參數資料
型號： SST89V58RD2-33-I-NJE
元件分類： 微控制器/微處理器
英文描述： 8-BIT, FLASH, 33 MHz, MICROCONTROLLER, PQCC44
封裝： ROHS COMPLIANT, PLASTIC, MS-018AC, LCC-44
文件頁數： 3/77頁
文件大?。?/td> 1127K
代理商： SST89V58RD2-33-I-NJE
Data Sheet
FlashFlex MCU
SST89V54RD2/RD / SST89V58RD2/RD
11
2007 Silicon Storage Technology, Inc.
S71255-10-000
12/07
FIGURE
3-2: Program Memory Organization for 32 KByte SST89x58RDx
3.2 Program Memory Block Switching
The program memory block switching feature of the device allows either Block 1 or the lowest 8 KByte of Block 0 to be
used for the lowest 8 KByte of the program address space. SFCF[1:0] controls program memory block switching.
3.2.1 Reset Configuration of Program Memory
Block Switching
Program memory block switching is initialized after reset
according to the state of the Start-up Configuration bit SC0
and/or SC1. The SC0 and SC1 bits are programmed via
an external host mode command or an IAP Mode com-
mand. See Table 4-2.
Once out of reset, the SFCF[0] bit can be changed dynam-
ically by the program for desired effects. Changing SFCF[0]
will not change the SC0 bit.
1255 F03.0
External
64 KByte
EA# = 0
FFFFH
0000H
32 KByte
Block 0
EA# = 1
SFCF[1:0] = 10, 11
FFFFH
0000H
24 KByte
Block 0
8 KByte
Block 1
8 KByte
Block 1
EA# = 1
SFCF[1:0] = 00
FFFFH
2000H
7FFFH
8000H
DFFFH
E000H
DFFFH
E000H
7FFFH
8000H
0000H
1FFFH
External
24 KByte
8 KByte
Block 1
External
24 KByte
External
32 KByte
EA# = 1
SFCF[1:0] = 01
FFFFH
7FFFH
8000H
0000H
32 KByte
Block 0
TABLE
3-1: SFCF Values for Program Memory Block Switching
SFCF[1:0]
Program Memory Block Switching
10, 11
Block 1 is not visible to the PC;
Block 1 is reachable only via in-application programming from E000H - FFFFH.
01
Both Block 0 and Block 1 are visible to the PC.
Block 0 is occupied from 0000H - 7FFFH. Block 1 is occupied from E000H - FFFFH.
00
Block 1 is overlaid onto the low 8K of the program address space; occupying address locations 0000H -
1FFFH.
When the PC falls within 0000H - 1FFFH, the instruction will be fetched from Block 1 instead of Block 0.
Outside of 0000H - 1FFFH, Block 0 is used. Locations 0000H - 1FFFH of Block 0 are reachable through
in-application programming.
T3-1.0 1255
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相關代理商/技術參數
參數描述
SST89V58RD2-33-I-NJE1 制造商:SST 制造商全稱:Silicon Storage Technology, Inc 功能描述:FlashFlex51 MCU
SST89V58RD2-33-I-NJF2 制造商:SST 制造商全稱:Silicon Storage Technology, Inc 功能描述:FlashFlex51 MCU
SST89V58RD2-33-I-PI 制造商:SST 制造商全稱:Silicon Storage Technology, Inc 功能描述:FlashFlex51 MCU
SST89V58RD2-33-I-PIE1 制造商:SST 制造商全稱:Silicon Storage Technology, Inc 功能描述:FlashFlex51 MCU
SST89V58RD2-33-I-PIF2 制造商:SST 制造商全稱:Silicon Storage Technology, Inc 功能描述:FlashFlex51 MCU
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