Section 12 Serial Communication Interface (SCI)
Rev. 3.00 Sep. 27, 2007 Page 412 of 758
REJ09B0243-0300
•
Four types of interrupts: There are four interrupt sources, transmit-data-empty, transmit end,
receive-data-full, and receive error interrupts, and each interrupt can be requested
independently.
•
Module standby mode can be set
Figure 12.1 shows a block diagram of the SCI.
Receive shift register
Receive data register
Transmit shift register
Transmit data register
Serial mode register
Serial control register
Serial status register
Bit rate register
Serial port register
Serial direction control register
Internal
data bus
P
φ
SCRDR
Module data bus
SCTDR
SCRSR
SCTSR
SCSSR
SCSMR
SCSPTR
SCSCR
SCSDCR
SCBRR
Transmission/reception
control
Baud rate
generator
Clock
TEI
TXI
RXI
ERI
External clock
Parity generation
Parity check
P
φ
/4
P
φ
/16
P
φ
/64
SCK
TXD
RXD
SCI
[Legend]
SCRSR:
SCRDR:
SCTSR:
SCTDR:
SCSMR:
SCSCR:
SCSSR:
SCBRR:
SCSPTR:
SCSDCR:
Bus interface
Figure 12.1 Block Diagram of SCI
Содержание SH7124 R5F7124
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