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参数资料
| 型号： | SST89E54RD2A-40-C-TQJE |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 8-BIT, FLASH, 40 MHz, MICROCONTROLLER, PQFP44 |
| 封装： | ROHS COMPLIANT, MS-026ACB, TQFP-44 |
| 文件页数： | 33/78页 |
| 文件大小： | 1671K |
| 代理商： | SST89E54RD2A-40-C-TQJE |
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Data Sheet
FlashFlex MCU
SST89E54RD2A/RDA / SST89E58RD2A/RDA
39
2008 Silicon Storage Technology, Inc.
S71339-02-000
02/08
4.2.4.7 Prog-SC0, Prog-SC1
Prog-SC0 command is used to program the SC0 bit. This
command only changes the SC0 bit and has no effect on
BSEL bit until after a reset cycle.
SC0 bit previously in un-programmed state can be pro-
grammed by this command. The Prog-SC0 command
should reside only in Block 1 or external code memory.
Prog-SC1 command is used to program the SC1 bit. This
command only changes the SC1 bit and has no effect on
SFCF[1] bit until after a reset cycle.
SC1 bit previously in un-programmed state can be pro-
grammed by this command. The Prog-SC1 command
should reside only in Block 1 or external code memory.
FIGURE
4-7: Prog-SC0 and Prog-SC1
4.2.4.8 Enable-Clock-Double
Enable-Clock-Double command is used to make the MCU
run at 6 clocks per machine cycle. The standard (default) is
12 clocks per machine cycle (i.e. clock double command
disabled).
FIGURE
4-8: Enable-Clock-Double
4.2.5 Polling
A command that uses the polling method to detect flash
operation completion should poll on the FLASH_BUSY bit
(SFST[2]). When FLASH_BUSY de-asserts (logic 0), the
device is ready for the next operation.
MOVC instruction may also be used for verification of the
Programming and Erase operation of the flash memory.
MOVC instruction will fail if it is directed at a flash block that
is still busy.
4.2.6 Interrupt Termination
If interrupt termination is selected, (SFCM[7] is set), then
an interrupt (INT1) will be generated to indicate flash opera-
tion completion. Under this condition, the INT1 becomes an
internal interrupt source. The INT1# pin can now be used
as a general purpose port pin and it cannot be the source
of External Interrupt 1 during in-application programming.
In order to use an interrupt to signal flash operation termi-
nation. EX1 and EA bits of IE register must be set. The IT1
bit of TCON register must also be set for edge trigger
detection.
Program SC0 or SC1 -
Interrupt scheme
MOV SFCM, #89H
Program SC0 or SC1 -
Polling scheme
MOV SFCM, #09H
INT1# Interrupt
indicates completion
Polling SFST[2]
indicates completion
1339 F14.0
IAP Enable
ORL SFCF, #40H
Set-up Program SC1
MOV SFAH, #0AAH
MOV SFDT, #0AAH
Set-up Program SC0
MOV SFAH, #5AH
MOV SFDT, #0AAH
Program
Enable-Clock-Double
Interrupt scheme
MOV SFCM, #88H
Program
Enable-Clock-Double
Polling scheme
MOV SFCM, #08H
INT1# Interrupt
indicates completion
Polling SFST[2]
indicates completion
1339 F15.0
IAP Enable
ORL SFCF, #40H
Set-up Enable-Clock-Double
MOV SFAH, #55H
MOV SFDT, #0AAH
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相关代理商/技术参数 |
参数描述 |
|---|---|
| SST89E54RD2A-40-C-TQJE-T | 功能描述:8位微控制器 -MCU 4.5-5.5V FL Flex 8B 8051 Microcontroller RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT |
| SST89E54RD2RD | 制造商:SST 制造商全称:Silicon Storage Technology, Inc 功能描述:FlashFlex51 MCU |
| SST89E54RD2-RD | 制造商:SST 制造商全称:Silicon Storage Technology, Inc 功能描述:FlashFlex51 MCU |
| SST89E54RD-33-C-PIE | 功能描述:8位微控制器 -MCU 24KB+1KB 33MHz RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT |
| SST89E54RD-40-C-PI | 制造商:SST 制造商全称:Silicon Storage Technology, Inc 功能描述:FlashFlex51 MCU |
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