DM9010
Single Chip Ethernet Controller with General Processor Interface
Preliminary
12
Version: DM9010-DS-P03
Apr. 28, 2005
5.2 Processor Interface
1
IOR#
I,PD
Processor Read Command
This pin is low active at default; its polarity can be modified by EEPROM setting.
See the EEPROM content description for detail
2
IOW#
I,PD
Processor Write Command
This pin is low active at default; its polarity can be modified by EEPROM setting.
See the EEPROM content description for detail
3
AEN
I,PD
Address Enable
A low active signal used to select the DM9010.
4
IOWAIT
O,PD Processor Command Ready
When a command is issued before last command is completed, the IOWAIT will
be pulled low to indicate the current command is waited
The polarity and output type can be updated by EEPROM. The default is
Open-Drain output and low active.
14
RST
I,PD
Hardware Reset Command, active high to reset the DM9010
6,7,8,9,10,
11,12,13,
89,88,87,
86,85,84,
83,82
SD0~15
I/O,PD Processor Data Bus bit 0~15
93,94,95,
96,97,98
SA4~9
I,PD Address Bus 4~9
These pins are used to select the DM9010.
When SA9 and SA8 are in high states, and SA7 and AEN are in low
states, and SA6~4 are matched with strap pins TXD2~0, the DM9010 is
selected.
92
CMD
I,PD Command Type
When high, the access of this command cycle is DATA port
When low, the access of this command cycle is INDEX 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,PD 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,PD Processor Data Bus bit 16~31
These pins are used as data bus bits 16~31 when the DM9010 is set to
double word mode (the straps pin EEDO is pulled high and WAKE is not
pull-high)
57
IO32 (in double
word mode)
O,PD Double Word Command Indication
This pins is used as the double word command indication when the
DM9010 is set to double data word mode, and this pin will be asserted
when the access of internal memory is double word width
This pin is low active at default; its polarity can be modified by EEPROM
setting. See the EEPROM content description for detail
When the IO32 pin is pulled high, the INT pin is low active; otherwise the INT pin
is high active
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