DF2148RTE20IV Renesas Electronics America, DF2148RTE20IV Datasheet - Page 705

• Manufacturer Part Number: DF2148RTE20IV
• Description: MCU 5V 128K I-TEMP,PB-FREE, 100-
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2100r

Specifications of DF2148RTE20IV

• Core Processor: H8S/2000
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: Host Interface, I²C, IrDA, SCI
• Peripherals: POR, PWM, WDT
• Number Of I /o: 74
• Program Memory Size: 128KB (128K x 8)
• Program Memory Type: FLASH
• Ram Size: 4K x 8
• Voltage - Supply (vcc/vdd): 4 V ~ 5.5 V
• Data Converters: A/D 8x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 100-TQFP, 100-VQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

On-Chip RAM Area Divisions in Boot Mode
In boot mode, the 128-byte area from H'(FF)FF00 to H'(FF)FF7F is reserved for use by the boot
program, as shown in figure 22.10. The area to which the programming control program is
transferred is H'(FF)E080 to H'(FF)EFFF (3968 bytes) in the 128-kbyte versions, or H'(FF)E880 to
H'(FF)EFFF (1920 bytes) in the 64-kbyte versions. The boot program area can be used when the
programming control program transferred into RAM enters the execution state. A stack area
should be set up as required.
Notes on Use of User Mode
When the chip comes out of reset in boot mode, it measures the low period of the input at the
SCI’s RxD1 pin. The reset should end with RxD1 high. After the reset ends, it takes about 100
states for the chip to get ready to measure the low period of the RxD1 input.
In boot mode, if any data has been programmed into the flash memory (if all data is not 1), all
flash memory blocks are erased. Boot mode is for use when user program mode is unavailable,
such as the first time on-board programming is performed, or if the program activated in user
program mode is accidentally erased.
Note: * The boot program area cannot be used until a transition is made to the execution state
Section 22 ROM
H'(FF)E080
H'(FF)EFFF
H'(FF)FF00
H'(FF)FF7F
for the programming control program transferred to RAM. Note that the boot program
remains stored in this area after a branch is made to the programming control program.
(a) 128-kbyte versions
control program
Boot program
Programming
(3,968 bytes)
Figure 22.10 RAM Areas in Boot Mode
(128 bytes)
(Mask ROM Version, H8S/2148 F-ZTAT, H8S/2147N F-ZTAT, H8S/2144 F-ZTAT, and H8S/2142 F-ZTAT)
area *
area
H'(FF)EFFF
H'(FF)FF7F
H'(FF)FF00
H'(FF)E880
Rev. 4.00 Sep 27, 2006 page 659 of 1130
(b) 64-kbyte versions
control program
Programming
Boot program
(1,920 bytes)
(128 bytes)
area *
area
REJ09B0327-0400