CST1608A(C) General Description：
The TxP16S2TM is a high performance 16-bit MCU, running up to 32MHz and provided with 512K FLASH and total 4K SRAM for high performance process of audio algorithm. It is the new generation computational kernel for Flash Speech series. It has initially aimed at the areas of speech application to demonstrate its profession. TxP16S2 furnish with a fast unit, which allows calculation instructions to be issued with access memory simultaneously during one cycle. The CST1608A(C) is equipped with TxP16S2 and integrating input/output ports,Audio PWM/DAC, Timer and Low Voltage Reset...etc on a chip.
Furthermore, CST1608A(C) extend its external device connection capability such as Serial ROM/Flash. The internal memory capacity includes 512Kx16 program/data FLASH plus 4Kx16 working SRAM.
CST1608A(C) Features：
*Notice: CST1608C only supports SOP16-3 and SSOP24-2 packages.
*Notice: CST1608A(C) do not support ultra-deep sleep.
*Notice: PortC2 are forbidden to be connected with VCC or pull-up resistance.
*Notice: CST1608A(C) does not support buzzer and speaker wake up, so MISC1 bit10, MISC2 bit 12 and MISC2 bit14 should be set to 0.
*High-performance RISC TxP16S2 CPU
-wide working frequency and voltage 4Mhz ~32Mhz@1.8Volt ~ 5.5Volt
-Operation frequency is programmable by Software
-Built-in 4096x16 SRAM
-Embedded PC Stack Level 16
*Rich DSP function
-Hardware Circular Buffer support
-MAC Computation power : 32 MIPS (max.)
-Multi-Function Support: In MAC calculation, simultaneously access two operands from memory in one cycle
-Extend Dynamic Range: A 40-bit accumulator to ensure in 512 successive multiple+additions no overflows
*Embedded Flash 512Kx16
-Typical 1,000 erase/program cycles
-Greater than 10 years Data Retention
*Software-based audio processing technical
-Subband , ADPCM , Melody
*Support 24+2(ICE PAD can be as I/O) general purpose I/O port.
*Mono 16bit PWM or 16bit DAC
*6 IRQ include 2 external interrupt
*SPI Master interface
*Three timers: Timer1, Timer2, RTC timer
*Support Spread Spectrum clocking to reduce EMI.
*Watch dog timer (WDT)
*Low voltage reset (LVR)
*PB0, PB1, PB2, PB3 support two edge modes for wake-up function are rising and falling edge trigger.
*2 channel comparators and a two stage OPA with class AB output
*Microphone with AGC(Auto Gain Control)
*IR
*Touch with BG Pre-Charge
*Low voltage detector
*Notice: VCC Decoupling Cap 10uF should be close to IC within 0.5cm.
*Notice: VCC Decoupling Cap 0.1uF should be close to IC within 0.5cm.
*Notice: The width of VCC and VSS power line should be greater than 30 mil in PCB layout.
*Notice: Special I/O PortC2 will cause LED flashing light when power on.
*PortA4 and PortA5 are not supported touch function.
*Notice: PortC2 / PortC6 / PortC7 are forbidden to be directly connected to inductive components. For example, motors and coils, etc.
*Notice: PWM / DAC are forbidden to be connected to 4Ω speaker.
*CST16512A 和CST1608A(C) 的差異如下:
-CST1608A(C)的 I/O 增加 PortA4 和 PortA5。
-CST1608A(C) 的 Touch 功能支援 BG Pre-Charge
-CST1608A(C) 的 Microphone 增加 PGA gain boost(GBB)
-CST1608A(C) 的 LVR 改為 8 種不同電壓，1.7V / 1.8V / 1.9V / 2.0V / 2.1V / 2.2V / 2.3V / 2.4V。
-CST1608A(C) 的電壓工作範圍 1.8V~5.5V
-CST1608A(C) 不支援 Deep sleep 功能
-CST1608A(C) 的 PWM 可以調整趨動電流
-CST1608A(C) 的 PortC2 和 PortC6 和 PortC7 禁止接電感性元件，例如馬達、線圈。
-CST1608A(C)的 PWM / DAC 輸出 禁止接 4Ω 喇叭。
-CST1608A(C)的 PortA4 和 PortA5 不支援 Touch 功能
-因為CST16512A 沒有 PortA4 和 PortA5，所以如果從CST16512A 的程式直接轉到CST1608A(C)，需要注意 PortA4 和 PortA5 的設定。例如進入 sleep mode 時，要把 PortA4 和 PortA5 設定為 input 加 pull down
R，以免漏電。
CST1608A(C) Application Field：
*MCU Application
*Electronic Dictionary
*Handheld Games
*Electronic Learning Aid (ELA)
*Electronics storybook
CST1608A(C) Block Diagram：
CST1608A(C) MAC (16-bit X 16-bit Multiplier and Accumulator)：
A 16 bit x 16 bit MAC is provided for digital signal processing. The core of MAC operation is multiply MX&MY
with 2’S complement operand and accumulation previous 40-bit MF then rounding store result in the 40-bit MR
register. The basic MAC architecture is shown as Figure 5.5.
CST1608A(C) Application Circuit：
Application Circuit: Mono16-bit PWM output
Notice:
1. VCC Decoupling Cap 10uF should be close to IC within 0.5cm.
2. VCC Decoupling Cap 0.1uF should be close to IC within 0.5cm.
3. The width of VCC and VSS power line should be greater than 30 mil in PCB layout.
CST1608A(C) Package:
SOP8/SOP16-2/SOP16-3/SSOP24/SSOP24-2
Business consulting
13823761625
Mail me