Section 15 Serial Communication Interface with FIFO (SCIF)
Rev. 1.00 Mar. 12, 2008 Page 506 of 1178
REJ09B0403-0100
Figure 15.1 shows a block diagram of the SCIF.
LPC
interface
Inter
nal data b
u
s
Bus interf
ace
Modem
controller
P25/
RI
P24/
DCD
P26/
DSR
P27/
DTR
P64/
CTS
P65/
RTS
P50/TxDF
P51/RxDF
FRSR
FTSR
FTHR
FRBR
Transmit FIFO
(16 bytes)
Transmission
(1 byte)
Clock
selection/
divider
circuit
SCLK
FDLH
FDLL
Baud rate
generator
Transfer clock
SCIFCR
FIER
FIIR
FFCR
FLCR
FMCR
FLSR
FMSR
FSCR
Register
transmission/
reception
control
SCIF
interrupt
request
System clock
LCLK
Receive FIFO
(16 bytes)
Reception
(1 byte)
[Legend]
FRSR:
Receive shift register
FTSR:
Transmitter shift register
FRBR:
Receive buffer register
FTHR:
Transmitter holding register
FDLH, FDLL: Divisor latch H, L
FIER:
Interrupt enable register
FIIR:
Interrupt identification register
FFCR:
FIFO control register
FLCR:
Line control register
FMCR:
Modem control register
FLSR: Line
status
register
FMSR:
Modem status register
FSCR:
Scratch pad register
SCIFCR: SCIF control register
Figure 15.1 Block Diagram of SCIF
Содержание H8S Family
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Страница 552: ...Section 14 CRC Operation Circuit CRC Rev 1 00 Mar 12 2008 Page 504 of 1178 REJ09B0403 0100...
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Страница 632: ...Section 17 Synchronous Serial Communication Unit SSU Rev 1 00 Mar 12 2008 Page 584 of 1178 REJ09B0403 0100...
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