造商:PERFORMANCE TOOLS 功能描述:ANTI-FATIGUE FLOOR MAT ROLL 32 SQ FT |
| W88ACPX-1 | 制造商:Struthers-Dunn 功能描述: |
發布緊急采購，3分鐘左右您將得到回復。