SC9351 Просмотр технического описания (PDF) - Silan Microelectronics

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SC9351

AUDIO SYSTEM CONTROL MCU

Silan Microelectronics 

SC9351

of TIMER, which is different from frequency divided-by-12 of 8051.

MCLK/2, MCLK/4, MCLK/8, MCLK/16, MCLK/32, MCLK/64, MCLK/128 and MCLK/256 can be selected for

timer/counter, and MCLK can be 12MHz, 6MHz and 75KHz according to different MCU operating modes.

Note: For SC9351, T0 is connected to 0 and T1 is connected to 1, so there is no counter mode.

4.6 Timer T2/T3

Operating mode of T2: internal timing/counting and PWM mode

Operating mode of T3: internal timing mode

Six clocks below can be selected according to different operating mode:

¾ MCLK/16

¾ MCLK/64

¾ OSC75K

¾ MCLK /256

¾ MCLK /512,

¾ MCLK /1024

4.7 I2C

The I2C interface of SC9351 has configurable host and slave modes with 7-bit device addressing function

supporting 400Kbps baud rate; however, multiple hosts and the relevant arbitration processing, etc. are not

supported. It has mainly three operating modes: Host transmitting and slave receiving; host receiving and slave

transmitting continuous mode; host receiving and slave transmitting random mode;

4.8 UART

Two independent UARTs can implement serial communication with the following operating modes:

1. 8-bit asynchronous communication mode, baud rate adjustable;

2. 9-bit asynchronous communication mode, baud rate fixed(MCLK/16, MCLK/32);

3. 9-bit asynchronous communication mode, baud rate adjustable.

4.9 SPI

SPI adopts three-line transmission method including SCK (bi-direction clock line), SDI (data output) and SDO

(data input), which supports simplex, half duplex, full duplex transmission modes below:

1. Internal (clock)transmitting－－external (clock)receiving

2. Internal receiving－－external transmitting

3. Internal receiving/transmitting－－external receiving/transmitting

4.10 ADC

8-bit AD converter is mainly used for keyboard scan, electronic volume or low-speed data sampling with three

input channels (AN0~2) which can be chosen for input conversion voltage and the result is stored in an 8-bit

register. There are four clock sources (75KHz, MCLK/8, MCLK/16, MCLK/32) for conversion clock and internal

reference voltage or external power supply (VDD) can be reference voltage.

11 clock cycles are needed for one AD conversion, and conversion time is7.3μs when the clock source of ADC is

MCLK/8 under 12MHz system clock.

HANGZHOU SILAN MICROELECTRONICS CO.,LTD

Http: //www.silan.com.cn

REV:1.0 2009.02.16

Page 16 of 19

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