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The ISSI IS31CS8973 is a 1-Cycle 16MHz 8051 CPU 256B IRAM and 768B XRAM 32KB Flash Memory (IAP and ISP) 128 Byte Information Block 15 Interrupts with 2 priority levels 4x 16-bit Timers (T0/T1/T2/T3/T4) 1x 24-bit Timer (T5) 1x Programmable 30-bit Watch Dog Timer Up to 20 GPIO pins Low power standby in SLEEP mode # Digital Peripherals # 16-bit PCA and 6 channel of CCP modules Capture/Compare/Timer Mode 8/16-bit PWM Mode and 8-bit WPWM Mode 12 CH 8-bit PWM Controller One buzzer waveform generator One I2C Master One I2C Slave, supports two consecutive addresses One SPI Master/Slave Controllers, with 4 bytes transmit and receive FIFO One 8051 UART One full-duplex LIN-capable EUART2 16-bit baud rate register 16 bytes transmit and receive FIFO # Analog Peripherals # 12-bit monotonic SAR ADC 500KHz, 128μsec conversion time (1.8~2.4V) 4Mhz, 16usec conversion time (2.5~5.5V) Programmable Gain Amplifier Up to 16 input shared with GPIO Onchip 1.1V reference and temperature sensor 12-bit voltage output DAC 4-Channel Analog Comparator Capacitance sense touch-key controller scan up to 19 keys through shared GPIO TK1 oscillator type TK2 charge transfer type Power on reset (1.5V) and LVD/LVR (1.8V-5.5V) # Clock sources # Internal oscillator at 16MHz of +/- 2% accuracy Internal low power 32KHz oscillator # Others# Integrated break point controller and debug port through I2C slave.

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Data Sheets
Data Sheet for the ISSI IS31CS8973
Data Sheet
116,552 bytes
Instructions Set Details for the ISSI IS31CS8973
Instructions Set Details
282,266 bytes

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Simulated Features

The following on-chip peripherals are simulated by the Keil Software µVision Debugger.

  • 4 Clocks per Machine Cycle
  • Clock Divider and Multiplier
  • External Memory Stretch Cycle support
  • Interrupts xS/2L (including external)
  • Port 0
  • Port 1
  • Port 2
  • Port 3
  • Power save modes (Idle & Power down)
  • Ring Oscillator
  • Timer 0
  • Timer 1
  • Timer Rate Control
  • Ultra High Speed (10 times faster)

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