Hitachi SH7750 Hardware Manual page 746

Sh7750 series superh risc engine

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5. When modem control is enabled, the RTS2 signal is output when SCFRDR2 is empty. When

RTS2 is 0, reception is possible.

SH7750S, SH7750R: When RTS2 is 1, this indicates that SCFRDR2 contains a number of

Figure 16.12 shows an example of the operation when modem control is used.

Figure 16.12 Example of Operation Using Modem Control (RTS2

Rev. 6.0, 07/02, page 696 of 986

RXI interrupt

Figure 16.11 Example of SCIF Receive Operation

(Example with 8-Bit Data, Parity, One Stop Bit)

When RTS2 is 1, this indicates that SCFRDR2 contains 15 or more

bytes of data.

data bytes equal to or greater than the RTS2 output active trigger set

number. The RTS2 output active trigger value is specified by bits 10 to

8 in the FIFO control register (SCFCR2), described in section 16.2.9,

FIFO control register (SCFCR2).

RTS2 also becomes 1 when bit 4 (RE) in SCSCR2 is 0.

Data read and RDF flag

read as 1 then cleared to

0 by RXI interrupt handler

ERI interrupt request

generated by receive

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