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2
2.3.5 External Serial Flash Memory Interface
The M3A-HS64 comes standard with a serial flash memory listed in the table below. The serial flash memory is controlled by the
RSPI built in the SH7264.
The SH7264 RSPI channel 0 pin is also used as the FLCTL pin. When connecting it with serial flash memory, set SW5-5 to ON,
and SW5-6 to OFF.
Serial flash memory is write-protected or write-enabled by the system setting DIP switches.
The figure below shows the serial flash memory block diagram. Table 2.3.10 lists the DIP switch setting (SW5, and SW6).
Part Number
AT26DF161A-SU
SH7264
PF9/A23/RSPCK0/FRB
PF10/A24/SSL00/FCE#
PF11/MOSI0/TIOC3C/SPDIF_IN
PF12/MISO0/TIOC3D/SPDIF_OUT
Note: Pin names
in red
indicate the function used.
Number
Connected to the NAND flash memory
SW5-5
Connected to the serial flash memory
SW5-6
SW6-3
Serial flash memory is write-enabled (default)
Rev. 1.00 Apr 30, 2009
REJ11J0034-0100
Table 2.3.9 Serial Flash Memory Specifications
Interface
4-wire serial (RSPI)
2
NOR flash memory
NAND or
RSPI
S1A
D1
S1B
S2A
D2
S2B
S3A
D3
PF11
S3B
S4A
D4
PF12
S4B
MUX
EN#
IN
3.3 V
DIP
SW5-5
Figure 2.3.6 Serial Flash Memory Interface Block Diagram
Table 2.3.10 DIP Switches Setting (SW5, and SW6)
OFF (High)
2.3.5 External Serial Flash Memory Interface
Capacity
2 MB
Expansion connector
2
4
NAND flash memory
Serial flash memory
or
expansion connector
S1A
D1
S1B
3.3 V
S2A
D2
S2B
S3A
PF11
D3
S3B
S4A
PF12
D4
S4B
MUX
EN#
IN
3.3 V
3.3 V
DIP
DIP
SW6-3
SW5-6
Function
Connected to the device which is connected to RSPI (default)
Connected to the expansion connector
(CD deck/RSPDIF/MTU2 - default)
Serial flash memory is write-protected
M3A-HS64 Functions
Package
8-pin, SOP
RSPDIF/CD deck interface (M3A-HS64G01)
MTU2 interface (M3A-HS64G02)
AT26DF161A
3.3 V
2 MB
3.3 V
SCK (Serial Clock)
CS# (Chip Select)
SI (Serial Data Input)
SO (Serial Data Output)
HOLD#
3.3 V
WP# (Write Protect)
ON (Low)
2-19
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