R5F61662N50FPV Renesas Electronics America, R5F61662N50FPV Datasheet - Page 852

• Manufacturer Part Number: R5F61662N50FPV
• Description: MCU 24KB FLASH 384K 144-LQFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8SX/1600r

Specifications of R5F61662N50FPV

• Core Processor: H8SX
• Core Size: 16/32-Bit
• Speed: 50MHz
• Connectivity: EBI/EMI, I²C, IrDA, SCI, SmartCard, USB
• Peripherals: DMA, LVD, POR, PWM, WDT
• Number Of I /o: 92
• Program Memory Size: 384KB (384K x 8)
• Program Memory Type: FLASH
• Ram Size: 40K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 V
• Data Converters: A/D 8x10b; D/A 2x8b
• Oscillator Type: External
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 144-LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

Section 22 Flash Memory
In user boot mode, though the user boot MAT can be seen in the flash memory space, the user
MAT is hidden in the background. Therefore, the user MAT and user boot MAT are switched
while the user MAT is being programmed. Because the user boot MAT is hidden while the user
MAT is being programmed, the procedure program must be executed in an area other than flash
memory. After programming completes, switch the memory MATs again to return to the first
state.
Memory MAT switching is enabled by setting FMATS. However note that access to a memory
MAT is not allowed until memory MAT switching is completed. During memory MAT switching,
the LSI is in an unstable state, e.g. if an interrupt occurs, from which memory MAT the interrupt
vector is read is undetermined. Perform memory MAT switching in accordance with the
description in section 22.11, Switching between User MAT and User Boot MAT.
Except for memory MAT switching, the programming procedure is the same as that in user
program mode.
The area that can be executed in the steps of the procedure program (on-chip RAM, user MAT,
and external space) is shown in section 22.8.4, On-Chip Program and Storable Area for Program
Data.
(3)
User MAT Erasing in User Boot Mode
Figure 22.15 shows the procedure for erasing the user MAT in user boot mode.
The difference between the erasing procedures in user program mode and user boot mode is the
memory MAT switching as shown in figure 22.15. For erasing the user MAT in user boot mode,
additional processing made by setting FMATS is required: switching from the user boot MAT to
the user MAT, and switching back to the user boot MAT after erasing completes.
Rev. 2.00 Sep. 16, 2009 Page 822 of 1036
REJ09B0414-0200