MSM6411A

E2E0015-38-93 ¡ Semiconductor MSM6411A ¡ Semiconductor High speed and Simple 4-Bit Microcontroller This version: MSM6411A Sep. 1998 Previous version: Mar. 1996 GENERAL DESCRIPTION The MSM6411A, implemented in complementary metal-oxide semiconductor technology, is a low-power CMOS 4-bit microcontroller developed for smaller-scale control systems. FEATURES ROM : 1024 words ¥ 8 bits RAM : 32 words ¥ 4 bits I/O port Input-output port : 2 ports ¥ 4 bits Input port : 1 port ¥ 3 bits 8-bit serial shift register 2 interrupt sources (1 external, 1 internal) 63 instructions Power-down features Minimum instruction execution time : 952 ns @ 4.2 MHz clock Single 5 V power supply Package: 16-pin plastic DIP (DIP16-P-300-2.54) : (Product name : MSM6411A-¥¥RS) ¥¥ indicates a code number. 1/11 ¡ Semiconductor MSM6411A BLOCK DIAGRAM RAM 32 ¥ 4 bits 3 DEC C ACC 0 INST. DEC. ROM 1024 ¥ 8 bits DEC 2 SP 0 3 L 0 H ALU 9 PC 0 P2 2 1 0 P1 3210 P0 3210 I 7 SR f O 0 INT.C T.G INT SISO SCK RESET OSC0 OSC1 VDD GND 2/11 ¡ Semiconductor MSM6411A PIN CONFIGURATION (TOP VIEW) P1.2 P1.3 P2.0/INT P2.1 P2.2 OSC1 OSC0 GND 1 2 3 4 5 6 7 8 16 VDD 15 P1.1 14 P1.0 13 P0.3/SI 12 P0.2/SO 11 P0.1/SCK 10 P0.0 9 RESET 16-Pin Plastic DIP PIN DESCRIPTIONS Pin 10 11 12 13 14 15 1 2 3 4 5 7 6 9 16 8 Symbol P0.0 P0.1/SCK P0.2/SO P0.3/SI P1.0 P1.1 P1.2 P1.3 P2.0/INT P2.1 P2.2 OSC0 OSC1 RESET VDD GND I O I I I I 3-bit input port with latch. P2.0 is used as both input p...