SH7616 Datasheet, PDF (675/935 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer SuperH™ RISC engine Family/SH7600 Series

Section 15 Serial I/O with FIFO (SIOF)
15.2.8 Transmit Control Data Register (SITCDR)
Bit: 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Initial value: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
R/W: R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W
SITCDR is a register that stores transmit control data.
Data should be written to SITCDR when the TCD bit is set to 1 in SISTR (SITCDR transmit data
invalid). If data is written to SITCDR when TCD in SISTR is cleared to 0, the previous data will
be overwritten. After writing transmit control data to SITCDR, 1 should be read from TCD in
SISTR and then 0 written to it. This makes the transmit data in SITCDR valid and causes the
transmit control data to be transmitted.
After TRMD in SIFCR is set to 1 transmission starts, a read interrupt is issued to SITCDR. STS
goes high and primary data bit 0 is transmitted as 1. When STS next goes high the control data
stored in SITCDR is transferred to SITSR. If the TCD bit is 0 at this point, and TCD bit is set to 1.
After this the control data previously transferred from SITCDR to SITSR is transmitted.
If the TRMD bit is cleared to 0, no control data is transmitted even if data is written to SITCDR.
If the TCD bit in SISTR is set to 1 and the TCIE bit in SICTR is set to 1, a transmit-control-data-
empty interrupt (TDEI0) request is sent to the INTC. If the flag is cleared, this interrupt request is
not generated.
The TCD bit in SISTR is set only by hardware.
SITCDR is initialized to H'0000 by a reset.
15.2.9 FIFO Control Register (SIFCR)
Bit: 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
    TRMD LM RFR TFR RFWM RFWM RFWM RFWM TFWM TFWM TFWM TFWM
ST ST 3
2
1
0
3
2
1
0
Initial value: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
R/W: R R R R R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W
SIFCR is a register used to perform software resets and to make threshold settings for SIRDR and
SITDR.
Rev. 2.00 Mar 09, 2006 page 649 of 906
REJ09B0292-0200