Rainbow Electronics AT91CAP9S250A - Manual (Page 160)

160
6264A–CAP–21-May-07
AT91CAP9S500A/AT91CAP9S250A
21.6.4 16-bit BCRAM
21.6.4.1 Hardware Configuration
21.6.4.2 Software Configuration
The following configuration has to be performed:
• Assign the EBI CS1 to the BCRAM by setting the bit EBI_CS1A in the EBI Chip Select
Assignment Register located in the bus matrix memory space
• The Data Bus Width is to be programmed to 16 bits.
• The BCRAM initialization sequence is described in the “Cellular Ram initialisation” part of
the BCRAM controller.
D4
D2
D10
D5
D12
D9
D14
D15
D3
D0
D6
D7
D8
D1
D13
D11
A17
A18
A19
A20
A21
A22
A11
A12
A13
A14
A15
A16
A2
A3
A4
A5
A6
A7
A8
A9
A10
A23
A24
A0
D[0..15]
A[2..24]
BCCS
BCWE
BCOE
BCCK
BCADV
BCCRE
BCOWAIT
NBS1
VDDIOM
(NBS0)
U1 U1
A0
A3
A1
A4
A2
A5
A3
B3
A4
B4
A5
C3
A6
C4
A7
D4
A8
H2
A9
H3
A10
H4
A11
H5
A12
G3
A13
G4
A14
F3
A15
F4
A16
E4
A17
D3
A18
H1
A19
G2
A20
H6
DQ0
B6
DQ1
C5
DQ2
C6
DQ3
D5
DQ4
E5
DQ5
F5
DQ6
F6
DQ7
G6
DQ8
B1
DQ9
C1
DQ10
C2
DQ11
D2
DQ12
E2
DQ13
F2
DQ14
F1
DQ15
G1
VCC
D6
VSS
E6
VSSQ
D1
VCCQ
E1
WE
G5
CE
B5
CRE
A6
OE
A2
LB
A1
UB
B2
A21
E3
A22
J4
CLK
J2
ADV
J3
WAIT
J1
RFU
J5
RFU
J6
C1 100NF C1 100NF
C2 100NF C2 100NF