HD64F36912GFH Renesas Electronics America, HD64F36912GFH Datasheet - Page 267
![IC H8 MCU FLASH 8K 32-QFP](/photos/28/60/286098/32-lqfp_sml.jpg)
HD64F36912GFH
Manufacturer Part Number
HD64F36912GFH
Description
IC H8 MCU FLASH 8K 32-QFP
Manufacturer
Renesas Electronics America
Series
H8® H8/300H Tinyr
Datasheet
1.DF36912GFHV.pdf
(442 pages)
Specifications of HD64F36912GFH
Core Processor
H8/300H
Core Size
16-Bit
Speed
12MHz
Connectivity
I²C, SCI
Peripherals
LVD, POR, PWM, WDT
Number Of I /o
18
Program Memory Size
8KB (8K x 8)
Program Memory Type
FLASH
Ram Size
1.5K x 8
Voltage - Supply (vcc/vdd)
3 V ~ 5.5 V
Data Converters
A/D 4x10b
Oscillator Type
Internal
Operating Temperature
-20°C ~ 75°C
Package / Case
32-LQFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
HD64F36912GFH
Manufacturer:
Renesas Electronics America
Quantity:
10 000
- Current page: 267 of 442
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14.8.4
In asynchronous mode, SCI3 operates on a basic clock with a frequency of 16 times the transfer
rate. In reception, SCI3 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 14.20. Thus, the reception margin in asynchronous mode is given
by formula (1) below.
Legend N : Ratio of bit rate to clock (N = 16)
Assuming values of F (absolute value of clock rate deviation) = 0 and D (clock duty) = 0.5 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.
M = (0.5 –
D : Clock duty (D = 0.5 to 1.0)
L : Frame length (L = 9 to 12)
F : Absolute value of clock rate deviation
M = {0.5 – 1/(2
Receive Data Sampling Timing and Reception Margin in Asynchronous Mode
Internal basic
clock
Receive data
(RxD)
Synchronization
sampling timing
Data sampling
timing
Figure 14.20 Receive Data Sampling Timing in Asynchronous Mode
2N
1
) –
16)}
0
D – 0.5
8 clocks
Start bit
N
100 [%] = 46.875%
16 clocks
– (L – 0.5) F
7
Section 14 Serial Communication Interface 3 (SCI3)
100(%)
15 0
Rev. 3.00 Sep. 14, 2006 Page 237 of 408
D0
7
... Formula (1)
REJ09B0105-0300
15 0
D1
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