HD64F2638F20J Renesas Electronics America, HD64F2638F20J Datasheet - Page 556

• Manufacturer Part Number: HD64F2638F20J
• Description: IC H8S MCU FLASH 256K 128-QFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2600r

Specifications of HD64F2638F20J

• Core Processor: H8S/2600
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: CAN, SCI, SmartCard
• Peripherals: Motor Control PWM, POR, PWM, WDT
• Number Of I /o: 72
• Program Memory Size: 256KB (256K x 8)
• Program Memory Type: FLASH
• Ram Size: 16K x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Data Converters: A/D 12x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 128-QFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -

Section 13 Serial Communication Interface (SCI)
Thus the reception margin in asynchronous mode is given by formula (1) below.
M = | (0.5 –
Where
Assuming values of F = 0 and D = 0.5 in formula (1), a reception margin of 46.875% is given by
formula (2) below.
When D = 0.5 and F = 0,
M = (0.5 –
However, this is only the computed value, and a margin of 20% to 30% should be allowed in
system design.
Page 506 of 1458
Internal basic
clock
Receive data
(RxD)
Synchronization
sampling timing
Data sampling
timing
= 46.875%
M : Reception margin (%)
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
Figure 13-21 Receive Data Sampling Timing in Asynchronous Mode
2 × 16
2N
1
1
0
) × 100%
) – (L – 0.5) F –
8 clocks
Start bit
16 clocks
7
| D – 0.5 |
N
(1 + F) | × 100%
15 0
D0
7
H8S/2639, H8S/2638, H8S/2636,
REJ09B0103-0800 Rev. 8.00
H8S/2630, H8S/2635 Group
... Formula (2)
... Formula (1)
May 28, 2010
15 0
D1