參數(shù)資料
型號(hào)： P800-UK
英文描述： P800 PROGRAMMER (UK)
中文描述： P800的程序員（英國(guó)）
文件頁(yè)數(shù)： 11/36頁(yè)
文件大?。?/td> 230K
代理商： P800-UK
P800 Operating Manual
10
!
MODE then select required mode.
Note that if the device is 16 bits wide then two bytes of RAM are required to store each
device word. This can be done either high byte first/low byte last (the default), or else low
byte first/high byte last. Having selected the bit mode as detailed below you will then be
asked to specify the byte order. To do this use the
←
and
→
keys to make the selection,
then press ENTER when ready.
The mode may be changed on power up, or when a new device is selected, for example if
the mode requires more RAM than the P800 has. Not all modes are available for all parts.
2.3.1 8-bit Gang
In 8 bit GANG mode all sockets map to the same RAM image. Device data is stored in one
contiguous region of RAM. Loading is done from socket 1.
2.3.2 8-bit 2of2 (2 sets of 2 parts)
In 2of2 set mode data in the RAM is stored in two blocks, one block for sockets 1 and 3,
followed by one block for sockets 2 and 4. The block size is the size of the device selected.
- Sockets 1 and 3 will program/verify with data starting at RAM START.
- Sockets 2 and4 will program/verify with data starting at (RAM START + device size).
Loading will over write any existing data in the RAM for all sockets. Devices are required in
sockets 1 and 2.
2.3.3 8-bit 1of4 (1 set of 4 parts)
In 1of4 set mode data in the RAM is stored in four blocks, one block for each socket. The
block size is the size of the device selected.
- Socket 1 will program/verify with data starting at RAM START.
- Socket 2 will program/verify with data starting at (RAM START + device size).
- Socket 3 will program/verify with data starting at (RAM START + (device size x 2)).
- Socket 4 will program/verify with data starting at (RAM START + (device size x 3)).
Loading will over write any existing data in the RAM for all sockets. 3 or 4 devices may be
present, as long as there are devices in sockets 1, 2 and 3.
2.3.4 16-bit Gang
In 16-bit GANG mode groups of 16 bit data may be programmed.
For an 8-bit wide device the mapping will be as follows:
Socket
1
2
3
Image
A
B
A
The data for image A will be stored at even locations in RAM, while the data for image B will
be stored at odd locations in RAM. Loading is done sockets 1 and 2 only.
4
B
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