DF2505FC26V Renesas Electronics America, DF2505FC26V Datasheet - Page 781

• Manufacturer Part Number: DF2505FC26V
• Description: IC H8S/2505 MCU FLASH 144QFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2500r

Specifications of DF2505FC26V

• 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: 144-QFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

20.8
1. Download time of on-chip program
2. Write to flash-memory related registers by DTC
3. Compatibility with programming/erasing program of conventional F-ZTAT H8S
4. Monitoring runaway by WDT
The programming program that includes the initialization routine and the erasing program that
includes the initialization routine are each 2 kbytes or less. Accordingly, when the CPU clock
frequency is 25 MHz, the download for each program takes approximately 130 μs at
maximum.
While an instruction in on-chip RAM is being executed, the DTC can write to the SCO bit in
FCCS that is used for a download request or FMATS that is used for MAT switching. Make
sure that these registers are not accidentally written to, otherwise an on-chip program may be
downloaded and damage RAM or a MAT switchover may occur and the CPU may get out of
control. Do not use DTC to program FLASH-related registers.
microcomputer
A programming/erasing program for flash memory used in the conventional F-ZTAT H8S
microcomputer which does not support download of the on-chip program by an SCO transfer
request cannot run in this LSI. Be sure to download the on-chip program to execute
programming/erasing of flash memory in this LSI.
Unlike the conventional F-ZTAT H8S microcomputer, no countermeasures are available for a
runaway by WDT during programming/erasing by the downloaded on-chip program. Prepare
countermeasures (e.g. use of the user branch routine or the periodic timer interrupts) for WDT
while taking the programming/erasing time into consideration as required.
Usage Notes
Rev. 6.00 Sep. 24, 2009 Page 733 of 928
Section 20 Flash Memory
REJ09B0099-0600