DF2117VT20V Renesas Electronics America, DF2117VT20V Datasheet - Page 819

• Manufacturer Part Number: DF2117VT20V
• Description: MCU 16BIT FLASH 3V 160K 144-TQFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2100r

Specifications of DF2117VT20V

• Core Processor: H8S/2600
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: FIFO, I²C, LPC, SCI, SmartCard
• Peripherals: POR, PWM, WDT
• Number Of I /o: 112
• Program Memory Size: 160KB (160K x 8)
• Program Memory Type: FLASH
• Ram Size: 8K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 V
• Data Converters: A/D 16x10b
• Oscillator Type: External
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 144-TQFP, 144-VQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

(1)
The SCI_1 is set to asynchronous mode, and the serial transmit/receive format is set to 8-bit data,
one stop bit, and no parity.
When a transition to boot mode is made, the boot program embedded in this LSI is initiated.
When the boot program is initiated, this LSI measures the low period of asynchronous serial
communication data (H'00) transmitted consecutively by the host, calculates the bit rate, and
adjusts the bit rate of the SCI_1 to match that of the host.
When bit rate adjustment is completed, this LSI transmits 1 byte of H'00 to the host as the bit
adjustment end sign. When the host receives this bit adjustment end sign normally, it transmits 1
byte of H'55 to this LSI. When reception is not executed normally, initiate boot mode again. The
bit rate may not be adjusted within the allowable range depending on the combination of the bit
rate of the host and the system clock frequency of this LSI. Therefore, the transfer bit rate of the
host and the system clock frequency of this LSI must be as shown in table 24.8.
Table 24.8 System Clock Frequency for Automatic-Bit-Rate Adjustment
Bit Rate of Host
9,600 bps
19,200 bps
Serial Interface Setting by Host
Figure 24.7 Automatic-Bit-Rate Adjustment Operation
Start
bit
D0
Measure low period (9 bits) (data is H'00)
D1
D2
D3
D4
System Clock Frequency of This LSI
8 to 20 MHz
8 to 20 MHz
D5
D6
Rev. 2.00 Sep. 28, 2009 Page 777 of 994
D7
Stop bit
High period of
at least 1 bit
REJ09B0452-0200