DF3052BX25V Renesas Electronics America, DF3052BX25V Datasheet - Page 607

MCU 5V 512K 100-TQFP

DF3052BX25V

Manufacturer Part Number
DF3052BX25V
Description
MCU 5V 512K 100-TQFP
Manufacturer
Renesas Electronics America
Series
H8® H8/300Hr
Datasheets

Specifications of DF3052BX25V

Core Processor
H8/300H
Core Size
16-Bit
Speed
25MHz
Connectivity
SCI, SmartCard
Peripherals
DMA, POR, PWM, WDT
Number Of I /o
70
Program Memory Size
512KB (512K x 8)
Program Memory Type
FLASH
Ram Size
8K x 8
Voltage - Supply (vcc/vdd)
4.5 V ~ 5.5 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
Lead free / RoHS Compliant
Eeprom Size
-

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
DF3052BX25V
Manufacturer:
Renesas Electronics America
Quantity:
10 000
Automatic SCI Bit Rate Adjustment
When boot mode is initiated, the LSI measures the low period of the asynchronous SCI
communication data (H'00) transmitted continuously from the host. The SCI transmit/receive
format should be set as follows: 8-bit data, 1 stop bit, no parity. The LSI calculates the bit rate of
the transmission from the host from the measured low period, and transmits one H'00 byte to the
host to indicate the end of bit rate adjustment. The host should confirm that this adjustment end
indication (H'00) has been received normally, and transmit one H'55 byte to the LSI. If reception
cannot be performed normally, initiate boot mode again (reset), and repeat the above operations.
Depending on the host’s transmission bit rate and the LSI’s system clock frequency, there will be
a discrepancy between the bit rates of the host and the LSI. Set the host transfer bit rate at 4,800,
9,600 or 19,200 bps to operate the SCI properly.
Table 18.6 shows host transfer bit rates and system clock frequencies for which automatic
adjustment of the LSI bit rate is possible. The boot program should be executed within this system
clock range.
Table 18.6 System Clock Frequencies for which Automatic Adjustment of LSI Bit Rate Is
Notes: 1. Use a host bit rate setting of 4800, 9600, or 19200 bps only. No other setting should be
Host Bit Rate
4800 bps
9,600 bps
19,200 bps
2. Although the H8/3052BF may also perform automatic bit rate adjustment with bit rate
used.
and system clock combinations other than those shown in table 18.6, a degree of error
will arise between the bit rates of the host and the H8/3052BF, and subsequent transfer
will not be performed normally. Therefore, only combinations of bit rate and system
clock within the ranges shown in table 18.6 can be used for boot mode execution.
Possible
Start
bit
System Clock Frequency for Which Automatic Adjustment
of LSI Bit Rate is Possible (MHz)
4 to 25
8 to 25
16 to 25
D0
Low period (9 bits) measured (H'00 data)
D1
D2
D3
D4
Rev. 3.00 Mar 21, 2006 page 577 of 814
D5
D6
D7
(1 or more bits)
REJ09B0302-0300
Section 18 ROM
High period
Stop
bit

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