Denon Professional DN-V755, Руководство по обслуживанию

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17
DN-V750/V755
93,94,95,
96,97,98
SA4~9 I address bus 4~9 for ISA mode
92 CMD I Command type:
When high, the access of this command cycle is DATA port.
When low, the access of this command cycle is ADDRESS port.
91 IO16 O word command indication
When the access of internal memory is word or dword width, this pin will
be asserted.
This pin is low active at default, its polarity can be modified by EEPROM
setting. See the EEPROM content description for detail.
100 INT O interrupt request
This pin is high active at default, its polarity can be modified by EEPROM
setting or strap pin MDC. See the EEPROM content description for detail.
56,53,52,
51,50,49,
47,46,45,
44,43,41,
40,39,38
37
SD16~31 (in
double word
mode) I/O Processor data bus bit 16~31
These pins are used as data bus bits 16~31 when the DM9000 is set to
double word mode (the straps pin EEDO is pull-high and WAKEUP is not
pull-high).
57 IO32 (in double
word mode) O Double word command indication
This pins is used as the Double word command indication when the
DM9000 is set to double data word mode and when the access of internal
memory is double word width, this pin will be asserted.
This pin is low active at default, its polarity can be modified by EEPROM
setting. See the EEPROM content description for detail.
EEPROM Interface
64 EEDI I Data from EEPROM
65 EEDO I/O Data to EEPROM
This pin is also as a strap pin. Combine with strap pin WOL, it can set the
data width of the internal memory access.
The decoder table is the following, where the logic 1 means the strap pin
is pull-high.
WAKEUP EEDO data width
0 0 word
0 1 double word
1 0 byte
1 1 reserved
66 EECK O Clock to EEPROM
67 EECS I/O Chip Select to EEPROM
This pin is also used as a strap pin to define the LED modes.
When it is pull-high, the LED mode is the mode 1;
Otherwise it is mode 0.
Clock Interface
21 X2_25M O Crystal 25MHz Out
22 X1_25M I Crystal 25MHz In