HD64F3437TFI16V Renesas Electronics America, HD64F3437TFI16V Datasheet - Page 418

• Manufacturer Part Number: HD64F3437TFI16V
• Description: MCU FLASH 60K 100-TQFP
• Manufacturer: Renesas Electronics America

Specifications of HD64F3437TFI16V

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

19.3.1
To use boot mode, a user program for programming and erasing the flash memory must be
provided in advance on the host machine (which may be a personal computer). Serial
communication interface channel 1 is used in asynchronous mode. If the H8/3434F is placed in
boot mode, after it comes out of reset, a built-in boot program is activated. This program starts by
measuring the low period of data transmitted from the host and setting the bit rate register (BRR)
accordingly. The H8/3434F’s built-in serial communication interface (SCI) can then be used to
download the user program from the host machine. The user program is stored in on-chip RAM.
After the program has been stored, execution branches to address H'FBE0 in the on-chip RAM,
and the program stored on RAM is executed to program and erase the flash memory.
386
Boot Mode
HOST
Figure 19.3 Boot-Mode System Configuration
Receive data to be programmed
Transmit verification data
RxD
TxD
H8/3434F
SCI
1
1