DF3048BVX25WV Renesas Electronics America, DF3048BVX25WV Datasheet - Page 539
![MCU 3/5V 128K PB-FREE 100-TQFP](/photos/28/61/286123/100-tqfp__100-vqfp_sml.jpg)
DF3048BVX25WV
Manufacturer Part Number
DF3048BVX25WV
Description
MCU 3/5V 128K PB-FREE 100-TQFP
Manufacturer
Renesas Electronics America
Series
H8® H8/300Hr
Specifications of DF3048BVX25WV
Core Processor
H8/300H
Core Size
16-Bit
Speed
25MHz
Connectivity
SCI, SmartCard
Peripherals
DMA, PWM, WDT
Number Of I /o
70
Program Memory Size
128KB (128K x 8)
Program Memory Type
FLASH
Ram Size
4K x 8
Voltage - Supply (vcc/vdd)
3 V ~ 3.6 V
Data Converters
A/D 8x10b; D/A 2x8b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
100-TQFP, 100-VQFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
DF3048BVX25WV
Manufacturer:
Renesas Electronics America
Quantity:
10 000
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The receive margin in asynchronous mode can therefore be expressed as in equation (1).
From equation (1), if F = 0 and D = 0.5 the receive margin is 46.875%, as given by equation (2).
This is a theoretical value. A reasonable margin to allow in system designs is 20% to 30%.
Restrictions on Usage of DMAC
To have the DMAC read RDR, be sure to select the SCI receive-data-full interrupt (RXI) as the
activation source with bits DTS2 to DTS0 in DTCR.
Internal
base clock
Receive data
(RxD)
Synchronization
sampling timing
Data sampling
timing
M = (0.5
M: Receive margin (%)
N: Ratio of clock frequency to bit rate (N = 16)
D: Clock duty cycle (D = 0 to 1.0)
L:
F:
D = 0.5, F = 0
M = {0.5 – 1/(2
= 46.875% ............................................................................................. (2)
Figure 13.21 Receive Data Sampling Timing in Asynchronous Mode
Frame length (L = 9 to 12)
Absolute deviation of clock frequency
2N
1
0
)
16)}
8 clocks
Start bit
(L
0.5) F
100%
16 clocks
7
D
N
0.5
(1 + F)
15 0
Section 13 Serial Communication Interface
Rev. 3.00 Sep 27, 2006 page 511 of 872
100% ................... (1)
D
0
7
REJ09B0325-0300
15 0
D
1
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