參數(shù)資料
型號(hào): UPD16661A
廠商: NEC Corp.
英文描述: 160-OUTPUT LCD COLUMN SEGMENT DRIVER WITH RAM
中文描述: 160輸出LCD列段驅(qū)動(dòng)與RAM
文件頁(yè)數(shù): 7/36頁(yè)
文件大小: 187K
代理商: UPD16661A
7
μ
PD16661A
3. DATA BUSES
The method for lining up byte data on the data bus line is essentially the Little Endian system adopted by NEC
and Intel Corp.
3.1 16-bit data bus (BMODE = L)
Byte unit access
D0 to D7
D8 to D15
00000H
00001H
00002H
00003H
00004H
00005H
:
:
:
:
Word unit access
D0 to D7
D8 to D15
00000H
00002H
00004H
:
:
For access from the system to be performed in word units (16 bits), or byte units (8 bits), /UBE (upper-byte
enable) and A0 are used to show whether valid data is in the bytes of either (or both) D0 to D7 or D8 to D15.
I/O
/CS
/OE
/WE
/UBE
A0
MODE
D0 to D7
D8 to D15
H
X
X
X
X
Not selected
Hi-z
Hi-z
L
L
H
L
L
H
L
H
L
Read
Dout
Hi-z
Dout
Dout
Dout
Hi-z
L
H
L
L
L
H
L
H
L
Write
Din
X
Din
Din
Din
X
L
L
H
X
H
X
X
H
X
H
Output
disable
Hi-z
Hi-z
Hi-z
Hi-z
Remark
X : Don’t care, Hi-z : High impedance
The address setting direction
is as shown on the right.
The address setting direction
is as shown on the right.
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