Renesas H8 Series Hardware Manual page 14

Item
6.5.1 Features
6.5.2 Block Diagram
Figure 6.7 Block
Diagram of Flash
Memory
6.5.3 Block
Configuration
Rev. 7.00 Mar 10, 2005 page xiv of xlii
Page Revision (See Manual for Details)
154 Description and note amended
The features of the 32-Kbyte or 16-Kbyte flash memory built
into the flash memory versions are summarized below.
• Programming/erase methods
— The flash memory is programmed 128 bytes at a time.
Erase is performed in single-block 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.
• Reprogramming capability
— The HD64F38024R, HD64F38124, and HD64F38122 can be
reprogrammed up to 1,000 times and the HD64F38024 up to
100 times.
Note: The system clock oscillator must be used when
programming or erasing the flash memory of the HD64F38124
and HD64F38122.
155 Figure amended
Flash memory
156 Description amended
Figure 6.8 shows the block configuration of the flash memory.
The thick lines indicate erasing units, the narrow lines indicate
programming units, and the values are addresses. In versions
with 32 Kbytes of flash memory, the flash memory is divided
into 1 Kbyte × 4 blocks and 28 Kbytes × 1 block. In versions
with 16 Kbytes of flash memory, the flash memory is divided
into 1 Kbyte × 4 blocks and 12 Kbytes × 1 block. Erasing is
performed in these units.
Programming is performed in 128-byte units starting from an
address with lower eight bits H'00 or H'80.