DF2437FV Renesas Electronics America, DF2437FV Datasheet - Page 632

• 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: -

The difference between the erasing procedures in user program mode and user boot mode depends
on whether the MAT is switched or not as shown in figure 20.15.
MAT switching is enabled by writing a specific value to FMATS. However, note that while the
MATs are being switched, the LSI is in an unstable state, e.g. access to a MAT is not allowed until
MAT switching is completed, and if an interrupt occurs, from which MAT the interrupt vector is
read is undetermined. Perform MAT switching in accordance with the description in section 20.6,
Switching between User MAT and User Boot MAT.
Except for MAT switching, the erasing procedure is the same as that in user program mode.
Rev.2.00 May. 28, 2009 Page 592 of 732
REJ09B0059-0200
JSR FTDAR setting + 32
Select on-chip program
Figure 20.15 Procedure for Erasing User MAT in User Boot Mode
to be downloaded and
destination by FTDAR
and bus master operation
specify download
Set SCO to 1 and
execute download
Set FKEY to H'A5
procedure program
Clear FKEY to 0
Initialization
Set the FPEFEQ
Disable interrupts
other than CPU
Start erasing
DPFR = 0 ?
FPFR = 0 ?
parameter
1
Yes
Yes
Initialization error processing
Download error processing
No
No
User-boot-MAT
selection state
Note:
*
The MAT must be switched by FMATS to perform
No
the erasing error processing in the user boot MAT.
JSR FTDAR setting + 16
Set FMATS to H'AA to
than H'AA to select user MAT
Set FEBS parameter
select user boot MAT
Set FMATS to value other
Set FKEY to H'5A
procedure program
Clear FKEY to 0
block erasing is
Programming
End erasing
completed?
Required
FPFR = 0 ?
1
Yes
Yes
Clear FKEY and erasing
No
error processing*
switchover
switchover
MAT
MAT