SH7147 Datasheet, PDF (552/1108 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer SuperH™ RISC engine Family

Section 13 Serial Communication Interface (SCI)
• 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. The data transfer controller (DTC) can be activated by the transmit-data-empty
interrupt or receive-data-full interrupt to transfer data.
• Module standby mode can be set
Figure 13.1 shows a block diagram of the SCI.
RXD
TXD
SCK
SCRDR
SCRSR
Module data bus
SCTDR
SCSSR
SCSCR
SCBRR
SCTSR
SCSMR
SCSPTR
SCSDCR
Transmission/reception
control
Baud rate
generator
Parity generation
Parity check
Clock
External clock
SCI
[Legend]
SCRSR: Receive shift register
SCRDR: Receive data register
SCTSR:
SCTDR:
SCSMR:
SCSCR:
Transmit shift register
Transmit data register
Serial mode register
Serial control register
SCSSR: Serial status register
SCBRR: Bit rate register
SCSPTR: Serial port register
SCSDCR: Serial direction control register
Figure 13.1 Block Diagram of SCI
Internal
data bus
Pφ
Pφ/4
Pφ/16
Pφ/64
TEI
TXI
RXI
ERI
Rev. 3.00 Oct. 06, 2008 Page 528 of 1080
REJ09B0230-0300