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| W74110 4-BIT MICROCONTROLLER GENERAL DESCRIPTION The W74110 is a single-chip CMOS 4-bit microcontroller (C) that operates on low voltage and very low current. It contains a 4-bit ALU, a timers, a divider, a serial port, and five 4-bit input/output ports (including one output port for driving LEDs). There are also four interrupt sources and 4-level subroutine nesting for interrupt applications. The W74110 has two power reduction modeshold mode and stop modewhich help to minimize power dissipation. The product is a powerful microcontroller for remote controllers, multiple I/O products, keyboard controllers, speech synthesis LSI controllers, and other products. FEATURES * * * * * * Operating voltage: 1.3V - 6.0V Operating frequency up to 1MHz for RC oscillator Built-in crystal or RC oscillator by pin option 1024 x 16 bit program ROM 64 x 4 bit data RAM 21 input/output pins: - Ports for input only: 2 ports/8 pins - Input/output ports: 2 ports/8 pins - Ports for output only: 1 ports/4 pins (high current for LED driving) - Control output pin: 1 pin (MFP) HOLD function: no operation (except for oscillator) STOP function: no operation (including oscillator) Four types of interrupts - Two internal interrupts (Divider and Timer) - Two external interrupts (Port RC & INT pin) Built-in 14-bit clock frequency divider circuit Built-in 8-bit programmable down-count timer Powerful instruction set: 83 instruction sets Direct and indirect addressing mode 4-level subroutine (include interrupt) nesting All instructions are executed in one machine cycle except for indirect addressing mode Up to 4 S instruction cycle (at 1 MHz operating frequency) Internal serial transmission port RT specified by software * * * * * * * * * * * -1- Publication Release Date: April 1997 Revision A1 W74110 PIN CONFIGURATION W74110 NC NC RD0 RD1 RD2 RD3 RC0 RC1 RC2 RC3 RA0 RA1 RA2 RA3 RB0 RB1 RB2 RB3 VSS TEST5 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 NC NC NC NC VDD XOUT XIN CLKC /INT /RES TEST2 TEST1 RE0/DATA RE1/CLK RE2 RE3 MFP TEST4 TEST3 TEST6 40 DIP PIN DESCRIPTION PIN NO. 3-6 7-10 SYMBOL RD0-RD3 RC0-RC3 I/O I I 4-bit port for input only. 4-bit port for input only. Each pin has an independent debounce circuit and interrupt capability. Input/output port. Mode can be switched by the IPA and OPA instructions. Input/output port. Mode can be switched by the IPB and OPB instructions. Negative power supply (-). FUNCTION 11-14 15-18 19 RA0-RA3 RB0-RB3 Vss I/O I/O I -2- Publication Release Date: April 1997 Revision A1 W74110 Pin description, continued PIN NO. 20 21 22 23 24 SYMBOL TEST5 TEST6 TEST3 TEST4 MFP I/O O O O O O Test pin Test pin Test pin Test pin FUNCTION Output pin only. This pin outputs software selectable modulating and nonmodulating signals according to the MFP instruction. Special output port. This port can be configured by software to act as the output of internal port RT or the inverse output of external port RC. Test pin Test pin System reset pin with pull-up resistor. External interrupt pin with pull-up resistor. Clock mode control pin. CLKC = "H": Crystal mode CLKC = "L": RC mode Input pin for oscillator. Connected to crystal or resistor to generate system clock by pin option. Output pin for oscillator. Connected to crystal or resistor to generate system clock by pin option. Positive power supply (+). No connection. 25-28 RE0/DATA RE1/CLK RE2, RE3 TEST1 TEST2 RES O 29 30 31 32 33 I I I I I INT CLKC 34 XIN I 35 XOUT O 36 1,2,37,38, 39,40 VDD NC I - -3- Publication Release Date: April 1997 Revision A1 W74110 BLOCK DIAGRAM ROM (1024*16) RAM (64*4) PORT RA RA0-3 PORT RB RB0-3 PC ALU PORT RD RD0-3 ICF STACK (4 Levels) PEF HMF IEF Timer (8 Bit) MR PR Divider PORT RC RC0-3 RC SEL RT MUX RE RE0-3 (RE0/DATA, RE1/CLK) PORT RT Timing Generator Central Control Unit Modulation Frequency Pulse Generator MFP CLKC XIN XOUT TEST1 TEST2 TEST3 TEST4 TEST5 TEST6 RES INT VDD VSS -4- Publication Release Date: April 1997 Revision A1 W74110 Headquarters No. 4, Creation Rd. III, Science-Based Industrial Park, Hsinchu, Taiwan TEL: 886-3-5770066 FAX: 886-3-5792697 http://www.winbond.com.tw/ Voice & Fax-on-demand: 886-2-7197006 Winbond Electronics (H.K.) Ltd. Rm. 803, World Trade Square, Tower II, 123 Hoi Bun Rd., Kwun Tong, Kowloon, Hong Kong TEL: 852-27513100 FAX: 852-27552064 Winbond Electronics North America Corp. Winbond Memory Lab. Winbond Microelectronics Corp. Winbond Systems Lab. 2730 Orchard Parkway, San Jose, CA 95134, U.S.A. TEL: 1-408-9436666 FAX: 1-408-9436668 Taipei Office 11F, No. 115, Sec. 3, Min-Sheng East Rd., Taipei, Taiwan TEL: 886-2-7190505 FAX: 886-2-7197502 Note: All data and specifications are subject to change without notice. -5- Publication Release Date: April 1997 Revision A1 |
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