User manual

...the world's most energy friendly microcontrollers
2012-04-24 - Giant Gecko Family - d0053_Rev0.96 215
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14.5.5 EBI_POLARITY - Polarity Register
Offset Bit Position
0x010
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.
Value Mode Description
0 ACTIVELOW REn and NANDREn are active low.
1 ACTIVEHIGH REn and NANDREn are active high.
0 CSPOL 0 RW Chip Select Polarity
Sets the polarity of the EBI_CSn line.
Value Mode Description
0 ACTIVELOW CSn is active low.
1 ACTIVEHIGH CSn is active high.