hd64338023s Renesas Electronics Corporation., hd64338023s Datasheet - Page 196

• Manufacturer Part Number: hd64338023s
• Description: Renesas 8-bit Single-chip Microcomputer Super Low Power Series
• Manufacturer: Renesas Electronics Corporation.

Section 6 ROM
6.5
6.5.1
The features of the 32-Kbyte or 16-Kbyte flash memory built into the flash memory versions are
summarized below.
• Programming/erase methods
• Reprogramming capability
• On-board programming
• Programmer mode
• Automatic bit rate adjustment
• Programming/erasing protection
• Power-down mode
Note: The system clock oscillator must be used when programming or erasing the flash memory
Rev. 7.00 Mar 10, 2005 page 154 of 652
REJ09B0042-0700
 The flash memory is programmed 128 bytes at a time. Erase is performed in single-block
 The HD64F38024R, HD64F38124, and HD64F38122 can be reprogrammed up to 1,000
 On-board programming/erasing can be done in boot mode, in which the boot program built
 Flash memory can be programmed/erased in programmer mode using a PROM
 For data transfer in boot mode, this LSI's bit rate can be automatically adjusted to match
 Sets software protection against flash memory programming/erasing.
 The power supply circuit is partly halted in the subactive mode and can be read in the
units. On the HD64F38024, HD64F38024R, and HD64F38124 the flash memory is
configured as follows: 1 Kbyte × 4 blocks, 28 Kbytes × 1 block. On the HD64F38122 the
flash memory is configured as follows: 1 Kbyte × 4 blocks, 12 Kbytes × 1 block. To erase
the entire flash memory, each block must be erased in turn.
times and the HD64F38024 up to 100 times.
into the chip is started to erase or program of the entire flash memory. In normal user
program mode, individual blocks can be erased or programmed.
programmer, as well as in on-board programming mode.
the transfer bit rate of the host.
power-down mode.
of the HD64F38124 and HD64F38122.
Flash Memory Overview
Features