D12321VF25V Renesas Electronics America, D12321VF25V Datasheet - Page 692

• Manufacturer Part Number: D12321VF25V
• Description: IC H8S/2300 MCU ROMLESS 128QFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2300r

Specifications of D12321VF25V

• Core Processor: H8S/2000
• Core Size: 16-Bit
• Speed: 25MHz
• Connectivity: SCI, SmartCard
• Peripherals: POR, PWM, WDT
• Number Of I /o: 86
• Program Memory Type: ROMless
• Ram Size: 4K 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: 128-QFP
• For Use With: EDK2329 - DEV EVALUATION KIT H8S/2329
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -

Section 14 Serial Communication Interface (SCI)
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.
Rev.6.00 Sep. 27, 2007 Page 660 of 1268
REJ09B0220-0600
Internal base
clock
Receive data
(RxD)
Synchronization
sampling timing
Data sampling
timing
M = | (0.5 –
M = (0.5 –
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
= 46.875%
Figure 14.21 Receive Data Sampling Timing in Asynchronous Mode
0
2 × 16
2N
8 clocks
Start bit
1
1
) – (L – 0.5) F –
) × 100%
16 clocks
7
| D – 0.5 |
N
15 0
(1 + F) | × 100%
D0
7
... Formula (1)
... Formula (2)
15 0
D1