参数资料
型号: SST89V58RD-33-C-PIE
厂商: Microchip Technology
文件页数: 2/92页
文件大小: 0K
描述: IC MCU 8BIT 40KB FLASH 40PDIP
标准包装: 9
系列: FlashFlex®
核心处理器: 8051
芯体尺寸: 8-位
速度: 33MHz
连通性: EBI/EMI,SPI,UART/USART
外围设备: 欠压检测/复位,POR,WDT
输入/输出数: 32
程序存储器容量: 32KB(32K x 8)
程序存储器类型: 闪存
EEPROM 大小: 8K x 8
RAM 容量: 1K x 8
电压 - 电源 (Vcc/Vdd): 2.7 V ~ 3.6 V
振荡器型: 外部
工作温度: 0°C ~ 70°C
封装/外壳: 40-DIP(0.600",15.24mm)
包装: 管件
2011 Silicon Storage Technology, Inc.
DS25087A
10/11
10
FlashFlex MCU
SST89V54RD2/RD / SST89V58RD2/RD
Not Recommended for New Designs
A Microchip Technology Company
Figure 6: Program Memory Organization for 32 KByte SST89x58RDx
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.
Table 2: 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.
T0-0.0 25087
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
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