AT89LP51RD2 Atmel Corporation, AT89LP51RD2 Datasheet - Page 200

• Manufacturer Part Number: AT89LP51RD2
• Manufacturer: Atmel Corporation

Specifications of AT89LP51RD2

• Flash (kbytes): 64 Kbytes
• Max. Operating Frequency: 20 MHz
• Cpu: 8051-1C
• Max I/o Pins: 42
• Spi: 1
• Twi (i2c): 1
• Uart: 1
• Adc Channels: 7
• Adc Resolution (bits): 10
• Adc Speed (ksps): 153.8
• Sram (kbytes): 2.25
• Self Program Memory: API
• Operating Voltage (vcc): 2.4 to 5.5
• Timers: 4
• Isp: SPI/OCD/UART
• Watchdog: Yes

Table 24-10. FCON – Flash Control Register
24.5
200
FCON Address = 0D1H
Not Bit Addressable
Symbol
FPL
FPS
FMOD
FBUSY
Bit
3-0
1-0
Bootloader
AT89LP51RD2/ED2/ID2 Preliminary
FPL3
Function
Programming Launch Command Bits
Write 5Xh followed by AXh to launch the programming according to FMOD
Flash Map Program Space
Set this bit to direct the MOVX @DPTR, A and MOVX @/DPTR, A instructions to the Flash memory temporary page
buffer. Clear to allow MOVX to write regular data memory.
Flash Mode
Mode
Flash Busy
Set by hardware when programming is in progress. Cleared by hardware when programming is done. Cannot be
changed by software.
7
0
1
2
3
FMOD1
FPL2
The Bootloader is a ROM-based application that provides the following features:
The bootloader manages communication according to a specifically defined protocol to provide
the whole access and service on Flash memory. Furthermore, all accesses and routines can be
called from the user application.
0
0
1
1
6
• Flash EEPROM Internal Program Memory
• Boot vector allows user provided Flash loader code to reside anywhere in the Flash memory
• Default loader in Boot ROM allows programming via the serial port without the need of a user
• Programming and erasing voltage with standard power supply
• Read/Programming/Erase:
• Typical programming time (64K bytes) is 22s with on chip serial bootloader
• Programmable security for the code in the Flash
• 100K write cycles
• 10 years data retention
space. This configuration provides flexibility to the user.
provided loader.
– Byte-wise read without wait state
– Byte or page erase and programming (10 ms)
FMOD0
0
1
0
1
FPL1
5
Memory Operation Target
CODE space (0000–FFFFH)
User Signature space (0000–01FFH)
Atmel Signature space (0200–027FH read-only)
User Fuse space (0000–007FH)
Hardware Security space (0080–00FFH read-only)
Reserved
FPL0
4
FPS
3
FMOD1
1-0
2
.
Reset Value = xxxx 000xB
FMOD0
1
FBUSY
0
3714A–MICRO–7/11