HD6413007F20 Renesas Electronics America, HD6413007F20 Datasheet - Page 539

• Manufacturer Part Number: HD6413007F20
• Description: IC H8 MCU ROMLESS 5V 100QFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8/300Hr

Specifications of HD6413007F20

• Core Processor: H8/300H
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: SCI, SmartCard
• Peripherals: DMA, PWM, WDT
• Number Of I /o: 35
• Program Memory Type: ROMless
• Ram Size: 4K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 8x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 100-QFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Program Memory Size: -

14.4
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 14.11.
The receive margin can therefore be expressed as follows.
Receive margin in smart card interface mode:
Internal base
clock
Receive data
(RxD)
Synchronization
sampling timing
Data sampling
timing
Figure 14.11 Receive Data Sampling Timing in Smart Card Interface Mode
M = (0.5 –
M: Receive margin (%)
N:
Usage Notes
Ratio of clock frequency to bit rate (N = 372)
0
186 clocks
2N
1
185
) – (L – 0.5) F –
372 clocks
Start bit
371
D – 0.5
0
N
D0
(1 + F) × 100%
Rev.5.00 Sep. 12, 2007 Page 509 of 764
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14. Smart Card Interface
REJ09B0396-0500
371 0
D1