DF2268FA13V Renesas Electronics America, DF2268FA13V Datasheet - Page 396

• Manufacturer Part Number: DF2268FA13V
• Description: IC H8S/2268 MCU FLASH 100QFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2200r

Specifications of DF2268FA13V

• Core Processor: H8S/2000
• Core Size: 16-Bit
• Speed: 13MHz
• Connectivity: I²C, SCI, SmartCard
• Peripherals: LCD, POR, PWM, WDT
• Number Of I /o: 67
• Program Memory Size: 256KB (256K x 8)
• Program Memory Type: FLASH
• Ram Size: 16K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 5.5 V
• Data Converters: A/D 10x10b, D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 100-QFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

Section 13 Serial Communication Interface (SCI)
Figure 13.10 shows a sample flowchart for data transmission.
Rev. 5.00 Sep. 01, 2009 Page 344 of 656
REJ09B0071-0500
and clear TDRE flag in SSR to 0
Write transmit data to TDR
Read TDRE flag in SSR
Read TEND flag in SSR
Clear TE bit in SCR to 0
All data transmitted?
Clear DR to 0 and
Start transmission
Break output?
set DDR to 1
Figure 13.10 Sample Serial Transmission Flowchart
Initialization
TDRE = 1
TEND = 1
<End>
Yes
Yes
Yes
Yes
No
No
No
No
[1]
[2]
[3]
[4]
[1] SCI initialization:
[2] SCI status check and transmit data
[3] Serial transmission continuation
[4] Break output at the end of serial
Note: * The case, in which the DTC
The TxD pin is automatically
designated as the transmit data
output pin.
After the TE bit is set to 1, a frame
of 1s is output, and transmission is
enabled.
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.
procedure:
To continue serial transmission,
read 1 from the TDRE flag to
confirm that writing is possible,
then write data to TDR, and then
clear the TDRE flag to 0. Checking
and clearing of the TDRE flag is
automatic when the DTC * is
activated by a transmit data empty
interrupt (TXI) request, and data is
written to TDR. (H8S/2268 Group
only)
transmission:
To output a break in serial
transmission, set DR for the port
corresponding to the TxD pin to 0,
clear DDR to 1, then clear the TE
bit in SCR to 0.
automatically checks and
clears the TDRE flag, occurs
only when DISEL in DTC is 0
with the transfer counter not
being 0.
Therefore, the TDRE flag
should be cleared by CPU
when DISEL is 1, or when
DISEL is 0 with the transfer
counter being 0.