431
PACR2:
Bit:
15
14
13
12
11
10
9
8
Bit name:
—
PA7MD
—
PA6MD
—
PA5MD
—
PA4MD
Initial value:
1
1
1
1
1
1
1
1
R/W:
—
R/W
—
R/W
—
R/W
—
R/W
Bit:
7
6
5
4
3
2
1
0
Bit name: PA3MD1 PA3MD0 PA2MD1 PA2MD0 PA1MD1 PA1MD0 PA0MD1 PA0MD0
Initial value:
1
0
0
1
0
1
0
1
R/W:
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
•
Bit 15 (Reserved): This bit is always read as 1. The write value should always be 1.
•
Bit 14 (PA7 Mode (PA7MD)): PA7MD selects the function of the PA7/
BACK
pin.
Bit 14: PA7MD
Function
0
Input/output (PA7)
1
Bus request acknowledge output (
BACK
)
(Initial value)
•
Bit 13 (Reserved): This bit is always read as 1. The write value should always be 1.
•
Bit 12 (PA6 Mode (PA6MD)): PA6MD selects the function of the PA6/
RD
pin.
Bit 12: PA6MD
Function
0
Input/output (PA6)
1
Read output (
RD
)
(Initial value)
•
Bit 11 (Reserved): This bit is always read as 1. The write value should always be 1.
•
Bit 10 (PA5 Mode (PA5MD)): PA5MD selects the function of the PA5/
WRH
(
LBS
) pin.
Bit 10: PA5MD
Function
0
Input/output (PA5)
1
Upper write output (
WRH
) or lower byte strobe output (
LBS
)
(Initial value)
•
Bit 9 (Reserved): This bit is alway read as 1. The write value should always be 1.
Содержание HD6417032
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Страница 525: ...490 CK RAS CAS TRp TRc TRcc tRASD1 tRASD2 tCASD3 tCASD2 TRr tCSR Figure 20 18 Self Refresh ...
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