DF2345TE20 Renesas Electronics America, DF2345TE20 Datasheet - Page 529

• Manufacturer Part Number: DF2345TE20
• Description: MCU 5V 128K 100-TQFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2300r

Specifications of DF2345TE20

• Core Processor: H8S/2000
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: SCI, SmartCard
• Peripherals: POR, PWM, WDT
• Number Of I /o: 71
• Program Memory Size: 128KB (128K x 8)
• Program Memory Type: FLASH
• Ram Size: 4K x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 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: -
• Other names: HD64F2345TE20; HD64F2345TE20

Thus the reception margin in smart card interface mode is given by the following formula.
Where M: Reception margin (%)
Assuming values of F = 0 and D = 0.5 in the above formula, the reception margin formula is as
follows.
When D = 0.5 and F = 0,
Internal
basic
clock
Receive
data (RxD)
Synchro-
nization
sampling
timing
Data
sampling
timing
N: Ratio of bit rate to clock (N = 372)
D: Clock duty (D = 0 to 1.0)
L: Frame length (L = 10)
F: Absolute value of clock frequency deviation
M = (0.5 –
M = (0.5 – 1/2
= 49.866%
Figure 13.10 Receive Data Sampling Timing in Smart Card Mode
0
186 clocks
2N
1
185
372 clocks
Start bit
) – (L – 0.5) F –
372)
100%
371
0
D – 0.5
N
D0
(1 + F)
Rev. 4.00 Feb 15, 2006 page 503 of 900
100%
Section 13 Smart Card Interface
185
REJ09B0291-0400
371 0
D1