CST5341A/5271A General Descriptions:
CST5341A/5271A 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 includes 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 16K words and maximum data ROM size is 1024K byte. The maximum working SRAM is (256+2) nibbles. It is provided with total 16 software programmable I/O ports and 4 output only ports.
CST5341A/5271A Features:
Operating voltage: 2.0V to 5.5V
MCU Operation frequency: 8.192MHz
Memory Size
-Program ROM size: 16K*12-bits OTP type
-Data ROM size: 1024K*8-bits OTP type (Maximum)
-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 can wake-up from HALT mode to NORMAL mode and executing wake-up sub-routine program.
12 input/output pins: Port A, Port B and Port D can be defined as input or output port bit by bit.
4 output only ports: Port C.
4 input/output or 4 input only ports “Port E” defined by option: If input only ports are employed, Port E defined as input only ports. If input/output ports are selected, Port E 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.
CST5341A provides SOP8, SOP16, SSOP24 Package:
CST5341A/5271A Block Diagram:
CST5341A/5271A Speaker wakeup structure:
CST5341A/5271A The Application Circuit:
Notice:
1. Regarding recording or remote car applications, please reference application note on web site.
2. C1 : 47 uF ~ 100 uF(depends on applications), C2：0.1 uF
3. DAC Applications circuit not support PWM wakeup function.
4. DAC Applications, please reference application note on web site.
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