C511 datasheet(23/43 Pages) SIEMENS

Part #	C511

Description	8-Bit CMOS Microcontroller

PDF	43 Pages

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Manufacturer	SIEMENS [Siemens Semiconductor Group]

Direct Link	http://www.siemens.com/

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23 / 43 page

C511 / C513

Semiconductor Group

Serial Interface (USART, not available in the C511/C511A)

The serial port is full duplex and can operate in four modes (one synchronous mode, three

asynchronous modes) as illustrated in table 9. Figure 8 illustrates the block diagram of Baudrate

generation for the serial interface.

Table 9

USART Operating Modes

Figure 8

Block Diagram of Baud Rate Generation for the Serial Interface

Mode

SCON

Baudrate

Description

SM0

SM1

000

OSC/12

Serial data enters and exits through R

×D.

×D outputs the shift clock. 8-bit are

transmitted/received (LSB first)

Timer 1/2 overflow rate

8-bit UART

10 bits are transmitted (through T

×D) or

received (R

×D)

210

OSC/32 or fOSC/64

9-bit UART

11 bits are transmitted (T

×D) or

received (R

×D)

Timer 1/2 overflow rate

9-bit UART

Like mode 2 except the variable

baud rate

C511 Datasheet(PDF) 23 Page - Siemens Semiconductor Group