AT89C5115 Atmel Corporation, AT89C5115 Datasheet - Page 7

• 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

T89C5115 UART Bootloader
Figure 3. Regular Boot Process
Bit ENBOOT in AUXR1 Register is
RESET
Initialized with BLJB Inverted
ENBOOT = 0
Yes
PC = 0000h
BLJB = 1
ENBOOT = 1
PC = F800h
No
No
Yes
P1_CF = FFh
No
No
Yes
P1_CF = P1
P3_CF = FFh
Yes
No
P3_CF = P3
No
Yes
P4_CF = FFh
Yes
No
P4_CF = P4
Yes
BSB = 0
Yes
No
No
SBV < 3Fh
Yes
Start Application
Start User Bootloader
Start Bootloader
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4225C–8051–03/08