По поводу отношения к BIOS у данного устройства/его

2 Окт 2007 - 14:49
Сказочник >> 27403 >> 1742.14

По поводу отношения к BIOS'у данного устройства/его прошивки - на мой взгляд тема больше заслуживет помещения в Экзотику или Остальные проблемы, связанные с BIOS. Т.е. идет обсуждение не собственно BIOS'а, а устройства, обеспечивающего нормальную работу другого устройства, которое и имеет BIOS.
Root, в предыдущем посте в вопросе по BIOS'у забыл поставить смайлик;), сорри;).
По поводу JTAG'а - из того, что я успел почитать (к сожалению, не так уж и много), наличие оного никак не наблюдается.
По поводу программирования/стирания/чтения позволю еще намного поцитировать избранное из прочитанного;):

Цитата:
This LSI has an on-chip ROM (flash memory or masked ROM).
ROM features:
· Two flash memory on-board programming modes
- Boot mode
- User program mode
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.
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When the mode pins are set in the reset state and a reset-start is executed, this LSI enters an operating mode as shown in figure 23.2. In user mode, flash memory can be read but not programmed or erased. The boot, user program, and programmer modes are provided as modes to write and erase the flash memory.
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The flash memory is controlled by means of the pins shown in table 23.2.
Pin Name I/O    Function
/RES     Input  Reset
MD1      Input  Sets this LSI’s operating mode
MD0      Input  Sets this LSI’s operating mode
P92      Input  Sets this LSI’s operating mode
P91      Input  Sets this LSI’s operating mode
P90      Input  Sets this LSI’s operating mode
TxD1     Output Serial transmit data output
RxD1     Input  Serial receive data input

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A software method, using the CPU, is employed to program and erase flash memory in the onboard programming modes. Depending on the FLMCR1 and FLMCR2 settings, the flash memory operates in one of the following four modes: program mode, program-verify mode, erase mode, and erase-verify mode. The programming control program in boot mode and the user program/erase control program in user program mode use these operating modes in combination to perform programming/erasing.
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In programmer mode, the on-chip flash memory can be programmed/erased by a PROM
programmer via a socket adapter, just like for a discrete flash memory. Use a PROM programmer
that supports the Hitachi 64/128/256-kbyte flash memory on-chip MCU device.

Почитав описание выводов, обнаружил, что в "programmer mode" прослеживается интересная картина: /RES, XTAL, EXTAL, /WE, /CE, /OE, FA0-FA17, FO0-FO7.

Hitachi H8S/2140B