HD6417708RF100A Renesas Electronics America, HD6417708RF100A Datasheet - Page 414
HD6417708RF100A
Manufacturer Part Number
HD6417708RF100A
Description
IC SUPERH MPU ROMLESS 144LQFP
Manufacturer
Renesas Electronics America
Series
SuperH® SH7700r
Datasheet
1.HD6417708SF60V.pdf
(635 pages)
Specifications of HD6417708RF100A
Core Processor
SH-2
Core Size
32-Bit
Speed
100MHz
Connectivity
EBI/EMI, SCI, SmartCard
Peripherals
POR, WDT
Number Of I /o
8
Program Memory Type
ROMless
Voltage - Supply (vcc/vdd)
3.15 V ~ 3.6 V
Oscillator Type
External
Operating Temperature
-20°C ~ 75°C
Package / Case
144-LQFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-
Ram Size
-
Program Memory Size
-
Data Converters
-
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13.4
The SCI has four interrupt sources in each channel: transmit-end (TEI), receive-error (ERI),
receive-data-full (RXI), and transmit-data-empty (TXI). Table 13.13 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 (SCSCR). Each interrupt request is sent separately to the interrupt
controller.
TXI is requested when the TDRE bit in SCSSR is set to 1. TDRE is automatically cleared to 0
when data is written in the transmit data register (SCTDR).
RXI is requested when the RDRF bit in SCSSR is set to 1. RDRF is automatically cleared to 0
when the receive data register (SCRDR) is read.
ERI is requested when the ORER, PER, or FER bit in SCSSR is set to 1.
TEI is requested when the TEND bit in SCSSR is set to 1. Where the TXI interrupt indicates that
transmit data writing is enabled, the TEI interrupt indicates that the transmit operation is complete.
Table 13.13 SCI Interrupt Sources
Interrupt Source
ERI
RXI
TXI
TEI
See section 4, Exception Handling, for information on the priority order and relationship to non-
SCI interrupts.
13.5
Note the following points when using the SCI.
SCTDR Write and TDRE Flags: The TDRE bit in the serial status register (SCSSR) is a status
flag indicating loading of transmit data from SCTDR into SCTSR. The SCI sets TDRE to 1 when
it transfers data from SCTDR to SCTSR. Data can be written to SCTDR regardless of the TDRE
bit status. If new data is written in SCTDR when TDRE is 0, however, the old data stored in
SCTDR will be lost because the data has not yet been transferred to SCTSR. Before writing
transmit data to SCTDR, be sure to check that TDRE is set to 1.
394
SCI Interrupt Sources
Usage Notes
Description
Receive error (ORER, PER, or FER)
Receive data full (RDRF)
Transmit data empty (TDRE)
Transmit end (TEND)
Priority When Reset Is Cleared
High
Low
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