DF2266TF13V Renesas Electronics America, DF2266TF13V Datasheet - Page 392

IC H8S/2266 MCU FLASH 100-TQFP

DF2266TF13V

Manufacturer Part Number
DF2266TF13V
Description
IC H8S/2266 MCU FLASH 100-TQFP
Manufacturer
Renesas Electronics America
Series
H8® H8S/2200r
Datasheet

Specifications of DF2266TF13V

Core Processor
H8S/2000
Core Size
16-Bit
Speed
13MHz
Connectivity
I²C, SCI, SmartCard
Peripherals
LCD, POR, PWM, WDT
Number Of I /o
67
Program Memory Size
128KB (128K x 8)
Program Memory Type
FLASH
Ram Size
8K x 8
Voltage - Supply (vcc/vdd)
3 V ~ 5.5 V
Data Converters
A/D 10x10b
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
-
Section 13 Serial Communication Interface (SCI)
13.4.2
In asynchronous mode, the SCI operates on a basic clock with a frequency of 16 times the transfer
rate. 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 8th
pulse of the basic clock as shown in figure 13.6. Thus, the reception margin in asynchronous mode
is given by formula (1) below.
Where M: Reception margin (%)
Assuming values of F (absolute value of clock rate deviation) = 0, D (clock duty) = 0.5, and N
(ratio of bit rate to clock) = 16 in formula (1), the reception margin can be given by the formula.
However, this is only the computed value, and a margin of 20% to 30% should be allowed for in
system design.
Rev. 5.00 Sep. 01, 2009 Page 340 of 656
REJ09B0071-0500
M = | (0.5 –
N: Ratio of bit rate to clock (N = 16)
D: Clock duty (D = 0 to 1.0)
L: Frame length (L = 9 to 12)
F: Absolute value of clock rate deviation
M = {0.5 – 1/(2 × 16)} × 100 [%] = 46.875%
Receive Data Sampling Timing and Reception Margin in Asynchronous Mode
Internal basic
clock
Receive data
(RxD)
Synchronization
sampling timing
Data sampling
timing
Figure 13.6 Receive Data Sampling Timing in Asynchronous Mode
2N
1
) – (L – 0.5) F –
0
8 clocks
Start bit
16 clocks
7
|
D – 0.5
N
|
15 0
(1 + F) | × 100 [%]
D0
7
... Formula (1)
15 0
D1

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