R4F24568NVFQV Renesas Electronics America, R4F24568NVFQV Datasheet - Page 950
![MCU 128KKB FLASH 48K 144-LQFP](/photos/28/61/286117/144-lqfp__plqp0144ka-a_sml.jpg)
R4F24568NVFQV
Manufacturer Part Number
R4F24568NVFQV
Description
MCU 128KKB FLASH 48K 144-LQFP
Manufacturer
Renesas Electronics America
Series
H8® H8S/2400r
Specifications of R4F24568NVFQV
Core Processor
H8S/2600
Core Size
16/32-Bit
Speed
32MHz
Connectivity
EBI/EMI, I²C, IrDA, SCI, SSU, UART/USART, USB
Peripherals
DMA, POR, PWM, WDT
Number Of I /o
96
Program Memory Size
256KB (256K x 8)
Program Memory Type
FLASH
Ram Size
48K x 8
Voltage - Supply (vcc/vdd)
3 V ~ 3.6 V
Data Converters
A/D 16x10b; D/A 2x8b
Oscillator Type
External
Operating Temperature
-20°C ~ 75°C
Package / Case
144-LQFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Available stocks
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Part Number:
R4F24568NVFQV
Manufacturer:
REA
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Manufacturer:
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Section 15 Serial Communication Interface (SCI, IrDA)
Page 920 of 1392
Figure 15.20 Sample Flowchart of Simultaneous Serial Transmit and Receive Operations
Note: When switching from transmit or receive operation to simultaneous
transmit and receive operations, first clear the TE and RE bits to 0,
then set both these bits to 1 simultaneously.
No
No
No
Clear TE and RE bits in SCR to 0
Write transmit data to TDR and
Read receive data in RDR, and
Start of transmission/reception
clear TDRE flag in SSR to 0
clear RDRF flag in SSR to 0
Read ORER flag in SSR
Read RDRF flag in SSR
Read TDRE flag in SSR
All data received?
Initialization
ORER = 1?
TDRE = 1?
RDRF = 1?
<End>
Yes
Yes
Yes
No
Error handling
Yes
[1]
[2]
[4]
[5]
[3]
[1]
[2]
[3]
[4]
[5]
SCI initialization:
The TxD pin is designated as the
transmit data output pin, and the
RxD pin is designated as the
receive data input pin, enabling
simultaneous transmit and receive
operations.
SCI status check and transmit data
write:
Read SSR and check that the
TDRE flag is set to 1, then write
transmit data to TDR and clear the
TDRE flag to 0.
Transition of the TDRE flag from 0 to
1 can also be identified by a TXI
interrupt.
Receive error handling:
If a receive error occurs, read the
ORER flag in SSR, and after
performing the appropriate error
handling, clear the ORER flag to 0.
Transmission/reception cannot be
resumed if the ORER flag is set to 1.
SCI status check and receive data
read:
Read SSR and check that the
RDRF flag is set to 1, then read the
receive data in RDR and clear the
RDRF flag to 0. Transition of the
RDRF flag from 0 to 1 can also be
identified by an RXI interrupt.
Serial transmission/reception
continuation procedure:
To continue serial transmission/
reception, before the MSB (bit 7) of
the current frame is received, finish
reading the RDRF flag, reading
RDR, and clearing the RDRF flag to
0. Also, before the MSB (bit 7) of
the current frame is transmitted,
read 1 from the TDRE flag to
confirm that writing is possible.
Then write data to TDR and clear
the TDRE flag to 0.
Checking and clearing of the TDRE
flag is automatic when the DMAC or
DTC is activated by a transmit-data-
empty interrupt (TXI) request and
data is written to TDR. Also, the
RDRF flag is cleared automatically
when the DMAC or DTC is activated
by a receive-data-full interrupt (RXI)
request and the RDR value is read.
H8S/2456, H8S/2456R, H8S/2454 Group
REJ09B0467-0350 Rev. 3.50
Jul 07, 2010
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