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CSU34F20
CSU34F20 is an 8-bit CMOS single-chip Flash MCU with LED drive and 12-bit ADC, built-in 4K×16-bit FLASH program memory.
High-performance RISC CPU
8-bit OTP MCU
Built-in 4K×16-bit program memory FLASH
488-byte data memory (SRAM)
43 single-word instructions
8-level PC memory stack
8-level PUSH and POP stacks
Support in-circuit emulation (ICD)
Built-in 4K×16-bit program memory FLASH
488-byte data memory (SRAM)
43 single-word instructions
8-level PC memory stack
8-level PUSH and POP stacks
Support in-circuit emulation (ICD)
Oscillator
Built-in 32MHz oscillator, with the accuracy of ±1%@5V, 25℃
Peripheral features
19-bit bidirectional I/O port
3 PWM output, 1 complementary PWM output
10 interrupt sources
- 8 internal interrupts
- 2 external interrupts - INT0, INT1
14 input ports with wake-up feature
LED drive
- 8COM×7SEG LED drive, duty cycle adjustable
- SED drive capability 8/10/12/14mA, accuracy ±5%
- COM sink current 70mA/40mA
12-bit ADC
- 8 external input channels, support differential/single-ended input
Two reference voltage options: internal 1.22V & VDD
Internal voltage reference
- 1.22V internal voltage reference, accuracy ±1% (5V)
- Support voltage reference output, load 10K/100pF
Low voltage reset (LVR) function,
- Reset voltage: 1.7V, 2.0V, 2.5V
Low voltage detection (LVD) function
- Detection voltage: 1.9V, 2.2V, 3.2V, 3.7V
- Comparator function, comparison between external input and internal 0.6V
POR power-on reset voltage 1.8V
PT1.3 supports open-drain output port
PT1.5 and PT1.4 output current configurable, up to IOL=60mA@5V, IOH=25mA@5V
Configurable input logic level voltage
1-channel UART, max baud rate support 115,200
1 × I2C slave, support standard mode (100kbps) and fast mode (400kbps)
3 PWM output, 1 complementary PWM output
10 interrupt sources
- 8 internal interrupts
- 2 external interrupts - INT0, INT1
14 input ports with wake-up feature
LED drive
- 8COM×7SEG LED drive, duty cycle adjustable
- SED drive capability 8/10/12/14mA, accuracy ±5%
- COM sink current 70mA/40mA
12-bit ADC
- 8 external input channels, support differential/single-ended input
Two reference voltage options: internal 1.22V & VDD
Internal voltage reference
- 1.22V internal voltage reference, accuracy ±1% (5V)
- Support voltage reference output, load 10K/100pF
Low voltage reset (LVR) function,
- Reset voltage: 1.7V, 2.0V, 2.5V
Low voltage detection (LVD) function
- Detection voltage: 1.9V, 2.2V, 3.2V, 3.7V
- Comparator function, comparison between external input and internal 0.6V
POR power-on reset voltage 1.8V
PT1.3 supports open-drain output port
PT1.5 and PT1.4 output current configurable, up to IOL=60mA@5V, IOH=25mA@5V
Configurable input logic level voltage
1-channel UART, max baud rate support 115,200
1 × I2C slave, support standard mode (100kbps) and fast mode (400kbps)
Features of dedicated microcontroller
Power-on reset (POR)
Power-on reset and hardware reset delay timer (30ms)
Built-in low voltage reset (LVR)
Timer 0
- 8-bit programmable prescale timer/counter
Timer/counter 2
- 12-bit programmable prescale timer/counter
Timer/counter 3
- 12-bit programmable prescale timer/counter
Timer/counter 4
- 12-bit programmable prescale timer/counter
Extended watch dog timer (32K WDT)
- Programmable time range
Window watch dog timer (CPU clock)
- 7-bit down counter, once enabled, software cannot be closed
Power-on reset and hardware reset delay timer (30ms)
Built-in low voltage reset (LVR)
Timer 0
- 8-bit programmable prescale timer/counter
Timer/counter 2
- 12-bit programmable prescale timer/counter
Timer/counter 3
- 12-bit programmable prescale timer/counter
Timer/counter 4
- 12-bit programmable prescale timer/counter
Extended watch dog timer (32K WDT)
- Programmable time range
Window watch dog timer (CPU clock)
- 7-bit down counter, once enabled, software cannot be closed
CMOS technology
Voltage operating range
- 2.3V~5.5V@fcpu=4MHz (Instruction cycle)
- 1.8V~2.4V@fcpu=2MHz (Instruction cycle)
Operating temperature range
- 2.3V~5.5V@fcpu=4MHz (Instruction cycle)
- 1.8V~2.4V@fcpu=2MHz (Instruction cycle)
Operating temperature range
Low power consumption feature
MCU operating current
- Normal mode 3.5mA@4MHz,5V
- Sleep mode 3uA
- Normal mode 3.5mA@4MHz,5V
- Sleep mode 3uA
Encapsulation
QFN20/SSOP24/SOP16
Scope of application
Personal care appliances and e-cigarettes
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CSU-IDE V6.0.3
chipsea8-bit MCU/SOC integrated development environment
1. Integrate C compiler, assembler, linker, window
2. Support standard C language and assembly language development 3. Integrate the chip sample code