T89C5115_08 ATMEL [ATMEL Corporation], T89C5115_08 Datasheet - Page 28

• Manufacturer Part Number: T89C5115_08
• Description: Low Pin Count 8-bit Microcontroller with A/D Converter and 16 KBytes Flash Memory
• Manufacturer: ATMEL [ATMEL Corporation]

28
AT89C5115
Table 18. AUXR1 Register
AUXR1 (S:A2h)
Auxiliary Control Register 1
Reset Value = XXXX 00X0b
Note:
Number
7 - 6
Bit
7
5
4
3
2
1
0
-
1. ENBOOT is initialized with the invert BLJB at reset. See In-System Programming
section.
Mnemonic
ENBOOT
DPS
GF3
Bit
6
0
-
-
-
-
(1)
Description
Reserved
The value read from these bits is indeterminate. Do not set these bits.
Enable Boot Flash
Set this bit to map the boot Flash between F800h -FFFFh
Clear this bit to disable boot Flash.
Reserved
The value read from this bit is indeterminate. Do not set this bit.
General Purpose Flag 3
Always Zero
This bit is stuck to logic 0 to allow INC AUXR1 instruction without affecting GF3
flag.
Reserved for Data Pointer Extension
Data Pointer Select bit
Set to select second dual data pointer: DPTR1.
Clear to select first dual data pointer: DPTR0.
ENBOOT
5
4
-
GF3
3
2
0
1
-
4128G–8051–02/08
DPS
0