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3.13 Memory Interface
VBAT
(NOT MOUNTED)
U300
BH28FB1WHFV
1
STBY
NC
2
GND
BGND
3
VIN
VOUT
C300
NA
DATA00
DATA01
DATA02
DATA03
DATA04
DATA05
DATA06
DATA07
DATA08
DATA09
DATA10
DATA11
DATA12
DATA13
2V8_VMEM
DATA14
DATA15
C315
0.1u
2V8_VMEM_S
2V8_VIO
In E-GOLDvoice, the 16bits demultiplex X-bus interface is used for memory device support. NOR
Flash memory is supported. (The NAND Flash memory is not supported). The page mode can be
supported for flash memories.
Up to 8MBytes of external RAM and/or ROM can be connected to the MCU via its external bus
interface.
Up to 3 external CS signals can be generated to save external glue logic.
Access to very slow memories is supported via a special 'Ready' function.
The system MCU clock is set to run with 26Mhz.
2V8_VMEM_S
5
6
4
MEMORY
C301
NA
U301
G2
DQ0
E3
DQ1
H3
DQ2
F4
DQ3
F5
DQ4
H6
DQ5
E6
DQ6
G7
DQ7
H2
DQ8
F3
DQ9
G3
DQ10
H4
DQ11
G6
DQ12
F6
DQ13
H7
DQ14
F7
DQ15
G4
VCCF
R310
0
G5
VCCS
R311
NA
G8
VSS1
E2
VSS2
C8
RFU0
R315
NA
D8
RFU1
E7
RFU2
F8
RFU3
C316
H5
RFU4
0.1u
Figure 3-13 Memory interface
3. TECHNICAL BRIEF
S71GL032A40BAW0F
E1
A0
D1
A1
C1
A2
B1
A3
D2
A4
C2
A5
B2
A6
A2
A7
A6
A8
C6
A9
D6
A10
A7
A11
B7
A12
C7
A13
D7
A14
B8
A15
E8
A16
D3
A17
C3
A18
B6
A19
C5
A20
TP300
F2
_OE
A5
_WE
A3
_LB
B3
_UB
F1
_CE1F
G1
_CE1S
B5
CE2S
C4
RY__BY
_RY_BY
A4
WP_ACC
B4
_RSTF
- 39 -
ADD01
ADD02
ADD03
ADD04
ADD05
ADD06
ADD07
ADD08
ADD09
ADD10
ADD11
ADD12
ADD13
ADD14
ADD15
ADD16
ADD17
ADD18
ADD19
2V8_VMEM
ADD20
2V8_VMEM
ADD21
_OE
_WR
ADD00
BHE_N
CS0n
CS1n
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