
S1C6F567 TECHNICAL MANUAL
EPSON
75
CHAPTER 4: PERIPHERAL CIRCUITS AND OPERATION (Serial Interface)
7-bit asynchronous mode
In this mode, 7-bit asynchronous transfer can be performed. Parity check during data reception and
addition of parity bit (odd/even/none) during transmitting can be specified and data processed in 7
bits with or without parity. Since this mode employs the internal clock, the SCLK terminal is not used.
Furthermore, since the SRDY terminal is not utilized either, both of these terminals can be used as I/O
ports.
Figure 4.11.3.1(c) shows the connection example of input/output terminals in the asynchronous mode.
8-bit asynchronous 8-bit mode
In this mode, 8-bit asynchronous transfer can be performed. Parity check during data reception and
addition of parity bit (odd/even/none) during transmitting can be specified and data processed in 8
bits with or without parity. Since this mode employs the internal clock, the SCLK terminal is not used.
Furthermore, since the SRDY terminal is not utilized either, both of these terminals can be used as I/O
ports.
Figure 4.11.3.1(c) shows the connection example of input/output terminals in the asynchronous mode.
Data input
Data output
CLOCK input
READY output
SIN(P10)
SOUT(P11)
SCLK(P12)
Input port(Kxx)
External
serial device
S1C6F567
(a) Clock synchronous master mode
Data input
Data output
CLOCK output
READY input
SIN(P10)
SOUT(P11)
SCLK(P12)
SRDY(P13)
External
serial device
S1C6F567
(b) Clock synchronous slave mode
Data input
Data output
SIN(P10)
SOUT(P11)
External
serial device
S1C6F567
(c) Asynchronous 7-bit/8-bit mode
Fig. 4.11.3.1 Connection examples of serial interface I/O terminals