參數(shù)資料
型號(hào): HMS99C51S
廠商: Electronic Theatre Controls, Inc.
英文描述: 8-BIT SINGLE-CHIP MICROCONTROLLERS WITH EMBEDDED FLASH
中文描述: 8位單片機(jī)與嵌入式閃存微控制器
文件頁數(shù): 50/73頁
文件大?。?/td> 696K
代理商: HMS99C51S
HMS99C51S/52S/54S/56S/58S
46
Sep. 2004 Ver 1.01
Flash Registers and Memory Map
The HMS99C51S/52S/54S/56S/58S Flash memory uses several registers for its management:
Hardware registers can only be accessed through the parallel programming modes which are han-
dled by the parallel programmer.
Hardware Register
The only hardware register of the HMS99C51S/52S/54S/56S/58S is called Hardware Security Byte(HSB).
1 : Unprogrammed
0 : Programmed
Note:
HSB can be read but can not be programmed in ISP Mode and only programmable by specific tools.
-
-
-
BLJB_EN
BLJB
LB2
LB1
LB0
Table 13. Hardware Security Byte(HSB)
Bit No
Bit Mnemonic
Description
7~5
-
Reserved
4
BLJN_EN
Enable BLJB Bit
1 : BLJB is enabled for ISP Mode
0 : BLJB is disabled. (After finishing of download, must be programmed.)
3
BLJB
Boot Loader Jump Bit
1 : Start the user’s application on next reset at address 0000
H
0 : Start the boot loader at address F800
H
(Default).
2~0
LB2~0
User Memory Lock Bits
See Table 14
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