DF3048X16V Renesas Electronics America, DF3048X16V Datasheet - Page 521

• Manufacturer Part Number: DF3048X16V
• Description: MCU 5V 128K,PB-FREE 100-TQFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8/300Hr

Specifications of DF3048X16V

• Core Processor: H8/300H
• Core Size: 16-Bit
• Speed: 16MHz
• 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-TQFP, 100-VQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

Transmitting and Receiving Data
SCI Initialization (Synchronous Mode)
Before transmitting or receiving, clear the TE and
RE bits to 0 in SCR, then initialize the SCI as follows.
When changing the communication mode or format, always clear the TE and RE bits to 0
before following the procedure given below. Clearing the TE bit to 0 sets the TDRE flag to 1
and initializes TSR. Clearing the RE bit to 0, however, does not initialize the RDRF, PER,
FER, and ORE flags and RDR, which retain their previous contents.
Figure 13.15 is a sample flowchart for initializing the SCI.
CKE1, and CKE0 bits in SCR
Start transmitting or receiving
Set RIE, TIE, TEIE, MPIE,
Set TE or RE to 1 in SCR
(leaving TE and RE bits
Set RIE, TIE, TEIE, and
MPIE bits as necessary
Select communication
Start of initialization
Set value in BRR
Clear TE and RE
bits to 0 in SCR
format in SMR
cleared to 0)
1 bit interval
elapsed?
Yes
Figure 13.15 Sample Flowchart for SCI Initialization
Wait
No
1
2
3
4
Note: In simultaneous transmitting and receiving, the TE and
1.
2.
3.
4.
Select the clock source in SCR. Clear the RIE, TIE, TEIE,
MPIE, TE, and RE bits to 0.
Select the communication format in SMR.
Write the value corresponding to the bit rate in BRR.
This step is not necessary when an external clock is used.
Wait for at least the interval required to transmit or receive
one bit, then set the TE or RE bit to 1 in SCR. Also set
the RIE, TIE, TEIE, and MPIE bits as necessary.
Setting the TE or RE bit enables the SCI to use the
TxD or RxD pin.
RE bits should be cleared to 0 or set to 1 simultaneously.
Section 13 Serial Communication Interface
Rev. 7.00 Sep 21, 2005 page 495 of 878
REJ09B0259-0700