SN8P2977A is a high-performance 8-bit microcontroller with the 4K-word of the OTP
ROM. The SN8P2977A provides the following features: 256bytes of RAM, one 8-bit basic
timer (T0) with RTC function, one 8-bit timers/counters (TC0), a watchdog timer, Six-sources
interrupts (INT0, INT1, T0, TC0, ADC, UART), a in system programming ROM (ISP ROM)
function with VPP voltage generation internally, a 20-bit ADC, a PGIA, a voltage regulator,
a integrated R and C-Type LCD driver for 4-common x 16 -segments LCD panel and a 8-level
stack register. In addition, the SN8P2977A is a dual clock system, i.e. high-speed
system clock and low-speed system clock. The high-speed system clock source is generated
from internal 8MHz high-speed RC oscillator (IHRC 8MHz). The low-speed system clock
is generated from on-chip low speed RC oscillator circuit (ILRC [email protected]) or external
32768Hz crystal@ IHRC_RTC.
