BK2535 datasheet(44/133 Pages) BEKEN

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BK2535 datasheet

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Page 44 of 133

Figure 10

Serial Transmit Mode 1

Reception

To receive data, set the SCON.REN bit and clear the SCON.RI, this will enable

the receive function. When received the data value can be read from the SBUF

special function register.

Figure 11

Serial receive Mode 1

6.2.2.3. Mode 2 (asynchronous mode, full duplex)

In Mode 1, data is transmitted through serial out signal and received through

serial in

signal. The data is composed of 11 bits: 1 start bit, 8 data bits, 1 TB8 bit

(in SCON) and the stop bit. The extra TB8 bit is for use in a multiprocessor

communication environment. When multiprocessor communication support is not

needed, this bit can also be used as a parity bit. The data transfer rate in Mode 2

is fixed as clock/32 or clock/64. Timer 1 and Timer 2 are independent of the Baud

Rate generation and can be used for other purposes. To select the mode 2, set

SCON.SM0 and clear SCON.SM1.

Transmission

To send out data, clear the SCON.REN bit and write the data into the SBUF

special function register. The data will then be shifted out (LSB first, MSB last), at

the serial out pin.

BK2535 Datasheet(PDF) 44 Page - Beken Corporation