DF2148BFA20 Renesas Electronics America, DF2148BFA20 Datasheet - Page 454
DF2148BFA20
Manufacturer Part Number
DF2148BFA20
Description
IC H8S MCU FLASH 128K 100-QFP
Manufacturer
Renesas Electronics America
Series
H8® H8S/2100r
Specifications of DF2148BFA20
Core Processor
H8S/2000
Core Size
16-Bit
Speed
20MHz
Connectivity
I²C, IrDA, SCI, X-Bus
Peripherals
PWM, WDT
Number Of I /o
74
Program Memory Size
128KB (128K x 8)
Program Memory Type
FLASH
Ram Size
4K x 8
Voltage - Supply (vcc/vdd)
4.5 V ~ 5.5 V
Data Converters
A/D 8x10b; D/A 2x8b
Oscillator Type
Internal
Operating Temperature
-20°C ~ 75°C
Package / Case
100-QFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-
Other names
HD64F2148BFA20
HD64F2148BFA20
HD64F2148BFA20
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Section 15 Serial Communication Interface (SCI and IrDA)
15.6.4
Figure 15.18 shows an example of SCI operation for reception in clocked synchronous mode. In
serial reception, the SCI operates as described below.
1. The SCI performs internal initialization in synchronization with a synchronization clock input
2. If an overrun error (when reception of the next data is completed while the RDRF flag is still
3. If reception finishes successfully, the RDRF bit in SSR is set to 1, and receive data is
Reception cannot be resumed while a receive error flag is set to 1. Accordingly, clear the ORER,
FER, PER, and RDRF bits to 0 before resuming reception. Figure 15.19 shows a sample flowchart
for serial data reception.
Rev. 3.00 Mar 21, 2006 page 398 of 788
REJ09B0300-0300
Synchronization
clock
Serial data
RDRF
ORER
or output, starts receiving data, and stores the receive data in RSR.
set to 1) occurs, the ORER bit in SSR is set to 1. If the RIE bit in SCR is set to 1 at this time,
an ERI interrupt request is generated. Receive data is not transferred to RDR. The RDRF flag
remains to be set to 1.
transferred to RDR. If the RIE bit in SCR is set to 1 at this time, an RXI interrupt request is
generated. Because the RXI interrupt routine reads the receive data transferred to RDR before
reception of the next receive data has finished, continuous reception can be enabled.
Figure 15.18 Example of SCI Receive Operation in Clocked Synchronous Mode
Serial Data Reception (Clocked Synchronous Mode)
RXI interrupt
request
generated
Bit 7
Bit 0
RDR data read and
RDRF flag cleared
to 0 in RXI interrupt
handling routine
1 frame
Bit 7
Bit 0
RXI interrupt
request generated
Bit 1
ERI interrupt request
generated by overrun
error
Bit 6
Bit 7
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