HD64F2318VTE25 Renesas Electronics America, HD64F2318VTE25 Datasheet - Page 778

• Manufacturer Part Number: HD64F2318VTE25
• Description: IC H8S MCU FLASH 256K 100-QFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2300r

Specifications of HD64F2318VTE25

• Core Processor: H8S/2000
• Core Size: 16-Bit
• Speed: 25MHz
• Connectivity: SCI, SmartCard
• Peripherals: POR, PWM, WDT
• Number Of I /o: 71
• Program Memory Size: 256KB (256K x 8)
• Program Memory Type: FLASH
• Ram Size: 8K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 3.6 V
• Data Converters: A/D 8x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 100-TQFP, 100-VQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -

Section 17 ROM
17.27
It is possible to alternate between the user MAT and user boot MAT. However, the following
procedure is required because these MATs are allocated to address 0.
(Switching to the user boot MAT disables programming and erasing. Programming of the user
boot MAT should take place in boot mode or PROM mode.)
(1) MAT switching by the FMATS register should always be executed from the on-chip RAM.
(2) To ensure that the MAT that has been switched to is accessible, execute 4 NOP instructions in
(3) If an interrupt has occurred during switching, there is no guarantee of which memory MAT is
(4) After the MATs have been switched, take care because the interrupt vector table will also have
• Prepare the same interrupt processing routines and interrupt vectors in both the user MAT and
• Transfer the interrupt processing routines to on-chip RAM beforehand and set the interrupt
(5) Memory sizes of the user MAT and user boot MAT are different. When accessing the user
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the on-chip RAM immediately before or after writing to the FMATS register of the on-chip
RAM (this prevents access to the flash memory during MAT switching).
being accessed. Always mask the maskable interrupts before switching between MATs. In
addition, configure the system so that NMI interrupts do not occur during MAT switching.
been switched. Methods for processing the same interrupt before and after MAT switching
include the following:
user boot MAT.
vectors to the same on-chip RAM addresses for both the user MAT and user boot MAT.
boot MAT, do not access addresses above the top of its 8-kbyte memory space. If access goes
beyond the 8-kbyte space, the values read are undefined.
Switching between User MAT and User Boot MAT