W681308DG Datasheet, PDF (50/64 Pages) Nuvotem Talema – W681308 USB Audio Controller from Nuvoton integrates fast 8051 Microcontroller Unit (MCU)

W681308
XXXX PRODUCT DESCRIPTION
16.4 Reset Behavior
TB51 will start to execute internal code after power on reset. If host JTAG ICE connects with TB51, the host ICE can send
command to control the TB51.
Reset type
Power On Reset
Reset by RESET pin or WDT
RESET (including set Reset
out and Reset in SC0)
nTRST Low
Functional description
1. Reset MCU
2. Reset JTAG. TAP controller will stay in Test-Logic Reset State.
3. Execution starts from address 0000 after reset.
1. Reset Chip.
2. Do not reset JTAG. TAP controller stays in the original state.
3. If the original TAP controller state is in run mode, chip reset
4. If the original TAP controller state is in Halt mode. No any state changed
1. No effect on MCU.
2. Reset JTAG. TAP controller will stay in Test-Logic Reset state.
17.
Ring Tone (PWM) Generator
17.1 Overview
The ring tone or PWM can generate dual frequency tones through on chip speaker driver. There are two tone signals can be
mixed to the speakerphone driver output. This subsection describes the Ring Tone Generator with the PWM (Pulse Width
Modulation) format.
Ring tone generator (PWM) specification:
ƒ Tone Channel Number = 2
ƒ Tone Volume Step = 32
ƒ Tone Frequency Range = 91Hz~23KHz
Frequency = ^12M Hz N = 1 ~ 256
16 × N × 32
The tone frequency/volume control signal path is shown as Figure 13.
Figure 13 Ring Tone Generator Block
50
Rev1.2