ST90158 - MULTIPROTOCOL SERIAL COMMUNICATIONS INTERFACE (SCI-M)
MULTIPROTOCOL SERIAL COMMUNICATIONS INTERFACE (Cont’d)
9.6.3 Functional Description
The SCI-M has four operating modes:
– Asynchronous mode
Asynchronous mode, Asynchronous mode with
synchronous clock and Serial expansion mode
output data with the same serial frame format. The
differences lie in the data sampling clock rates
(1X, 16X) and in the protocol used.
– Asynchronous mode with synchronous clock
– Serial expansion mode
– Synchronous mode
Figure 77. SCI -M Functional Schematic
INPL (*)
INTCLK
XBRG
RX buffer
register
RX shift
register
Baud rate
LBEN (*)
Sin
generator
RXclk
1
0
LBEN
Divider by 16
CD
1
OUTPL (*)
XRX
INPEN (*)
OCKPL (*)
Divider by 16
0
TX shift
Sout
register
CD
OCLK
AEN
OUTSB (*)
TX buffer
register
DCDEN (*)
AEN (*)
Enveloper
OCLK
Polarity
Polarity
OCKSB (*)
XTCLK
AEN (*)
RTSEN (*)
VR02054
TXclk / CLKout
DCD
RTS
The control signals marked with (*) are active only in synchronous mode (SMEN=1)
Note: Some pins may not be available on some devices. Refer to the device Pinout Description.
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ETC [ ETC ]
