TMP92CF30
2009-06-15
92CF30-171
(2)
Setting up the NAND flash area
Figure 3.8.8 shows a memory map for the NAND flash memory.
Since it is recommended that the CS3 space be located in the memory area from
000000H to 3FFFFFH, the following description is provided for such condition.In this case,
the NAND flash area overlaps with the CS3 space. However, the
3
CS
pin is not asserted
by setting the BROMCR<CSDIS> bit to 1. Likewise, the
0
CS
through
3
CS
pins, the
CSXA
through
CSXB
pins and the
CSZA
through
CSZD
pins are not asserted either.
Note 1: In the above setting, 296 Kbytes out of the memory area for the CS3 (000000H to 049FFFH) cannot be used.
Note 2: The 16-byte area (001FF0H to 001FFFH) is predefined asNAND Flash area as shown below regardless of
which CS space is selected. Therefore, the setting of the CS3 space does not affect the NAND flash area.
(NAND-Flash area specification)
1. Bus width : Specified by NDFMCR1<BUSW> in the NAND Flash controller.
2. Wait control : Specified by NDFMCR<SPLW1:SPLW0> and NDFMCR<SPHW1:SPHW0> in
the NAND Flash controller
7 6 5 4 3 2 1 0
Bit
Symbol
CSDIS
−
−
BROMCR
(016CH)
Read/Write
R/W
Reset
State
1 1 0
Function
Nand_Flash
area
CS output
0: Enable
1: Disable
Always write
“1”
Always write
“0”
Figure 3.8.8 Recommended CS3 Space Assignment
NAND flash
(16 bytes)
COMMON X
(2 Mbytes)
LOCAL X
(2 Mbytes)
Internal I/O
Internal RAM
(128Kbytes)
All CS pins become to unactibe
by BROMCR<CSDIS>
=
”1”
000000H
001FF0H
002000H
400000H
04A000H
200000H
CS3 area setting
000000H to 3FFFFFH (4 Mbytes)
021FFFH
046000H
Internal RAM
(16 Kbytes)
Содержание TLCS-900/H1 Series
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