Flash Type Voice Demo Board HT83F02 Characteristics Fully integrated RC oscillator External power amplifier -- HT82V739 External SPI Flash Memory PWM / DAC output selection Digital volume control for PWM / DAC output Key select voice to play LDO HT7233 Power Adaptor Connector Power On / Off Switch PWM/DAC Output Selection Switch MCU HT83F02 Power Amplifier HT82V739 e-Writer plus Connector SPI Flash Operation Maunal KEY1 : Play current voice KEY2 : Play previous KEY3 : Play next KEY4 : Volume up KEY5 : Volume down Block Diagram Application Circuit SPI Flash Power Circuit VDD VDD1 R11 POWER SWITCH 1N5817 R9 C2 330 0.1u HT7233 VIN VOUT BT1 BATTERY V33 3 SO + C1 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 SCLK SI NC NC NC NC GND WP# NC VCC NC NC NC NC CS# SO SK SI VSS V33 MX25L12845E(16-SOP 300mil) SW3 100u 1 Mini USB CON 2 VDD GND D2 U3 2 1 OFF 3 R10 47K 10u SW24 ON 1 1 2 3 4 5 VDD USBUSB+ VSS VSS V33 U14 C12 10 JA1 V33 VDD2 C19 C20 0.1u 10u SCSBA 2 JUMPER D1 Power LED 3 VSS 2 V33 V33 R13 R14 0 VSS2 U15 SO 47K V33 R12 VSS 1 2 3 4 VCC HOLD# SCLK SI CS# SO WP# GND 8 7 6 5 SK SI C21 0.1u MX25L1606E(8-SOP 200mil) 0 VSS1 U1 SK SO SI SCSBA VSS 1 3 5 7 9 11 13 15 17 19 2 4 6 8 10 12 14 16 18 20 2 4 6 8 10 12 14 16 18 20 e-Writer plus CON PA2 PB2 SI SK SO SCSBA VSS VDD RESB VSS2 AUD VDD2 PA0 VDD2 PA1 PA0 PB0 PB1 PB2 PB4/SDO PB5/SCLK PB6/SDI PB7/SCSB OSC1 OSC2 VSSA2 AUD VCCA2 PA2 PA3 PA4 PA5 PA6 PA7 VSS VDD VCCA3 RESB VSSA1 PWM2 PWM1 VCCA1 28 27 26 25 24 23 22 21 20 19 18 17 16 15 PA2 PA3 PA4 PA5 PA6 PA7 VSS RESB VSS1 PWM2 PWM1 VDD1 VDD1 SP+ 3 PWM2 4 SP- 6 2 5 C25 C22 C3 0.1u 0.1u 0.1u SW9 C10 0.1uF C11 C9 0.01u 10uF LS1 SP- 1 AUD_IN 2 VREF 3 VSS1 4 U2 OUTN VDD AUDIN OUTP Vref NC VSS CEB 8 7 SP+ 6 PB2 5 HT82V739 8-SOP (150 mil) VSS2 C23 100uF 0.1u VSS1 PA0 R8 330 D4 PLAY LED SPEAKER PA1 PA2 PA3 PA4 1 1 1 1 1 PA5 1 PA6 1 PB2 PA7 Speaker Output C8 RESET Power Amplifier SW2 1 50K VR1 VOL VDD HT83F02 PWM1 VDD1 AUD VDD R5 100K HT83F02 28SSOP Connector V33 VDD 1 JP14 1 3 5 7 9 11 13 15 17 19 1 2 3 4 5 6 7 8 9 10 11 12 13 14 2 PA1 PA0 LED & KEY 1 S1 KEY1 2 S2 KEY2 2 S3 KEY3 2 S4 KEY4 2 S5 KEY5 2 S6 KEY6 2 S7 KEY7 2 S8 KEY8 2