CSWrite V3.2.4
CSWriterUx V3.2.4 is the latest burning tool software of Core Sea Technology. Support core sea 8bit MCU, 32bit MCU.
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CSU18M91
Main application scenarios: Body fat scales and heart rate & body fat scales
CSU18M91 is an SoC that supports 4-pole AC fat measurement, heart rate measurement, and high-precision body weighing. The chip includes a body impedance measurement (BIM) module, a 24-bit Sigma-Delta ADC, an 8K x 16-bit MTP program memory, 128-byte EEPROM, and an 896-byte data memory.
High-performance RISC CPU
8-bit single-chip MCU
Built-in 8K x 16-bit one-time programmable memory (MTP ROM) and 128-byte EEPROM
896-byte data memory (SRAM)
Only 46 single-word instructions
8-level memory stack
Built-in 8K x 16-bit one-time programmable memory (MTP ROM) and 128-byte EEPROM
896-byte data memory (SRAM)
Only 46 single-word instructions
8-level memory stack
Analog features
1 input fully differential 24-bit Sigma-Delta ADC, supports 1/64/128x gain
10-bit SAR ADC with 6 external channels and 2 internal channels
4-electrode AC body impedance measurement (BIM) module
ADC output rate: 15.2 Hz–3.9 kHz
Internal charge pump
Internal voltage regulator for sensors and modulators
Internally integrated programmable gain amplifier
10-bit SAR ADC with 6 external channels and 2 internal channels
4-electrode AC body impedance measurement (BIM) module
ADC output rate: 15.2 Hz–3.9 kHz
Internal charge pump
Internal voltage regulator for sensors and modulators
Internally integrated programmable gain amplifier
Features of the dedicated microcontroller
Power-on reset (POR)
Power-on reset delay timer (39 ms)
Internal low voltage reset (LVR)
Timer 0
—Programmable pre-scaled 8-bit timer
Timer/counter 1/2/3
—Programmable pre-scaled 8-bit timer/counter
Power-on reset delay timer (39 ms)
Internal low voltage reset (LVR)
Timer 0
—Programmable pre-scaled 8-bit timer
Timer/counter 1/2/3
—Programmable pre-scaled 8-bit timer/counter
Peripheral features
31-bit bi-directional I/O ports, including PT2.1–PT2.4, PT3*, and PT4*, which are also used as LCD/LED ports
13 input ports with wake-up function
2 UARTs. Up to 115,200 bps baud rate
1 I2C slave, supports standard mode (100K bit/s) and fast mode (400K bit/s)
1 SPI, maximum communication rate: 500 kHz
1 buzzer output, current capacity: 6 mA
Supports 4 × 24, 6 × 22 LCD drivers or 4 × 14 LED drivers
Low voltage comparison function (LVD), for comparing power supply voltages and external voltage
Built-in temperature sensor
RTC function to display year, month, day, week, hour, minute, second information
13 input ports with wake-up function
2 UARTs. Up to 115,200 bps baud rate
1 I2C slave, supports standard mode (100K bit/s) and fast mode (400K bit/s)
1 SPI, maximum communication rate: 500 kHz
1 buzzer output, current capacity: 6 mA
Supports 4 × 24, 6 × 22 LCD drivers or 4 × 14 LED drivers
Low voltage comparison function (LVD), for comparing power supply voltages and external voltage
Built-in temperature sensor
RTC function to display year, month, day, week, hour, minute, second information
Technical Documentation
Product manual(2)
Application Document(2)
Design and developmentn
Tools/Software
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CSU-IDE
Core sea 8-bit MCU/SOC integrated development environment
1. Integrated C compiler, assembler, linker, debugger
2. Support standard C language and assembly language development 3 Example code of integrated chips