HD64F3067RF20 Renesas Electronics America, HD64F3067RF20 Datasheet - Page 538

• Manufacturer Part Number: HD64F3067RF20
• Description: IC H8 MCU FLASH 128K 100-QFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8/300Hr

Specifications of HD64F3067RF20

• Core Processor: H8/300H
• Core Size: 16-Bit
• Speed: 20MHz
• 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
• Package: 100PQFP
• Family Name: H8
• Maximum Speed: 20 MHz
• Operating Supply Voltage: 5 V
• Data Bus Width: 16|32 Bit
• Number Of Programmable I/os: 70
• Interface Type: SCI
• On-chip Adc: 8-chx10-bit
• On-chip Dac: 2-chx8-bit
• Number Of Timers: 7
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -

Section 13 Serial Communication Interface
Rev. 4.00 Jan 26, 2006 page 514 of 938
REJ09B0276-0400
and clear TDRE flag to 0 in SSR
Transmitting Serial Data (Asynchronous Mode): Figure 13.5 shows a sample flowchart for
transmitting serial data and indicates the procedure to follow.
Write transmit data in TDR
Clear DR bit to 0 and set
Clear TE bit to 0 in SCR
Read TDRE flag in SSR
Read TEND flag in SSR
Output break signal?
All data transmitted?
Start transmitting
DDR bit to 1
TEND = 1
TDRE = 1
Initialize
<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 and check that the TDRE flag is set to 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, then
clear the TE bit to 0 in SCR.