DF2357F20 Renesas Electronics America, DF2357F20 Datasheet - Page 663

• Manufacturer Part Number: DF2357F20
• Description: IC H8S MCU FLASH 5V 128K 128QFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2300r

Specifications of DF2357F20

• Core Processor: H8S/2000
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: SCI, SmartCard
• Peripherals: DMA, POR, PWM, WDT
• Number Of I /o: 87
• Program Memory Size: 128KB (128K x 8)
• Program Memory Type: FLASH
• Ram Size: 8K x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Data Converters: A/D 8x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 128-QFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -

19.17.1 Boot Mode
When boot mode is used, the flash memory programming control program must be prepared in the host beforehand. The
channel 1 SCI to be used is set to asynchronous mode.
When a reset-start is executed after the H8S/2398 F-ZTAT chip’s pins have been set to boot mode, the boot program built
into the chip is started and the programming control program prepared in the host is serially transmitted to the chip via the
SCI. In the chip, the programming control program received via the SCI is written into the programming control program
area in on-chip RAM. After the transfer is completed, control branches to the start address of the programming control
program area and the programming control program execution state is entered (flash memory programming is performed).
The transferred programming control program must therefore include coding that follows the programming algorithm
given later.
The system configuration in boot mode is shown in figure 19-43, and the boot program mode execution procedure in
figure 19-44.
Host
Figure 19-43 System Configuration in Boot Mode
Verify data transmission
Write data reception
Chip
RxD1
TxD1
SCI1
Rev.6.00 Oct.28.2004 page 633 of 1016
Flash memory
On-chip RAM
REJ09B0138-0600H