SM59R16A5 Datasheet, PDF (43/89 Pages) SyncMOS Technologies,Inc – Two serial peripheral interfaces in full duplex mode

SM59R16A5/SM59R09A5/SM59R05A5
8-Bit Micro-controller
64KB/36KB/20KB with ISP Flash
& 2KB RAM embedded
SM20: Enables multiprocessor communication feature
REN0: If set, enables serial reception. Cleared by software to disable reception.
TB80: The 9^th transmitted data bit in modes 2 and 3. Set or cleared by the CPU
depending on the function it performs such as parity check, multiprocessor
communication etc.
RB80: In modes 2 and 3, it is the 9^th data bit received. In mode 1, if SM20 is 0, RB80
is the stop bit. In mode 0, this bit is not used. Must be cleared by software.
TI0: Transmit interrupt flag, set by hardware after completion of a serial transfer.
Must be cleared by software.
RI0: Receive interrupt flag, set by hardware after completion of a serial reception.
Must be cleared by software.
Mnemonic: S1CON
Address: 9Bh
7
6
5
4
3
2
1
0 Reset
SM
-
SM21 REN1 TB81 RB81 TI1
RI1 00h
SM: Serial Port 1 mode select.
SM Mode
0
A
1
B
The 2 modes in UART1, Mode A and Mode B, are explained later.
SM21: Enables multiprocessor communication feature.
REN1: If set, enables serial reception. Cleared by software to disable reception.
TB81: The 9^th transmitted data bit in mode A. Set or cleared by the CPU depending on
the function it performs such as parity check, multiprocessor communication
etc.
RB81: In mode A, it is the 9^th data bit received. In mode B, if SM21 is 0, RB81 is the
stop bit. Must be cleared by software.
TI1: Transmit interrupt flag, set by hardware after completion of a serial transfer.
Must be cleared by software.
RI1: Receive interrupt flag, set by hardware after completion of a serial reception.
Must be cleared by software.
9.1. Serial interface 0
The Serial Interface 0 can operate in the following 4 modes:
SM0
0
0
1
1
SM1
0
1
0
1
Mode
0
1
2
3
Description
Shift register
8-bit UART
9-bit UART
9-bit UART
Board Rate
Fosc/12
Variable
Fosc/32 or Fosc/64
Variable
Here Fosc is the crystal or oscillator frequency.
9.1.1. Mode 0
Pin RXD0 serves as input and output. TXD0 outputs the shift clock. 8 bits are transmitted with LSB first. The baud
rate is fixed at 1/12 of the crystal frequency. Reception is initialized in Mode 0 by setting the flags in S0CON as follows:
RI0 = 0 and REN0 = 1. In the other modes, a start bit when REN0 = 1 starts receiving serial data.
Specifications subject to change without notice contact your sales representatives for the most recent information.
ISSFD-M047
43
Ver.H SM59R16A5 04/2015