Product introduction
Csu38m20 is an 8-bit RISC MCU with 12bit ADC and built-in 8K × 16 bit MTP program memory
High performance RISC CPU
8-bit MCU
Built in 8K × 16 bit program memory MTP
1K byte data memory (SRAM)
With 256 byte E2PROM function (10000 times)
There are only 43 single word instructions
8-level PC storage stack
8-level push and pop storage stack
oscillator
32 / 16 / 8 / 4 / 2MHz and 32kHz IRC with accuracy of ± 1% (25 ℃, 5V)
External 32768Hz crystal oscillator (RTC) or 4MHz ~ 16mhz crystal oscillator
Peripheral features
26 way bidirectional I / O port with pull-down and pull-up
3-way buzzer output, 3-way PWM output
Three groups of complementary PWM output, output drive up to 56ma
14 internal interrupts, 3 external interrupts (INT0 / INT1 / INT2)
26 input ports with wake-up function 26 + 5 channels 12bit ADC
- internal 1.4V, 2.0V, 3.0V, 4.0V, VDD
Selection of six reference voltages for external input
- support differential input
- with digital comparator
- support op amp output as ad input
1 built in analog comparator / operational amplifier (adjustable zero, branch)
With internal amplification function)
Provide one between 1.4V, 2.0V, 3.0V and 4.0V
Optional reference voltage, accuracy ± 1% (25 ℃, 5V)
Low voltage detection (LVD) pin, internal supply 2.4V
2.5V, 3.0V, 3.6V, and off chip voltage detection
Open digital filter 150us, with interrupt / reset function
8 bilateral large drive outputs, pt3.2/pt3.3
PT1.5/PT1.6/PT1.7，PT5.5/PT5.6/PT5.7
Set to large drive output, up to 56ma
Input logic level voltage can be configured, Schmidt can be configured LCD driver,
1 / 3, 1 / 4, 1 / 5DUTY, 1 / 2bias any port COM / SEG can be configured
1 / 4, 1 / 5, 1 / 6 duty, 1 / 3 bias fixed 6 COM port UART communication
One SPI (with master and slave)
I2C (master only)
Multiplier 8 * 8
Characteristics of special microcontroller
Power on reset (POR)
Power on reset and hardware reset delay timer (1ms,
10ms，49ms，98ms）
Inner band 2.0V, 2.4V, 2.5V, 3.0V, 3.6V and outer band
Low voltage reset (LVR)
Timer 0
- 8-bit programmable prescaled timing / counter
Timer / counter 2
- 12 bit programmable prescaled timing / counter
Timer / counter 3
- 12 bit programmable prescaled timing / counter
- support fractional frequency division
Enhanced timer / counter 4 supports waveform capture (PWM)
- 16 bit programmable prescaled timing / counter
Extended watchdog timer (32768Hz WDT)
- programmable time range
CMOS technology
Operating voltage range
— 2.4V~5. 5V@fcpu=4MHz (instruction cycle)
— 2.2V~5. 5V@fcpu=2MHz (instruction cycle)
Operating temperature range
- - 40 ~ 85 ° C (industrial grade)
Low power consumption characteristics
MCU working current
- normal mode 3mA@fcpu=4MHz  (working voltage 3V)
- normal mode 20uA@32KHz (working voltage 3V)
- halt mode 1.2mA (working voltage 3V)
- the current in sleep mode is less than 1 μ a
encapsulation
SOP16、SOP20 、SOP24 、SOP28、SSOP24、
SSOP28、TSSOP20、DIP20、QFN24、QFN28