3. Pin Configurations of STC15W201S series MCU

All packages meet EU RoHS standards

T0CLKO refers to the programmable clock output of Timer/Counter 0

T2CLKO refers to the programmable clock output of Timer/Counter 2

In addition to programmable output on the internal system clock, T0CLKO/T2CLKO also can be used as

divider by dividing the frequency of the internal system clock or the input clock of external pin T0/T2.

MCLKO is the output of master clock whose frequency can be divided into MCLK/1, MCLK/2, MCLK/4

/1, MCLK/2, MCLK/4

, MCLK/2, MCLK/4

The master clock can either be internal R/C clock or the external input clock or the external crystal oscillator.

MCLK is the frequency of master clock.

Recommend UART1 on [P3.6/RxD_2, P3.7/TxD_2]

UART1/S1 can be switched in 2 groups of pins by selecting the control bits S1_S0.

S1 can be switched in 2 groups of pins by selecting the control bits S1_S0.

2 groups of pins by selecting the control bits S1_S0.

S1_S0

UART1/S1 can be switched between P1 and P3

0

1

Recommed UART1 on [P3.6/RxD_2, P3.7/TxD_2].

Mnemonic Add

Name

7

6

5

4

3

2

1

0

Reset

Value

AUXR1

P_SW1

A2H

Auxiliary

register 1

S1_S1

S1_S0

CCP_S1 CCP_S0 SPI_S1 SPI_S0

0

DPS

01xx,xx0x

CLK_DIV

(PCON2)

97H

Clock Division

register

MCKO_S1 MCKO_S0

ADRJ

16

15

14

13

12

11

10

9

1

2

3

4

5

6

7

8

Vcc

Gnd

P1.5

T0CLKO/P1.4

P1.3

P3.3/INT1

P3.2/INT0

P3.1/TxD/T2

P1.0/RSTOUT_LOW

P1.1

P3.0/RxD/INT4/T2CLKO

SOP16/DIP16

P3.3/INT1

P3.2/INT0

P3.1/TxD/T2

P3.0/RxD/INT4/T2CLKO

Vcc

Gnd

8

7

6

5

1

2

3

4

SOP8

The speed of external programmable

clock output of 5V MCU is also not

more than 13.5MHz, because the

output speed of I/O port of STC15

series 5V MCU is not more than

13.5MHz.

The speed of external programmable

clock output of 3.3V MCU is also not

more than 8MHz, because the output

speed of I/O port of STC15 series

3.3V MCU is not more than 8MHz.