MSSI121 MOSEL VITELIC INC. April 1996 12" Instant Voice VROM Features Single power supply can operate at 2.4V through 6V. Current output can drive 8 ohm speaker with a transistor, Vout can drive buzzer directly. The voice content is stored for 7-12 seconds for SI121 including mute and is single section / phrase and single trigger. Automatic power down. A phrase is composed of repetitive sections. Interrupt function (INTP) stops the audio output at once. An LED function with 3Hz flash is provided to tell the audio status. Repeat pin was provided to keep audio output repeating. Built-in power on play function and is programmable. Programmable option for either Retrigger or not. Programmable option for either Level or Edge trigger type. Programmable option for either Holdable o Unholdable output type. Programmable option for repeat times up to 8 times. Programmable option for either LED display or STOP pulse on LED/STP pin. SI121 can be programmed by MSM9159, MSM9156, MSM9141S, MSM9140 & MSM9139. A STOP pulse comes out when audio signal is finished. CDS input interface with 10ms debounce is provided for trigger pin, REP pin and INTP pin. Block Diagram INTP REP TG CONTROL V DD V SS TIMING GENERATOR ADDRESS GENERATOR VOICE LOGIC ROM LED/STP TRIGGER TABLE OSC MPCM DECODER CLOCK GENERATOR CURRENT BUFFER C OUT BUZZER BUFFER V OUT1 V OUT2 See 15-page data sheet PID 224B 04/95 for details which belongs to MSSI241. Taiwan #1, Creation Road I, Science - based Industrial Park, Hsinchu, 30077 Taiwan, ROC "audio_reply @ccmail.mosel.com.tw" TEL: 886-3-5770055 FAX: 886-3-5772788 FAX: 886-3-5784732 Taipei 7F, #102 Sec. 3, Ming Chung E. Road, Taipei,105 Taiwan, ROC Hongkong #19 Dai Fu Street, Taipo Industrial Estate, Taipo, N.T. Hongkong TEL: 852-2388-8277(MKO) TEL: 852-2665-4883 FAX: 852-2664-2406 FAX: 852-2770-8011(MKO) TEL: 886-2-5451213 FAX: 886-2-5451214 U.S.A. #3910 North First Street, San Jose, CA. 65134-1501 U.S.A. TEL: 1-408-433-6000 FAX: 1-408-433-0952 Specifications subject to change without notice, contact your sales representatives for the most recent information. 1/1 (PID 224B 04/96)