CMOSTEK CMT2380F17, Manual

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CMT2380F17
Rev0.1 | 33/347
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CMT2380F17 can operate at a much lower speed and thereby greatly reduce the power consumption.
The CMT2380F17 has 16K bytes of embedded Flash memory for code and data. The Flash memory can
be programmed either in serial writer mode (via ICP, In-Circuit Programming) or in In-System Programming
mode. And, it also provides the In-Application Programming (IAP) capability. ICP and ISP allow the user to
download new code without removing the microcontroller from the actual end product; IAP means that the
device can write non-volatile data in the Flash memory while the application program is running. There needs
no external high voltage for programming due to its built-in charge-pumping circuitry.
。
In addition to standard 80C51 functions, CMT2380F17 also adds enriched peripherals. Please see the table
below for details.
Table 3-1. CMT2380F17 Peripheral Resource List
Resource Name Standard 80C51 Peripheral CMT2380F17 Peripheral Notes
IRAM 256 Bytes 256 Bytes
External Interrupt 2 3
Support high/low trigger
selection
Interrupt source 4 Interrupt sources
16 interrupt sources, 4
priority levels
UART0 Standard Enhanced serial port
UART1
Support
Timer 0 Support
Support
Timer 1
Support Support
Timer 2
Support Support
Timer 3
Support
DMA
Support
IO port 17
XRAM 768 Bytes
ADC 12-bit
≥500Ksps sampling rate
PCA0 8-ch
6ch counert/capture/PWM
2ch capture/PWM
SPI 1
TWI 2 TWI & STWI
Keyboard interrupt (KBI) 8-ch
Watchdog (WDT)
Support
Real Time Clock (RTC)
Support
Low voltage detector 2
External crystal oscillator circuit Support
Internal high-speed RC oscillation 1 High-precision IHRC
Internal low-speed RC oscillation 1
Clock multiplier 1 Core frequencymultiplier
The CMT2380F17 supports a variety of operating modes: idle mode, power-down mode, slow-frequency
mode, sub-frequency mode, RTC mode, watch mode and monitor mode. Applying or combinaing these
operating modes can effectively reduce system power consumption.

Idle mode
：
the CPU is frozen while the peripheral modules and interrupt system are still active.