AT89C5115 Atmel Corporation, AT89C5115 Datasheet - Page 23

• 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

Erase Flash
Start Bootloader
4225C–8051–03/08
•
Note:
The T89C5115 Flash memory is divided in to two blocks:
Block 0: from address 0000h to 1FFFh
Block 1: from address 2000h to 3FFFh
These two blocks contain 64 pages.
•
•
Note:
This routine allows to start at the beginning of the bootloader as after a reset. After calling this
routine the regular boot process is performed and the communication must be opened before
any action.
•
•
•
Instruction: LCALL FFF0h.
Parameter Settings
Instruction: LCALL FFF0h.
No special parameter setting
Set bit ENBOOT in AUXR1 register
instruction: LJUMP or LCALL at address F800h
1. See in the T89C5115 data sheet the time that a write operation takes.
2. No special resources are used by the bootloader during these operations
1. See the T89C5115 data sheet for the time that a write operation takes, this time must be multi-
2. No special resources are used by the bootloader during these operations
API Name
__api_wr_SSB_LEVEL2
API_name
__api_erase_block0
__api_erase_block1
plied by the number of pages.
T89C5115 UART Bootloader
R1
05h
R1
01h
DPTR0
DPTR0
0000h
2000h
FCh
DPTR1
DPTR1
x
x
x
Acc
Acc
x
x
x
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