h8s-2158 Renesas Electronics Corporation., h8s-2158 Datasheet - Page 769
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h8s-2158
Manufacturer Part Number
h8s-2158
Description
Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2100 Series
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.H8S-2158.pdf
(927 pages)
- Current page: 769 of 927
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This LSI has an on-chip flash memory. The features of the flash memory are summarized below.
A block diagram of the flash memory is shown in figure 24.1.
24.1
ROMF250A_000020020300
Size: 256 kbytes
Programming/erase methods
The flash memory is programmed 128 bytes at a time. Erase is performed in single-block units.
The flash memory is configured as follows: 64 kbytes × 3 blocks, 32 kbytes × 1 block, and 4
kbytes × 8 blocks. To erase the entire flash memory, each block must be erased in turn.
Programming/erase time
It takes 10 ms (typ.) to program the flash memory 128 bytes at a time; 80 µs (typ.) per 1 byte.
Erasing one block takes 100 ms (typ.).
Reprogramming capability
The flash memory can be reprogrammed up to 100 times.
Two flash memory on-board programming modes
On-board programming/erasing can be done in boot mode in which the boot program built into
the chip is started for erase or programming of the entire flash memory. In user program mode,
individual blocks can be erased or programmed.
Automatic bit rate adjustment
With data transfer in boot mode, this LSI's bit rate can be automatically adjusted to match the
transfer bit rate of the host.
Programming/erasing protection
Sets protection against flash memory programming/erasing via hardware, software, or error
protection.
Programmer mode
In addition to on-board programming mode, programmer mode is supported to program or
erase the flash memory using a PROM programmer.
Boot mode
User program mode
Features
Section 24 ROM
Rev. 3.00 Jan 25, 2006 page 717 of 872
REJ09B0286-0300
Section 24 ROM
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