FEATURES1. Standard 8051 Instruction set, fast machine cycle
Executes instructions six times faster than the standard 8051.
2. Flash Program Memory
8K Bytes (TM52FN8274/78)
16K Bytes (TM52FN8273/76)
Support “In Circuit Programming” (ICP) or “In System Programming” (ISP) for the Flash code
Byte Write “In Application Programming” (IAP) mode is convenient as Data EEPROM access
Code Protection Capability
Built-in Watchdog Timer for escape the write fail state
10K erase times at least
10 years data retention at least
3. 128 Bytes EEPROM Memory
50K erase times at least
10 years data retention at least
4. Total 1024 Bytes SRAM (IRAM + XRAM)
256 Bytes IRAM in the 8051 internal data memory area
768 Bytes XRAM in the 8051 external data memory area (accessed by MOVX Instruction)
5. Four System Clock type selections
Fast clock from 1~16MHz Crystal (FXT)
Fast clock from Internal RC (FRC, 14.7456 MHz)
Slow clock from 32768Hz Crystal (SXT)
Slow clock from Internal RC (SRC, 80 KHz)
System Clock can be divided by 1/2/4/16 option
6. 8051 Standard Timer – Timer0/1/2
16-bit Timer0, also supports T0O clock output for Buzzer application
16-bit Timer1
16-bit Timer2, also supports T2O clock output for Buzzer application
7. 15-bit Timer3
Clock source is Slow clock
Interrupt period can be clock divided by 32768/16384/8192/4096/2048/1024/512/256 option
8. UARTs
UART1, 8051 standard UART, One Wire UART option can be used for ISP or other application
UART2, the second UART, supports only mode1 and mode3
9. Three independent "8+2" bits PWMs with prescaler/ period-adjustment
10. SPI Interface
Master or Slave mode selectable
Programmable transmit bit rate
Serial clock phase and polarity options
MSB-first or LSB-first selectable
11. 19-Channel Touch Key (FN8276/78 only)
Internal reference key
Touch Key clock Auto-change
12. 12-bit ADC with 14 channels External Pin Input and 2 channels Internal Reference Voltage
Internal Reference Voltage (VBG): 1.20V±1%@VCC=5V~3V, 25℃
Internal Reference Voltage: Vcc/4
ADC reference voltage = 2.5V / VCC
13. LCD Driver
Software controlled COM00~07, COM10~17, COM20~21, COM30~37 (Max. 26 pins)
1/2 LCD Bias
14. LED Controller/Driver
New Matrix mode function
Max. 10 pins (4 COM x 4 SEG ~ 4 COM x 6 SEG)
COM with Dead Time
3groups, 8-level Brightness with smooth option
LED hold function
15. 12 Sources, 4-level priority Interrupt
Timer0/Timer1/Timer2/Timer3 Interrupt
INT0/INT1 pin Falling-Edge/Low-Level Interrupt
P1.0~P1.3 Pin Change Interrupt
UART1/UART2 TX/RX Interrupt
P3.7 (INT2) pin Interrupt
ADC/Touch Key Interrupt
SPI Interrupt
16. Pin Interrupt can Wake up CPU from Power-Down (Stop) mode
P3.2/P3.3 (INT0/INT1) Interrupt & Wake-up
P3.7 (INT2) Interrupt & Wake-up
P1.0~P1.3 pin can be defined as Interrupt & Wake-up pin (by pin change)
17. Max. 26 Programmable I/O pins
CMOS Output
Pseudo-Open-Drain, or Open-Drain Output
Schmitt Trigger Input
Pin Pull-up can be Enabled or Disabled
All pin with High sink (80mA@VCC=5V，VOL=0.1VCC)
18. Independent RC Oscillating Watch Dog Timer
400ms/200ms/100ms/50ms selectable WDT timeout options
19. Five types Reset
Power on Reset
Selectable External Pin Reset
Selectable Watch Dog Reset
Software Command Reset
Selectable Low Voltage Reset
20. 8-level Low Voltage Reset
2.2V/2.5V/2.8V/3.1V/3.4V/3.7V/4.0V/4.3V (can be disabled)
21. Five Power Operation Modes
Fast/Slow/Idle/Stop/Halt mode
22. Integrated 16-bit Cyclic Redundancy Check function
23. On-chip Debug/ICE interface
Use P3.0/P3.1 pin or P0.0/P0.1 pin
Share with ICP programming pin
24. Operating Voltage and Current
VCC = 2.2V ~ 5.5V @FSYSCLK=14.7456 MHz (-40℃ ~ 85℃)
ICC = 0.1µA @Stop mode, PWRSAV=1, VCC=3V
ICC = 5.5µA @Halt mode, PWRSAV=1, VCC=3V
ICC = 16µA @Idle mode, PWRSAV=1, VCC=3V
25. Operating Temperature Range
–40°C ~ +85°C
26. Package Types
28-pin SOP (300 mil)
28-pin SSOP (150 mil)
28-pin QFN (4x4x0.75-0.4mm)
24-pin SSOP (150 mil)
20-pin SOP (300 mil)
20-pin QFN (3x3x0.75-0.4mm) (L=0.25mm)
16-pin SOP (150 mil)