參數資料
型號： SST89E54RC-33-C-NJE
廠商： Microchip Technology
文件頁數： 70/71頁
文件大?。?/td> 0K
描述： IC MCU 8BIT 17KB FLASH 44PLCC
標準包裝： 26
系列： FlashFlex®
核心處理器： 8051
芯體尺寸： 8-位
速度： 33MHz
連通性： EBI/EMI，UART/USART
外圍設備： POR，WDT
輸入/輸出數： 32
程序存儲器容量： 16KB（16K x 8）
程序存儲器類型： 閃存
EEPROM 大?。?/td> 1K x 8
RAM 容量： 512 x 8
電壓 - 電源 (Vcc/Vdd)： 4.5 V ~ 5.5 V
振蕩器型： 外部
工作溫度： 0°C ~ 70°C
封裝/外殼： 44-LCC（J 形引線）
包裝： 管件
2011 Silicon Storage Technology, Inc.
DS25088A
10/11
8
FlashFlex MCU
SST89E52RC / SST89E54RC
Data Sheet
A Microchip Technology Company
Memory Organization
The device has separate address spaces for program and data memory.
Program Flash Memory
There are two internal flash memory partitions in the device. The primary flash memory partition (Par-
tition 0) has 16/8 KByte. The secondary flash memory partition (Partition 1) has 1 KByte. The total
flash memory space of both partitions can be used as a contiguous code storage.
The 16K/8K x8 primary flash partition is organized as 128/64 sectors, each sector consists of 128
Bytes. The primary partition is divided into four logical pages as shown in Figure 5
The 1K x8 secondary flash partition is organized as 8 sectors, each sector consists also of 128 Bytes.
For both partitions, the 7 least significant program address bits select the byte within the sector. The
remainder of the program address bits select the sector within the partition.
Data RAM Memory
The data RAM has 512 Bytes of internal memory. The first 256 Bytes are available by default. The sec-
ond 256 Bytes are enabled by clearing the EXTRAM bit in the AUXR register. The RAM can be
addressed up to 64 KByte for external data memory.
Expanded Data RAM Addressing
The SST89E5xRC have the capability of 512 Bytes of RAM. See Figure 4.
The device has four sections of internal data memory:
1.
The lower 128 Bytes of RAM (00H to 7FH) are directly and indirectly addressable.
2.
The higher 128 Bytes of RAM (80H to FFH) are indirectly addressable.
3.
The special function registers (80H to FFH) are directly addressable only.
4.
The expanded RAM of 256 Bytes (00H to FFH) is indirectly addressable by the move
external instruction (MOVX) and clearing the EXTRAM bit. (See “Auxiliary Register
(AUXR)” in Section , “Special Function Registers”)
Since the upper 128 bytes occupy the same addresses as the SFRs, the RAM must be accessed indi-
rectly. The RAM and SFRs space are physically separate even though they have the same addresses.
When instructions access addresses in the upper 128 bytes (above 7FH), the MCU determines
whether to access the SFRs or RAM by the type of instruction given. If it is indirect, then RAM is
accessed. If it is direct, then an SFR is accessed. See the examples below.
Indirect Access:
MOV@R0, #data; R0 contains 90H
Register R0 points to 90H which is located in the upper address range. Data in “#data” is written to
RAM location 90H rather than port 1.
Direct Access:
MOV90H, #data; write data to P1
Data in “#data” is written to port 1. Instructions that write directly to the address write to the SFRs.
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相關代理商/技術參數
參數描述
SST89E54RC-33-C-PIE 功能描述:8位微控制器 -MCU 8-Bit 16K+1K Flash 33MHz 3/16-Bit Timer RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數據總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數據 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 安裝風格:SMD/SMT
SST89E54RD 制造商:SST 制造商全稱:Silicon Storage Technology, Inc 功能描述:FlashFlex MCU
SST89E54RD2 制造商:SST 制造商全稱:Silicon Storage Technology, Inc 功能描述:FlashFlex51 MCU
SST89E54RD2/RD 制造商:SST 制造商全稱:Silicon Storage Technology, Inc 功能描述:FlashFlex51 MCU
SST89E54RD2-33-C-NI 制造商:SST 制造商全稱:Silicon Storage Technology, Inc 功能描述:FlashFlex51 MCU
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