參數(shù)資料
型號(hào)： SST89C58-33-I-TQJE
廠商： SILICON STORAGE TECHNOLOGY INC
元件分類： 微控制器/微處理器
英文描述： 8-BIT, FLASH, 33 MHz, MICROCONTROLLER, PQFP44
封裝： LEAD FREE, TQFP-44
文件頁(yè)數(shù)： 2/52頁(yè)
文件大小： 967K
代理商： SST89C58-33-I-TQJE
10
Data Sheet
FlashFlex51 MCU
SST89C54 / SST89C58
2004 Silicon Storage Technology, Inc.
S71131-04-000
6/04
3.0 MEMORY ORGANIZATION
The SST89C54/58 has separate address spaces for pro-
gram and data memory.
3.1 Program Flash Memory
There are two internal flash memory blocks in the
SST89C54/58. The primary flash memory Block 0 has
16/32 KByte and occupies the address space 0000H to
3FFFH/7FFFH. The secondary flash memory Block 1
has 4 KByte and occupies the address space F000H to
FFFFH.
The 16/32K x8 primary flash block is organized into 128/
256 sectors. Each sector contains 2 rows and each row
has 64 Bytes.
The 4K x8 secondary flash block is organized into 64 sec-
tors. Each sector contains 2 rows. Each row contains 32
Bytes. Figure 3-1 shows the sector organization for
SST89C54/58.
When internal code operation is enabled (EA# = 1), the pri-
mary 16/32 KByte flash memory block is always visible to
the program counter for code fetching. Figures 3-2 and 3-3
show
the
program
memory
organizations
for
the
SST89C54/58.
When internal code operation is enabled (EA# = 1), the
secondary 4 KByte flash memory block is selectively visi-
ble for code fetching. When bit 7 of the SuperFlash Con-
figuration
mailbox
register
(SFCF[7]),
is set,
the
secondary 4 KByte block will be visible for code fetching.
3.1.1 Code Corruption Due to Brown-out
The MCU will still run a user’s application code even if the
VDD drops down to 2V, far below the minimum working volt-
age of 2.7V. This can cause the program counter (PC) to
get lost and sometimes lead to code corruption. The solu-
tion is to use an off-chip voltage supervisory chip to keep
the MCU in reset state whenever the VDD drops below
2.7V.
FIGURE
3-1: SECTOR ORGANIZATION
7FFFH
7F80H
4000H
3FFFH
0000H
Block 0 (16/32 KByte)
1131 F02.0
Sector 255
Sector 127
Sector 0
3F80H
007FH
FFFFH
FFC0H
F03FH
Block 1 (4 KByte)
Primary
Secondary
Sector 63
Sector 0
F000H
89C58
89C54
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SST89C58RC-40-I-NJE 制造商:Microchip Technology Inc 功能描述:8 BIT MICROCONTROLLER WITH 40K - Rail/Tube 制造商:Microchip Technology Inc 功能描述:Microchip SST89C58RC-40-I-NJE Microcontrollers (MCU)
SST89C58RC-40-I-QIF 功能描述:8位微控制器 -MCU 40K (32Kx8K) SM-Bus 40MHz 2.7-5.5V 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(shí)鐘頻率:50 MHz 程序存儲(chǔ)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
SST89C58RC-40-I-TQJE 功能描述:8位微控制器 -MCU 40K (32Kx8K) SM-Bus 40MHz 2.7-5.5V 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(shí)鐘頻率:50 MHz 程序存儲(chǔ)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
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