HD64F3642AH Renesas Electronics America, HD64F3642AH Datasheet - Page 361
HD64F3642AH
Manufacturer Part Number
HD64F3642AH
Description
IC H8 MCU FLASH 16K 64QFP
Manufacturer
Renesas Electronics America
Series
H8® H8/300Lr
Datasheet
1.HD64F3644HV.pdf
(551 pages)
Specifications of HD64F3642AH
Core Processor
H8/300L
Core Size
8-Bit
Speed
8MHz
Connectivity
SCI
Peripherals
PWM, WDT
Number Of I /o
53
Program Memory Size
16KB (16K x 8)
Program Memory Type
FLASH
Ram Size
1K x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 5.5 V
Data Converters
A/D 8x8b
Oscillator Type
Internal
Operating Temperature
-20°C ~ 75°C
Package / Case
64-QFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-
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Internal
basic clock
Receive data
(RXD)
Synchronization
sampling timing
Data sampling
timing
Consequently, the receive margin in asynchronous mode can be expressed as shown in
equation (1).
where
Substituting 0 for F (absolute value of clock frequency deviation) and 0.5 for D (clock duty) in
equation (1), a receive margin of 46.875% is given by equation (2).
When D = 0.5 and F = 0,
However, this is only a computed value, and a margin of 20% to 30% should be allowed when
carrying out system design.
M = (0.5 –
M: Receive margin (%)
N: Ratio of bit rate to clock (N = 16)
D: Clock duty (D = 0.5 to 1.0)
L: Frame length (L = 9 to 12)
F: Absolute value of clock frequency deviation
M = {0.5 – 1/(2
Figure 10.26 Receive Data Sampling Timing in Asynchronous Mode
0
2 N
8 clock pulses
Start bit
1
) –
16)}
D – 0.5
16 clock pulses
N
100 [%] = 46.875%
7
– (L – 0.5) F
100
15 0
Section 10 Serial Communication Interface
. . . . . . . . . . . . . . . . . . Equation (2)
Rev. 6.00 Sep 12, 2006 page 339 of 526
. . . . . . . . . . . . . . . Equation (1)
D0
7
REJ09B0326-0600
15 0
D1
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