Table of Contents
Advertisement
Start
1
bit
Serial
0
D0
data
RDF
FER
5. When modem control is enabled, the 5765 signal is output when SCFRDR2 is empty.
When 5765 is 1, this indicates that SCFRDR2 contains 15 or more bytes of data.
SH7750:
SH7750S: When 5765 is 0, reception is possible. When 5765 is 1, this indicates that
SCFRDR2 contains 15 or more bytes of data.
Figure 16.13 shows an example of the operation when modem control is used.
Start
bit
Serial data
0
D0
RxD2
RTS2
Figure 16.13 Example of Operation Using Modem Control (5765
Data
Parity
bit
D1
D7
0/1
RXI interrupt
request
One frame
Figure 16.12 Example of SCIF Receive Operation
(Example with 8-Bit Data, Parity, One Stop Bit)
Parity
bit
D1 D2
D7 0/1 1
Stop
Start
bit
bit
1
0
D0
D1
Data read and RDF flag
read as 1 then cleared to
0 by RXI interrupt handler
Stop
bit
Data
Parity
Stop
bit
bit
D7
0/1
0
ERI interrupt request
generated by receive
error
Start
bit
0
5765)
5765
5765
Rev. 4.0, 04/00, page 605 of 850
0/1
Advertisement
Table of Contents
