T89C51CC02 Atmel, T89C51CC02 Datasheet - Page 44

• Manufacturer Part Number: T89C51CC02
• Description: 8-Bit MCU
• Manufacturer: Atmel

T89C51CC02
10.7. Hardware Byte
Default value after erasing chip: FFh
NOTE:
Only the 4 MSB bits can be access by software.
The 4 LSB bits can only be access by parallel mode.
44
Bit Number Bit Mnemonic
X2B
5-3
2-0
7
7
6
BLJB
LB2:0
BLJB
X2B
6
-
X2 Bit
Boot Loader Jump Bitt
Reserved
Lock Bits
Set this bit to start in standard mode
Clear this bit to start in X2 mode.
Clear (=1)this bit to start the user’s application on next RESET (@0000h) located in FM0,
Set (=0)this bit to start the boot loader(@F800h) located in FM1.
The value read from these bits are indeterminate.
5
-
Figure 24. Hardware byte
Preliminary
4
-
3
-
Description
LB2
2
LB1
Rev.A - May 17, 2001
1
LB0
0