HD64F3048BF25 Renesas Electronics America, HD64F3048BF25 Datasheet - Page 515

• Manufacturer Part Number: HD64F3048BF25
• Description: IC H8 MCU FLASH 128K 100QFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8/300Hr

Specifications of HD64F3048BF25

• Core Processor: H8/300H
• Core Size: 16-Bit
• Speed: 8MHz
• Connectivity: SCI, SmartCard
• Peripherals: DMA, PWM, WDT
• Number Of I /o: 70
• 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: -

Transmitting Serial Data (Asynchronous Mode): Figure 13.5 shows a sample flowchart for
transmitting serial data and indicates the procedure to follow.
Read TDRE flag in SSR
Read TEND flag in SSR
Clear TE bit to 0 in SCR
in TDR and clear TDRE
Write transmit data
Clear DR bit to 0,
Start transmitting
set DDR bit to 1
flag to 0 in SSR
Output break
transmitted?
TDRE = 1?
TEND = 1?
Initialize
All data
signal?
End
Figure 13.5 Sample Flowchart for Transmitting Serial Data
Yes
Yes
Yes
Yes
No
No
No
No
1
2
3
4
1.
2.
3.
4.
SCI initialization: the transmit data output function
of the TxD pin is selected automatically.
SCI status check and transmit data write: read SSR,
check that the TDRE flag is 1, then write transmit data
in TDR and clear the TDRE flag to 0.
To continue transmitting serial data: after checking
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.
To output a break signal at the end of serial transmission:
set the DDR bit to 1 and clear the DR bit to 0
(DDR and DR are I/O port registers), then clear the
TE bit to 0 in SCR.
Section 13 Serial Communication Interface
Rev. 3.00 Sep 27, 2006 page 487 of 872
REJ09B0325-0300