HD64F2318VTE25 Renesas Electronics America, HD64F2318VTE25 Datasheet - Page 527

• Manufacturer Part Number: HD64F2318VTE25
• Description: IC H8S MCU FLASH 256K 100-QFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2300r

Specifications of HD64F2318VTE25

• Core Processor: H8S/2000
• Core Size: 16-Bit
• Speed: 25MHz
• Connectivity: SCI, SmartCard
• Peripherals: POR, PWM, WDT
• Number Of I /o: 71
• Program Memory Size: 256KB (256K x 8)
• Program Memory Type: FLASH
• Ram Size: 8K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 3.6 V
• Data Converters: A/D 8x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 100-TQFP, 100-VQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -

Thus the receive margin in asynchronous mode is given by formula (1) below.
Where M: Receive margin (%)
Assuming values of F = 0 and D = 0.5 in formula (1), a receive margin of 46.875% is given by
formula (2) below.
When D = 0.5 and F = 0,
However, this is a theoretical value, and a margin of 20% to 30% should be allowed in system
design.
Internal base
clock
Receive data
(RxD)
Synchronization
sampling timing
Data sampling
timing
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 –
M = (0.5 –
= 46.875%
Figure 12.21 Receive Data Sampling Timing in Asynchronous Mode
0
2 × 16
8 clocks
Start bit
2N
1
1
) – (L – 0.5) F –
) × 100%
16 clocks
7
| D – 0.5 |
Section 12 Serial Communication Interface (SCI)
15 0
N
Rev.7.00 Feb. 14, 2007 page 493 of 1108
(1 + F) | × 100%
D0
7
REJ09B0089-0700
... Formula (1)
... Formula (2)
15 0
D1