ML63189B

• Rich instruction set 408 instructions Transfer, rotate, increment/decrement, arithmetic operations, comparison, logic operations,mask operations, bit operations, ROM table reference, stack operations, flag operations, branch, conditional branch, call/return, control.
• Rich selection of addressing modes Indirect addressing of four data memory types, with current bank register, extra bank register, HL register and XY register. Data memory bank internal direct addressing mode.
• Processing speed Two clocks per machine cycle, with most instructions executed in one machine cycle. Minimum instruction execution time : 61 ms (@ 32.768 kHz system clock) 1 ms (@ 2 MHz system clock)
• Clock generation circuit Low-speed clock : Crystal oscillation or RC oscillation selected with mask option (30 to 80 kHz) High-speed clock : Ceramic oscillation or RC oscillation selected with software (2 MHz max.)
• Program memory space
• ML63187 : 16K words
• ML63189B : 32K words Basic instruction length is 16 bits/1 word
• Data memory space
• ML63187 : 1024 nibbles
• ML63189B : 1536 nibbles
• Stack level Call stack level : 16 levels Register stack level : 16 levels
• I/O ports  Input ports: Selectable as input with pull-up resistor/input with pull-down resistor/highimpedance input Input-output ports: Selectable as input with pull-up resistor/input with pull-down resistor/ high-impedance input Selectable as P-channel open drain output/N-channel open drain output/CMOS output/high-impedance output Can be interfaced with external peripherals that use a different power supply than this device uses. Number of ports: ML63187 Input-output port : 2 ports ´ 4 bits ML63189B Input port : 1 port ´ 4 bits Input-output port : 4 ports ´ 4 bits
• Melody output Melody frequency : 529 to 2979 Hz Tone length : 63 types Tempo : 15 types Melody data : Resides in the program memory Buzzer driver signal output : 4 kHz
• LCD driver Number of segments : 1024 Max. (64 SEG ´ 16 COM) 1/1 to 1/16 duty 1/4 or 1/5 bias (regulator built-in) Selectable as all-ON mode/all-OFF mode/power down mode/normal display mode Adjustable contrast
• Reset function Reset through RESET pin Power-on reset Reset by low-speed oscillation halt
• Battery check Low-voltage supply check The value of the judgment voltage is selected by the software by setting the LD1 and LD0 bits of BLDCON.

The ML63189B is a CMOS 4-bit microcontroller with built-in 1024-dot matrix LCD drivers and operates at 0.9 V (min.). The ML63189B is suitable for applications such as games, toys, watches, etc. which are provided with an LCD display.

The ML63189B is an M6318x series mask ROM-version product of OLMS-63K family, which employs Oki's original CPU core nX-4/250.