HD64F3026X25 Renesas Electronics America, HD64F3026X25 Datasheet - Page 477

• Manufacturer Part Number: HD64F3026X25
• Description: MCU 3V 256K 100-TQFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8/300Hr

Specifications of HD64F3026X25

• 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: Contains lead / RoHS non-compliant
• Eeprom Size: -

Use the following procedure to secure the clock duty cycle after powering on.
1. The initial state is port input and high-impedance. Use pull-up or pull-down resistors to fix the
2. Fix at the output specified by the CKE1 bit in SCR.
3. Set SMR and SCMR, and switch to smart card interface mode operation.
4. Set the CKE0 bit to 1 in SCR to start clock output.
13.4
The following points should be noted when using the SCI as a smart card interface.
Receive Data Sampling Timing and Receive Margin in Smart Card Interface Mode: In smart
card interface mode, the SCI operates on a base clock with a frequency of 372 times the transfer
rate. In reception, the SCI synchronizes internally with the fall of the start bit, which it samples on
the base clock. Receive data is latched at the rising edge of the 186th base clock pulse. The timing
is shown in figure 13.11.
Internal base
clock
Receive data
(RxD)
Synchronization
sampling timing
Data sampling
timing
potential.
Figure 13.11 Receive Data Sampling Timing in Smart Card Interface Mode
Usage Notes
0
186 clocks
185
372 clocks
Start bit
371
0
D0
Rev. 2.00 Sep 20, 2005 page 437 of 800
Section 13 Smart Card Interface
185
REJ09B0260-0200
371 0
D1