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
Functional description
1. Reset MCU
Power On Reset
2. Reset JTAG. TAP controller will stay in Test-Logic Reset State.
3. Execution starts from address 0000 after reset.
1. Reset Chip.
Reset by RESET pin or WDT
2. Do not reset JTAG. TAP controller stays in the original state.
RESET (including set Reset
3. If the original TAP controller state is in run mode, chip reset
out and Reset in SC0)
4. If the original TAP controller state is in Halt mode. No any state changed
nTRST Low
1. No effect on MCU.
2. Reset JTAG. TAP controller will stay in Test-Logic Reset state.
17.
17.1
Ring Tone (PWM) Generator
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:
Tone Channel Number = 2
Tone Volume Step = 32
Tone Frequency Range = 91Hz~23KHz
12M
Frequency =
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
NUVOTEM TALEMA [ NUVOTEM TALEMA ]
