Specifications:

Features
SH6610D-based single-chip 4-bit micro-controller
OTPROM: 6k X 16 bits
RAM: 389 X 4 bits
69 System control register
320 Data memory
Operation voltage:
fOSC = 30kHz - 4MHz, VDD = 2.4V - 5.5V
fOSC = 4MHz - 8MHz, VDD = 4.5V - 5.5V
29 CMOS bi-directional I/O pins
8-level stack (including interrupts)
Two 8-bit auto re-loaded timer/counter, one can switch to
external clock source
Warm-up timer
Built-in pull-high for I/O port
Powerful interrupt sources:
Timer0 interrupt
Timer1 interrupt
Timer2 interrupt
External interrupts: PORTF (Falling edge), CMPOUT
Oscillator (code option)
Crystal oscillator: 32.768kHz, 400kHz - 8MHz
- Ceramic resonator: 400kHz - 8MHz
- External RC oscillator: 400kHz - 8MHz
- Internal RC oscillator: 2MHz, 4MHz, 6MHz
- External clock: 30kHz - 8MHz
Instruction cycle time (4/fOSC)
Two low power operation modes: HALT and STOP
Reset:
- Built-in watchdog timer (code option)
- Built-in Power-on Reset (POR)
- Built-in Low Voltage Reset (LVR)
Two-level Low Voltage Reset (LVR) (code option)
One 16-bit timer/counter for pulse measurement
LED numeric display drive capability on PORTA, PORTB,
PORTD and PORTH [1:0]
Built-in one comparator
Read ROM Table function
2 channels Tone generator
Internal reliable reset circuit
OTP type/code protection