DF2437FV Renesas Electronics America, DF2437FV Datasheet - Page 524

• Manufacturer Part Number: DF2437FV
• Description: IC H8S/2437 MCU FLASH 128QFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2400r

Specifications of DF2437FV

• Core Processor: H8S/2600
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: I²C, SCI
• Peripherals: POR, PWM, WDT
• Number Of I /o: 85
• Program Memory Size: 256KB (256K x 8)
• Program Memory Type: FLASH
• Ram Size: 16K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 V
• Data Converters: A/D 16x10b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 128-QFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

16.6.4
Figure 16.18 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 in SSR
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 flags to 0 before resuming reception. Figure 16.19 shows a sample
flowchart for serial data reception.
Rev.2.00 May. 28, 2009 Page 484 of 732
REJ09B0059-0200
Synchronization
clock
Serial data
RDRF
ORER
or output, starts receiving data, and stores the receive data in RSR.
is still 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. If the RXI interrupt processing routine reads the receive data transferred to RDR
before reception of the next receive data has finished, continuous reception can be enabled.
Figure 16.18 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
processing routine
1 frame
Bit 7
Bit 0
RXI interrupt
request generated
Bit 1
ERI interrupt request
generated by overrun
error
Bit 6
Bit 7