DF2505BR26DV Renesas Electronics America, DF2505BR26DV Datasheet - Page 735

• Manufacturer Part Number: DF2505BR26DV
• Description: IC H8S/2505 MCU FLASH 176-LFBGA
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2500r

Specifications of DF2505BR26DV

• Core Processor: H8S/2000
• Core Size: 16-Bit
• Speed: 26MHz
• Connectivity: I²C, SCI
• Peripherals: POR, PWM, WDT
• Number Of I /o: 104
• Program Memory Size: 384KB (384K x 8)
• Program Memory Type: FLASH
• Ram Size: 32K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 5.5 V
• Data Converters: A/D 16x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 176-LFBGA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

(2)
The on-chip programming/erasing program to be downloaded includes the initialization program.
The specified period pulse must be applied when programming or erasing. The specified pulse
width is made by the method in which wait loop is configured by the CPU instruction. The
operating frequency of the CPU must be set.
The initial program is set as a parameter of the programming/erasing program which has
downloaded these settings.
(a) Flash programming/erasing frequency parameter (FPEFEQ: General register ER0 of CPU)
This parameter sets the operating frequency of the CPU.
For the settable range of operating frequency in this LSI, see section 24.4.2, Clock Timing.
Bit
31 to 16 F31 to F16 ⎯
15 to 0 F15 to F0
Programming/Erasing Initialization
Bit Name
Initial
Value
⎯
R/W
R/W
R/W
Description
Reserved
These bit should be cleared to 0.
Frequency Set
Set the operating frequency of the CPU. The setting
value must be calculated as the following methods.
•
•
For example, when the operating frequency of the CPU is
25.000 MHz, the value is as follows.
•
•
The operating frequency which is shown in MHz units
must be rounded in a number to three decimal places
and be shown in a number of two decimal places.
The value multiplied by 100 is converted to the binary
digit and is written to the FPEFEQ parameter (general
register ER0).
The number to three decimal places of 25.000 is
rounded and the value is thus 25.00.
The formula that 25.00 × 100 = 2500 is converted to
the binary digit and B'0000,1001,1100,0100 (H'09C4)
is set to ER0.
Rev. 6.00 Sep. 24, 2009 Page 687 of 928
Section 20 Flash Memory
REJ09B0099-0600