DF2437FV Renesas Electronics America, DF2437FV Datasheet - Page 643

• Manufacturer Part Number: DF2437FV
• Description: IC H8S/2437 MCU FLASH 128QFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2400r

Specifications of DF2437FV

• Core Processor: H8S/2600
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: I²C, SCI
• Peripherals: POR, PWM, WDT
• Number Of I /o: 85
• Program Memory Size: 256KB (256K x 8)
• Program Memory Type: FLASH
• Ram Size: 16K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 V
• Data Converters: A/D 16x10b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 128-QFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

20.5
There are three kinds of flash memory program/erase protection: hardware, software, and error
protection.
20.5.1
Programming and erasing of flash memory is forcibly disabled or suspended by hardware
protection. In this state, the downloading of an on-chip program and initialization are possible.
However, an activated program for programming or erasure cannot program or erase the user
MAT, and the error in programming/erasing is reported in the parameter FPFR.
Table 20.9 Hardware Protection
Item
FWE pin
protection
Reset/standby
protection
Protection
Hardware Protection
Description
•
•
•
When a low level signal is input to the FWE
pin, the FWE bit in FCCS is cleared and the
program/erase-protected state is entered.
The program/erase interface registers are
initialized by a reset (including a reset by the
WDT) and in hardware standby mode and
the program/erase-protected state is
entered.
The reset state will not be entered by a reset
using the RES pin unless the RES pin is held
low until oscillation has stabilized after power
is initially supplied. In the case of a reset
during operation, hold the RES pin low for
the RES pulse width that is specified in the
section on AC characteristics. If a reset is
input during programming or erasure, data
values in the flash memory are not
guaranteed. In this case, execute erasure
and then execute programming again.
Rev.2.00 May. 28, 2009 Page 603 of 732
Download
⎯
Function to be Protected
Program/Erase
REJ09B0059-0200