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4.3.2 Memory bank register (0004h)
Register name
Address
BANK
0004h
15
14
13
Field
Bit
BANK
bit [6:0]
Remark
The value of this register is meaningless when the 32-bit multiplexed synchronous bus interface is
used.
4.3.3 Memory mode register (0006h)
Register name
Address
MODE
0006h
15
14
13
HS
BL
Caution Set this MODE register before issuing a command to the CMD register after reset. Do not write
anything to this register until it is reset after a command has been issued to the CMD register. If
the value of this register is rewritten while the operation is being carried out, the switching
operation cannot be guaranteed.
Remark
The value indicated by ! under the heading Default Value is reset to 0 when a low level is input to the
HSEL pin and is set to 1 when a high level is input to the HSEL pin.
Field
Bit
HS
bit [15]
134
CHAPTER 4 INTERNAL REGISTERS
Default
xxxx_xxxx_x000_0000
12
11
10
9
8
R/W
R/W
These bits specify a bank used to access the external memory
when the 16-bit separated asynchronous bus interface is used. For
details, refer to 3.11 Microprocessor Interface.
"00h" to "7Fh": BANK number for accessing external memory
Default
!0xx_xx00_0x00_0x00
12
11
10
9
8
HM
HC
R/W
R
Indicates the level of the HSEL pin, i.e., the mode of interfacing with
the microprocessor. A value written to this bit is meaningless.
0: 32-bit multiplexed synchronous bus interface
1: 16-bit separated asynchronous bus interface
R/W
R/W
7
6
5
4
3
BANK
Function
R/W
R/W or R
7
6
5
4
3
EO
HMS
EO
Function
2
1
0
Default Value
00h
2
1
0
CMS
Default Value
Fixed to 0 or 1
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