SN8P1937 is a high-performance 8-bit microcontroller with the 2K-word of the OTP ROM.
The SN8P1937 provides the following features: 128 bytes of RAM, one 8-bit basic timer
(T0) with RTC (Real Time Clock) function, one 8-bit timer counter (TC0) with PWM/buzzer
output function, a watchdog timer, 3-sources interrupts (T0, TC0, INT0) a in system
programming ROM (ISP ROM) register, a 16-bit ADC, a PGIA, a voltage regulator, a integrated
R and C-Type LCD driver for 4-common x 12 -segments LCD panel and a 8-level stack
register. In addition, the SN8P1937 is a dual clock system, i.e. high-speed system
clock and low-speed system clock. The high-speed system clock sources are generated
from the external oscillator which includes two modules (Crystal/Ceramic and external
clock signal), or on-chip 16MHz high-speed RC oscillator (IHRC 16MHZ). The low-speed
system clock is generated from on-chip low speed RC oscillator circuit (ILRC 32KHz@3v,
64KHz@5v).
