AT89C5115 Atmel Corporation, AT89C5115 Datasheet - Page 48

• Manufacturer Part Number: AT89C5115
• Manufacturer: Atmel Corporation

Specifications of AT89C5115

• Flash (kbytes): 16 Kbytes
• Max. Operating Frequency: 40 MHz
• Cpu: 8051-12C
• Max I/o Pins: 20
• Uart: 1
• Adc Channels: 8
• Adc Resolution (bits): 10
• Adc Speed (ksps): 62.5
• Sram (kbytes): 0.5
• Eeprom (bytes): 2048
• Self Program Memory: API
• Operating Voltage (vcc): 3.0 to 5.5
• Timers: 4
• Isp: UART
• Watchdog: Yes

Hardware Security Byte
48
AT89C5115
Table 31. Hardware Security byte
After erasing the chip in parallel mode, the default value is : FFh
The erasing in ISP mode (from bootloader) does not modify this byte.
Notes:
Number
X2B
5 - 3
2 - 0
Bit
7
7
6
1. Only the 4 MSB bits can be accessed by software.
2. The 4 LSB bits can only be accessed by parallel mode.
Mnemonic Description
BLJB
LB2:0
BLJB
X2B
Bit
6
-
X2 bit
Set this bit to start in standard mode
Clear this bit to start in X2 Mode.
Boot Loader Jump bit
- 1: To start the user’s application on next RESET (@0000h) located in FM0,
- 0: To start the boot loader(@F800h) located in FM1.
Reserved
The value read from these bits are indeterminate.
Lock bits (see Table 22)
5
-
4
-
3
-
LB2
2
LB1
1
4128G–8051–02/08
LB0
0