HD64F7050 RENESAS [Renesas Technology Corp], HD64F7050 Datasheet - Page 445
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HD64F7050
Manufacturer Part Number
HD64F7050
Description
32-Bit RISC Microcomputer SuperH RISC engine Family/
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
1.HD64F7050.pdf
(841 pages)
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13.4
The SCI has four interrupt sources: transmit-end (TEI), receive-error (ERI), receive-data-full
(RxI), and transmit-data-empty (TxI). Table 13.12 lists the interrupt sources and indicates their
priority. These interrupts can be enabled and disabled by the TIE, RIE, and TEIE bits in the serial
control register (SCR). Each interrupt request is sent separately to the interrupt controller.
TxI is requested when the TDRE bit in the SSR is set to 1. TxI can start the direct memory access
controller (DMAC) to transfer data. TDRE is automatically cleared to 0 when the DMAC writes
data in the transmit data register (TDR).
RxI is requested when the RDRF bit in the SSR is set to 1. RxI can start the DMAC to transfer
data. RDRF is automatically cleared to 0 when the DMAC reads the receive data register (RDR).
ERI is requested when the ORER, PER, or FER bit in the SSR is set to 1. ERI cannot start the
DMAC.
TEI is requested when the TEND bit in the SSR is set to 1. TEI cannot start the DMAC. Where the
TxI interrupt indicates that transmit data writing is enabled, the TEI interrupt indicates that the
transmit operation is complete.
Table 13.12 SCI Interrupt Sources
Interrupt Source
ERI
RxI
TxI
TEI
SCI Interrupt Sources and the DMAC
Description
Receive error (ORER, PER, or FER)
Receive data full (RDRF)
Transmit data empty (TDRE)
Transmit end (TEND)
Section 13 Serial Communication Interface (SCI)
Rev. 5.00 Jan 06, 2006 page 425 of 818
DMAC Activation
No
Yes
Yes
No
REJ09B0273-0500
Priority
High
Low
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