HD64F3664FPV Renesas Electronics America, HD64F3664FPV Datasheet - Page 247
![IC H8/3664 MCU FLASH 32K 64LQFP](/photos/12/19/121973/hd64f3664fpv_sml.jpg)
HD64F3664FPV
Manufacturer Part Number
HD64F3664FPV
Description
IC H8/3664 MCU FLASH 32K 64LQFP
Manufacturer
Renesas Electronics America
Series
H8® H8/300H Tinyr
Specifications of HD64F3664FPV
Core Size
16-Bit
Program Memory Size
32KB (32K x 8)
Oscillator Type
External
Core Processor
H8/300H
Speed
16MHz
Connectivity
I²C, SCI
Peripherals
PWM, WDT
Number Of I /o
29
Program Memory Type
FLASH
Ram Size
2K x 8
Voltage - Supply (vcc/vdd)
3 V ~ 5.5 V
Data Converters
A/D 8x10b
Operating Temperature
-20°C ~ 75°C
Package / Case
64-LQFP
No. Of I/o's
29
Ram Memory Size
2KB
Cpu Speed
16MHz
No. Of Timers
4
Digital Ic Case Style
LQFP
Supply Voltage
RoHS Compliant
Controller Family/series
H8/300H
Rohs Compliant
Yes
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
HD64F3664FPV
Manufacturer:
MURATA
Quantity:
34 000
Company:
Part Number:
HD64F3664FPV
Manufacturer:
HD
Quantity:
465
Company:
Part Number:
HD64F3664FPV
Manufacturer:
Renesas Electronics America
Quantity:
10 000
Part Number:
HD64F3664FPV
Manufacturer:
RENESAS/瑞萨
Quantity:
20 000
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14.8.4
In asynchronous mode, the SCI3 operates on a basic clock with a frequency of 16 times the
transfer rate. In reception, the 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 14.19.
Thus, the reception margin in asynchronous mode is given by formula (1) below.
M = (0.5 –
Where 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.
M = {0.5 – 1/(2 × 16)} × 100 [%] = 46.875%
However, this is only the computed value, and a margin of 20% to 30% should be allowed for in
system design.
D : Clock duty (D = 0.5 to 1.0)
L : Frame length (L = 9 to 12)
F : Absolute value of clock rate deviation
Receive Data Sampling Timing and Reception Margin in Asynchronous Mode
Internal basic
clock
Receive data
(RxD)
Synchronization
sampling timing
Data sampling
timing
2N
Figure 14.19 Receive Data Sampling Timing in Asynchronous Mode
1
) –
D – 0.5
N
0
– (L – 0.5) F × 100(%)
8 clocks
Start bit
16 clocks
7
15 0
D0
Rev. 5.00, 03/04, page 219 of 388
7
... Formula (1)
15 0
D1
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