com90c66 Standard Microsystems Corp., com90c66 Datasheet - Page 74

• Manufacturer Part Number: com90c66
• Description: Arcnet Controller/transceiver With At Interface And On-chip Ram Corporation
• Manufacturer: Standard Microsystems Corp.

A0-A15,
nSBHE
BALE
nIOW
D0-D7 or
D0-D15
nTOPL
nIOCS16
* For latched address, t1 and t2 do not apply. Please refer to Figure 21 for Latched Address
** 200 nS minimum inactive time on consecutive writes to the Data Register of the COM90C66.
AEN
nTOPH
Mode.
t1
t2
t3
t4
t5
t6
t7
t8
Address, nSBHE Set Up to BALE Low *
Address, nSBHE Hold after BALE Low *
Address, nSBHE, AEN Set Up to nIOW Low
Valid Data Set Up to nIOW High
A2-A15, AEN Low to nIOCS16 Low
Data Hold Time from IOW High
nIOW High to BALE High (Next Address)
AEN Hold after nIOW High
Modified Version of Page 53 for Rev. D COM90C66 Only.
t5
Parameter
t1
t3
FIGURE 18 - WRITE I/O CYCLE
VALID
t2
74
min
30
10
20
20
25
30
0
9
VALID DATA
t4
typ
t6
t8
t7
max
25
**
units
nS
nS
nS
nS
nS
nS
nS
nS