CST5085A General Descriptions:
CST5085A series are 4-bits micro-controller which could play 4 channel melody or 4 channel ADPCM with PWM direct drive circuit. PWM resolution is 8/10/12 bits. They include a low cost, high performance CMOS micro-processor. The clock frequency of this up is typically 8.192 (±3%) MHz. This chip operates over a wide voltage range of 2.0V~5.5V. It contains program ROM (PROM) and data ROM (DROM) inside.
The maximum program ROM is 8K words and maximum data ROM size is 255K byte. The maximum working SRAM is (256+2) nibbles. It is provided with total 16 software programmable I/O Ports.
CST5085A Features:
Operating voltage: 2.0V to 5.5V
MCU Operation frequency: 8.192MHz
Memory Size
-Program ROM size: 8K*12-bits MASK type
-Data ROM size: 255K*8-bits MASK type
-SRAM size: 256*4 bits
-User register: 2*4 bits
Wakeup function for power-down mode:
-HALT mode wakeup source: Port A, Port B, Port D and Port E/CE can wake-up from HALT mode to NORMAL mode and executing wake-up sub-routine program.
-RTC wakeup: Clock source comes from internal LRCOSC, time period 1/16/64/128 ms.
RTC wakeup function only support in CST5165S1.
12 input/output pins: Port A, Port B and Port D can be defined as input or output port bit by bit.
4 input/output ports or 4 input only ports or 4 output only ports “Port CE/E/C” defined by option:
-If input only ports are employed, Port E defined as input only ports.
-If output only ports are employed, Port C defined as output only ports.
-If input/output ports are selected, Port CE defined as input/output ports bit by bit.
Four reset condition:
-Low voltage reset. (LVR = 2.0V)
-Power on reset.
-External reset pin. (active low)
-Watch dog timer overflow.
One internal interrupt sources:
-PWM interrupt.
WDT
-Watch dog timer, can enabled/disabled by option.
-WDT period is 256*256*16/Fsys. (WDT period is 0.13 sec for system clock=8.192MHz)
Audio output:
-Support PWM or DAC mode by option.
-Support 8/10/12 bits.
Support option set for pull down resistor 1M, 50K or 220K Ohm, reset pin (PB3 or PC3), low voltage reset…etc.
Oscillator fuse option ±3%, temperature & voltage compensation.
Support security option (1 bit) for read inhibition.
Support 16-levels LVD function.
CST5085A提供SOP8, SOP16, SSOP24封裝：
CST5085A Block Diagram：
CST5085APort PCE mode block diagram：
CST5085A The Application Circuit：
DAC Selected by option
Motor application
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