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參數(shù)資料
| 型號： | T89C51RD2-SMUCM |
| 廠商： | TEMIC SEMICONDUCTORS |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 0 to 40 MHz Flash Programmable 8-bit Microcontroller |
| 中文描述： | 8-BIT, FLASH, 40 MHz, MICROCONTROLLER, PQCC68 |
| 封裝： | PLASTIC, LCC-68 |
| 文件頁數(shù)： | 51/104頁 |
| 文件大?。?/td> | 798K |
| 代理商： | T89C51RD2-SMUCM |
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51
T89C51RD2
4243G
–
8051
–
05/03
Read Data
The following procedure is used to read the data store in the EEPROM memory:
Map the program space (Set bit EEE of EECON register)
Load DPTR with the address to read
Execute a MOVX A, @DPTR
Example : ... ; DPTR = EEPROM data pointer
MOV EECON,#02h ; EEE=1 EEPROM mapped
MOVX A,@DPTR ; Read data from EEPROM
... ; A = Data
Registers
Table 32.
EECON Register
EECON (S:
0D2
h)
EEPROM Control Register
Reset Value = XXXX XX00b
7
6
5
4
3
2
1
0
EEPL3
EEPL2
EEPL1
EEPL0
-
-
EEE
EEBUSY
Bit Number
Bit
Mnemonic
Description
7-4
EEPL3-0
Programming Launch command bits
Write 5Xh followed by AXh to EECON to launch the programming.
3
-
Not implemented, reserved for future use.
(1)
1.
User software should not write 1s to reserved bits. These bits may be used in future 8051
family products to invoke new features. In that case, the reset or inactive value of the
new bit will be 0, and its active value will be 1. The value read from a reserved bit is
indeterminate.
User software should not write 1s to reserved bits. These bits may be used in future 8051
family products to invoke new features. In that case, the reset or inactive value of the
new bit will be 0, and its active value will be 1. The value read from a reserved bit is
indeterminate.
2
-
Not implemented, reserved for future use.
(2)
2.
1
EEE
Enable EEPROM Space bit
Set to map the EEPROM space during MOVX instructions (Write in the column
latches)
Clear to map the data space during MOVX.
0
EEBUSY
Programming Busy flag
Set by hardware when programming is in progress.
Cleared by hardware when programming is done.
Can not be set or cleared by software.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| T89C51RD2-SMUIM | 0 to 40 MHz Flash Programmable 8-bit Microcontroller |
| T8 | 8A TRIACS |
| T810-600R | 8A TRIACS |
| T810-600R-TR | 8A TRIACS |
| T810-800R | 8A TRIACS |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| T89C51RD2-SMUC-M | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:0 to 40MHz Flash Programmable 8-bit Microcontroller |
| T89C51RD2-SMUI-L | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:0 to 40MHz Flash Programmable 8-bit Microcontroller |
| T89C51RD2-SMUIM | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:0 to 40 MHz Flash Programmable 8-bit Microcontroller |
| T89C51RD2-SMUI-M | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:0 to 40MHz Flash Programmable 8-bit Microcontroller |
| T89C51RD2-SMVC-L | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:0 to 40MHz Flash Programmable 8-bit Microcontroller |
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