AT89C5115 Atmel Corporation, AT89C5115 Datasheet - Page 14

• 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

Example
Program
Configuration
Information
Requests from Host
Answers from
Bootloader
14
T89C5115 UART Bootloader
The flow described below allows the user to program Configuration Information regarding the
bootloader functionality.
The Boot Process Configuration:
Note:
The bootloader answers with:
•
•
•
–
–
–
–
–
–
‘.’ & ‘CR’ & ’LF’ when the value is programmed
‘X’ & ‘CR’ & ‘LF’ if the checksum is wrong
‘P’ & ‘CR’ & ‘LF’ if the Security is set
BSB
SBV
P1_CF, P3_CF, P4_CF
Fuse bits (BLJB and X2 bits) (see Section “Mapping and Default Value of Hardware
Security Byte”)
SSB
EB
1. The field ’Load Offset’ is not used.
2. To program the BLJB and X2 bit the ’bit value’ is 00h or 01h.
Display data from address 0000h to 0020h
Program SSB level1
Program SSB level2
BOOT LOADER
BOOT LOADER
BOOT LOADER
Command Name
HOST
BOOT LOADER
Erase SBV & BSB
Program bit BLJB
Program P1_CF
Program P3_CF
Program P4_CF
Program bit X2
Program BSB
Program SBV
Program EB
0000=-----data------ CR LF
0010=-----data------ CR LF
0020=data CR LF
: 05 0000 04 0000 0020 00 D7
: 05 0000 04 0000 0020 00 D7
Record
Type
03h
Offset
Load
x
Record
Length
02h
02h
03h
03h
(16 data)
(16 data)
( 1 data)
Data[0]
0Ah
04h
05h
06h
Data[1]
00h
00h
01h
00h
01h
02h
03h
04h
06h
04h
08h
4225C–8051–03/08
Data[2]
bit value
value
-
-
-