DF3026X25V Renesas Electronics America, DF3026X25V Datasheet - Page 435
![MCU 3V 256K PB-FREE 100-TQFP](/photos/28/61/286123/100-tqfp__100-vqfp_sml.jpg)
DF3026X25V
Manufacturer Part Number
DF3026X25V
Description
MCU 3V 256K PB-FREE 100-TQFP
Manufacturer
Renesas Electronics America
Series
H8® H8/300Hr
Specifications of DF3026X25V
Core Processor
H8/300H
Core Size
16-Bit
Speed
25MHz
Connectivity
SCI, SmartCard
Peripherals
PWM, WDT
Number Of I /o
70
Program Memory Size
256KB (256K x 8)
Program Memory Type
FLASH
Ram Size
8K x 8
Voltage - Supply (vcc/vdd)
3 V ~ 3.6 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
-
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
DF3026X25V
Manufacturer:
Renesas Electronics America
Quantity:
10 000
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In transmitting serial data, the SCI operates as follows:
Figure 12.11 shows an example of SCI transmit operation using a multiprocessor format.
Receiving Multiprocessor Serial Data: Figure 12.12 shows a sample flowchart for receiving
multiprocessor serial data and indicates the procedure to follow.
TDRE
TEND
The SCI monitors the TDRE flag in SSR. When the TDRE flag is cleared to 0, the SCI
recognizes that TDR contains new data, and loads this data from TDR into TSR.
After loading the data from TDR to TSR, the SCI sets the TDRE flag to 1 and starts
transmitting. If the TIE bit is set to 1 in SCR, the SCI requests a transmit-data-empty interrupt
(TXI) at this time.
Serial transmit data is transmitted in the following order from the TxD pin:
The SCI checks the TDRE flag when it outputs the stop bit. If the TDRE flag is 0, the SCI
loads new data from TDR into TSR, outputs the stop bit, then begins serial transmission of the
next frame. If the TDRE flag is 1, the SCI sets the TEND flag to 1 in SSR, outputs the stop
bit, then continues output of 1 bits in the mark state. If the TEIE bit is set to 1 in SCR, a
transmit-end interrupt (TEI) is requested at this time.
TXI interrupt
request
1
Start bit: One 0 bit is output.
Transmit data: 7 or 8 bits are output, LSB first.
Multiprocessor bit: One multiprocessor bit (MPBT value) is output.
Stop bit(s): One or two 1 bits (stop bits) are output.
Mark state: Output of 1 bits continues until the start bit of the next transmit data.
Start
bit
0
TXI interrupt handler
writes data in TDR and
clears TDRE flag to 0
D0
(8-Bit Data with Multiprocessor Bit and One Stop Bit)
Figure 12.11 Example of SCI Transmit Operation
D1
1 frame
Data
D7
processor
Multi-
TXI interrupt
request
0/1
bit
Stop
bit
1
Start
bit
0
Section 12 Serial Communication Interface
D0
Rev. 2.00 Sep 20, 2005 page 395 of 800
D1
Data
D7
processor
Multi-
bit
0/1
REJ09B0260-0200
TEI interrupt
request
Stop
bit
1
Idle (mark)
state
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