SH7727 Datasheet, PDF (718/1109 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperH RISC engine Family/SH7700 Series

Section 20 Serial IO (SIOF)
20.3.8 Interrupt
SIOF has the following four types of interrupt. These types are reflected to IRR4 register in
interrupt controller (INTC).
• Transmit interrupt (TXI)
• Receive interrupt (RXI)
• Control interrupt (CCI)
• Error interrupt (ERI)
(1) Interrupt Factor
Each interrupt is submitted by its multiple factors. Each factor is shown in SIOF register as SIOF
states. Table 20.12 shows SIOF interrupt factors.
Table 20.12 SIOF Interrupt Factors
No. Type
Bit
1
Transmit TDREQ
(TXI)
2
Receive RDREQ
(RXI)
3
Control TCRDY
(CCI)
4
RCRDY
Function
Transmit FIFO send request
Receive FIFO send request
Transmit control data ready
Receive control data ready
5
6
7
Error
(ERI)
TFEMP
RFFUL
TFUDF
Transmit FIFO empty
Receive FIFO full
Transmit FIFO under flow
8
TFOVF
Transmit FIFO over flow
9
RFOVF
Receive FIFO over flow
10
RFUDF
Receive FIFO under flow
11
FSERR
F3 error
Explanation of Interrupt
Data of over setting is stared to
transmit FIFO
Data of over setting is stared to
receive FIFO
Enable writing into transmit
control data register
Valid data is stored in receive
control data register
Transmit FIFO is empty
Receive FIFO is full
The serial data send timing
comes when transmit FIFO is
empty
Write to transit FIFO when
transmit FIFO is full
Receive serial data when
receive FIFO is full
Read receive FIFO when
receive FIFO is empty
Serial signal is received before
setting bit number (at slave)
Rev. 5.00 Dec 12, 2005 page 646 of 1034
REJ09B0254-0500