DF3052BX25V Renesas Electronics America, DF3052BX25V Datasheet - Page 547
DF3052BX25V
Manufacturer Part Number
DF3052BX25V
Description
MCU 5V 512K 100-TQFP
Manufacturer
Renesas Electronics America
Series
H8® H8/300Hr
Specifications of DF3052BX25V
Core Processor
H8/300H
Core Size
16-Bit
Speed
25MHz
Connectivity
SCI, SmartCard
Peripherals
DMA, POR, PWM, WDT
Number Of I /o
70
Program Memory Size
512KB (512K x 8)
Program Memory Type
FLASH
Ram Size
8K 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
Lead free / RoHS Compliant
Eeprom Size
-
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
DF3052BX25V
Manufacturer:
Renesas Electronics America
Quantity:
10 000
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14.4
When using the SCI as a smart card interface, note the following points.
Receive Data Sampling Timing in Smart Card Mode and Receive Margin: In smart card mode
the SCI operates on a base clock with 372 times the bit rate frequency. In receiving, 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. See figure 14.10.
The receive margin can therefore be expressed as follows.
Receive margin in smart card mode:
Internal
base clock
Receive data
(RxD)
Synchronization
sampling timing
Data sampling
timing
M =
M: Receive margin (%)
N: Ratio of clock frequency to bit rate (N = 372)
D: Clock duty cycle (D = 0 to 1.0)
L: Frame length (L = 10)
F: Absolute deviation of clock frequency
Usage Notes
Figure 14.10 Receive Data Sampling Timing in Smart Card Mode
0.5 –
2N
0
1
186 clocks
– (L – 0.5) F –
185
372 clocks
Start
bit
371
D – 0.5
N
0
D0
(1 + F)
Rev. 3.00 Mar 21, 2006 page 517 of 814
100%
Section 14 Smart Card Interface
185
REJ09B0302-0300
371
0
D1
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