DF3052BX25V Renesas Electronics America, DF3052BX25V Datasheet - Page 512

• Manufacturer Part Number: DF3052BX25V
• Description: MCU 5V 512K 100-TQFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8/300Hr

Specifications of DF3052BX25V

• Core Processor: H8/300H
• Core Size: 16-Bit
• Speed: 25MHz
• Connectivity: SCI, SmartCard
• Peripherals: DMA, POR, PWM, WDT
• Number Of I /o: 70
• Program Memory Size: 512KB (512K x 8)
• Program Memory Type: FLASH
• Ram Size: 8K 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-TQFP, 100-VQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

Section 13 Serial Communication Interface
Rev. 3.00 Mar 21, 2006 page 482 of 814
REJ09B0302-0300
Transmitting Serial Data (Synchronous Mode)
Figure 13.16 shows a sample flowchart for transmitting serial data and indicates the procedure
to follow.
TDR and clear TDRE flag
Read TDRE flag in SSR
Read TEND flag in SSR
Clear TE bit to 0 in SCR
Write transmit data in
Start transmitting
transmitted?
TDRE = 1?
to 0 in SSR
TEND = 1?
Initialize
All data
End
Yes
Yes
Yes
Figure 13.16 Sample Flowchart for Serial Transmitting
No
No
No
1
2
3
1. SCI initialization: the transmit data output function
2. SCI status check and transmit data write: read
3. To continue transmitting serial data: after checking
of the TxD pin is selected automatically.
SSR, check that the TDRE flag is 1, then write
transmit data in TDR and clear the TDRE flag to 0.
that the TDRE flag is 1, indicating that data can be
written, write data in TDR, then clear the TDRE
flag to 0. When the DMAC is activated by a
transmit-data-empty interrupt request (TXI) to write
data in TDR, the TDRE flag is checked and
cleared automatically.