User manual
...the world's most energy friendly microcontrollers
2012-04-24 - Giant Gecko Family - d0053_Rev0.96 222
www.energymicro.com
Bit Name Reset Access Description
Enables or disables half cycle duration of the WEn strobe in the last WRSTRB cycle.
27:18 Reserved
To ensure compatibility with future devices, always write bits to 0. More information in Section 2.1 (p. 3)
17:16 WRHOLD 0x3 RW Write Hold Time
Sets the number of cycles CSn is held active after the WEn is deasserted.
15:14 Reserved
To ensure compatibility with future devices, always write bits to 0. More information in Section 2.1 (p. 3)
13:8 WRSTRB 0x3F RW Write Strobe Time
Sets the number of cycles the WEn is held active. If set to 0, 1 cycle is inserted by HW.
7:2 Reserved
To ensure compatibility with future devices, always write bits to 0. More information in Section 2.1 (p. 3)
1:0 WRSETUP 0x3 RW Write Setup Time
Sets the number of cycles the address setup before WEn is asserted.
14.5.14 EBI_POLARITY2 - Polarity Register 2
Offset Bit Position
0x034
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Reset
0
0
0
0
0
0
Access
RW
RW
RW
RW
RW
RW
Name
BLPOL
ARDYPOL
ALEPOL
WEPOL
REPOL
CSPOL
Bit Name Reset Access Description
31:6 Reserved
To ensure compatibility with future devices, always write bits to 0. More information in Section 2.1 (p. 3)
5 BLPOL 0 RW BL Polarity
Sets the polarity of the EBI_BLn lines.
Value Mode Description
0 ACTIVELOW BLn[1:0] are active low.
1 ACTIVEHIGH BLn[1:0] are active high.
4 ARDYPOL 0 RW ARDY Polarity
Sets the polarity of the EBI_ARDY line.
Value Mode Description
0 ACTIVELOW ARDY is active low.
1 ACTIVEHIGH ARDY is active high.
3 ALEPOL 0 RW Address Latch Polarity
Sets the polarity of the EBI_ALE line.
Value Mode Description
0 ACTIVELOW ALE is active low.
1 ACTIVEHIGH ALE is active high.
2 WEPOL 0 RW Write Enable Polarity
Sets the polarity of the EBI_WEn and EBI_NANDWEn lines.
Value Mode Description
0 ACTIVELOW WEn and NANDWEn are active low.
1 ACTIVEHIGH WEn and NANDWEn are active high.
1 REPOL 0 RW Read Enable Polarity
Sets the polarity of the EBI_REn and EBI_NANDREn lines.