DF2148ATE20 Renesas Electronics America, DF2148ATE20 Datasheet - Page 691

• Manufacturer Part Number: DF2148ATE20
• Description: IC H8S MCU FLASH 128K 100-QFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2100r

Specifications of DF2148ATE20

• 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: -20°C ~ 75°C
• Package / Case: 100-TQFP, 100-VQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Other names: HD64F2148ATE20; HD64F2148ATE20

On-Board Programming Modes
Boot mode
1. Initial state
3. Flash memory initialization
The chip
The chip
The flash memory is in the erased state when the
device is shipped. The description here applies to
the case where the old program version or data
is being rewritten. The user should prepare the
programming control program and new
application program beforehand in the host.
The erase program in the boot program area (in
RAM) is executed, and the flash memory is
initialized (to H'FF). In boot mode, entire flash
memory erasure is performed, without regard to
blocks.
Section 22 ROM
Application program
Flash memory
Flash memory
Flash memory
Boot program
Boot program
(old version)
erase
Programming control
Programming control
New application
New application
program
program
program
program
Host
Host
Boot program area
(Mask ROM Version, H8S/2148 F-ZTAT, H8S/2147N F-ZTAT, H8S/2144 F-ZTAT, and H8S/2142 F-ZTAT)
RAM
RAM
Figure 22.4 Boot Mode
SCI
SCI
2. SCI communication check
4. Writing new application program
The chip
The chip
When boot mode is entered, the boot program in
the chip (originally incorporated in the chip) is
started, an SCI communication check is carried
out, and the boot program required for flash
memory erasing is automatically transferred to
the RAM boot program area.
The programming control program transferred
from the host to RAM by SCI communication is
executed, and the new application program in the
host is written into the flash memory.
Application program
Rev. 4.00 Sep 27, 2006 page 645 of 1130
New application
Flash memory
Flash memory
Boot program
Boot program
(old version)
program
Programming control
New application
program
program
Host
Host
Boot program area
control program
Programming
Program execution state
RAM
RAM
REJ09B0327-0400
SCI
SCI