HD64F2638F20J Renesas Electronics America, HD64F2638F20J Datasheet - Page 591

• Manufacturer Part Number: HD64F2638F20J
• Description: IC H8S MCU FLASH 256K 128-QFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2600r

Specifications of HD64F2638F20J

• Core Processor: H8S/2600
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: CAN, SCI, SmartCard
• Peripherals: Motor Control PWM, POR, PWM, WDT
• Number Of I /o: 72
• Program Memory Size: 256KB (256K x 8)
• Program Memory Type: FLASH
• Ram Size: 16K x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Data Converters: A/D 12x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 128-QFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -

H8S/2639, H8S/2638, H8S/2636,
H8S/2630, H8S/2635 Group
14.4
The following points should be noted when using the SCI as a Smart Card interface.
Receive Data Sampling Timing and Reception Margin in Smart Card Interface Mode: In
Smart Card interface mode, the SCI operates on a basic clock with a frequency of 32, 64, 372, or
256 times the transfer rate (as determined by bits BCP1 and BCP0).
In reception, the SCI samples the falling edge of the start bit using the basic clock, and performs
internal synchronization. Receive data is latched internally at the rising edge of the 16th, 32nd,
186th, or 128th pulse of the basic clock. Figure 14-10 shows the receive data sampling timing
when using a clock of 372 times the transfer rate.
REJ09B0103-0800 Rev. 8.00
May 28, 2010
Internal
basic
clock
Receive
data (RxD)
Synchro-
nization
sampling
timing
Data
sampling
timing
Usage Notes
Figure 14-10 Receive Data Sampling Timing in Smart Card Mode
0
186 clocks
185
372 clocks
(Using Clock of 372 Times the Transfer Rate)
Start bit
371
0
D0
185
Section 14 Smart Card Interface
371 0
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