SM59R02G1 Datasheet, PDF (41/57 Pages) SyncMOS Technologies,Inc – Instruction-set compatible with MCS-51

SM59R02G1
8-Bit Micro-controller
8KB with ISP Flash
& 256B RAM embedded
Fig. 8-2: Receive mode 0 for Serial 0
8.1.2. Mode 1
Here Pin RXD0 serves as input, and TXD0 serves as serial output. No external shift clock is used, 10 bits are
transmitted: a start bit (always 0), 8 data bits (LSB first), and a stop bit (always 1). On receive, a start bit synchronizes
the transmission, 8 data bits are available by reading S0BUF, and a stop bit sets the flag RB80 in the SFR S0CON. In
mode 1, either internal baud rate generator or timer 1 can be use to specify the desired baud rate.
Fig. 8-3: Transmit mode 1 for Serial 0
Fig. 8-4: Receive mode 1 for Serial 0
8.1.3. Mode 2
This mode is similar to Mode 1, but with two differences. The baud rate is fixed at 1/32 (SMOD=1) or 1/64(SMOD=0) of
oscillator frequency, and 11 bits are transmitted or received: a start bit (0), 8 data bits (LSB first), a programmable Bit 9,
and a stop bit (1). Bit 9 can be used to control the parity of the serial interface: at transmission, bit TB80 in S0CON is
output as Bit 9, and at receive, Bit 9 affects RB80 in SFR S0CON.
8.1.4. Mode 3
The only difference between Mode 2 and Mode 3 is that: in Mode 3, either internal baud rate generator or timer 1 can be
use to specify baud rate.
Fig. 8-5: Transmit modes 2 and 3 for Serial 0
Specifications subject to change without notice contact your sales representatives for the most recent information.
ISSFD-M061
41
Ver.G SM59R02G1 09/2015