W681308DG Datasheet, PDF (5/64 Pages) Nuvotem Talema – W681308 USB Audio Controller from Nuvoton integrates fast 8051 Microcontroller Unit (MCU)

W681308
XXXX PRODUCT DESCRIPTION
LIST OF TABLES
Table 1 Pin Description .......................................................................................................................................................... 10
Table 2 W681308 MCU SFR location..................................................................................................................................... 22
Table 3 Interrupt Priority Structure.......................................................................................................................................... 23
Table 4 Timer Mode/Control TMOD/TCON SFR .................................................................................................................... 24
Table 5 Timer 2 Mode/Control TMOD/TCON SFR ................................................................................................................. 25
Table 6 Time-Out Values For Watchdog Timer ...................................................................................................................... 26
Table 7 Watchdog Control WDCON SFR............................................................................................................................... 26
Table 8 Watchdog Control Bits ............................................................................................................................................... 27
Table 9 Watchdog Timer Timeout Control.............................................................................................................................. 27
Table 10 Serial Control SCON SFR ....................................................................................................................................... 28
Table 11 JTAG Pin Description .............................................................................................................................................. 49
Table 12 W681308 USB Endpoint Definitions ........................................................................................................................ 53
Table 13 USB Descriptor RAM Definitions ............................................................................................................................. 54
LIST OF FIGURES
Figure 1 Pin diagram ................................................................................................................................................................ 8
Figure 2 W681308 Function Block Diagram ........................................................................................................................... 11
Figure 3 Interrupt Structure .................................................................................................................................................... 31
Figure 4 Keypad Scanning Application Circuit........................................................................................................................ 33
Figure 5 PCM Interface, Gain Stage and Mixer Location ....................................................................................................... 36
Figure 6 Mixer Connection Case Examples ........................................................................................................................... 37
Figure 7 Mixer Examples with Registers Setting .................................................................................................................... 39
Figure 8 W681308 CODEC Signal Path Control .................................................................................................................... 43
Figure 9 Microphone Voltage Gain Mode ............................................................................................................................... 45
Figure 10 Microphone Current Gain Mode ............................................................................................................................. 45
Figure 11 Microphone Auxiliary Input Mode ........................................................................................................................... 46
Figure 12 SPI Block Diagram ................................................................................................................................................. 47
Figure 13 Ring Tone Generator Block .................................................................................................................................... 50
Figure 14 Signal flow through Acoustic Echo Cancellation in the speech processor.............................................................. 51
Figure 15 USB Function Block Diagram ................................................................................................................................. 52
Figure 16 W681308 Reference Design Application Circuit..................................................................................................... 61
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