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| 型號： | IQX160-7PQ208 |
| 英文描述： | User Programmable Special Function ASIC |
| 中文描述： | 用戶可編程ASIC的特殊功能 |
| 文件頁數(shù)： | 18/65頁 |
| 文件大?。?/td> | 620K |
| 代理商： | IQX160-7PQ208 |
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IQX Family Data Sheet
18
Revision 5.0
June 2000
1.4.2 I/O Port Configuration
Configuring I/O Ports using the RapidConfigure interface
involves two steps. During the first step the 50-bit I/O Port
Configuration Holding Register, consisting of seven 8-bit
segments, is loaded with the configuration data. The loading is
accomplished one 8-bit segment at a time, and may take up to 7
RapidConfigure cycles to load this register. In the second step,
the data in the I/O Port Configuration Holding Register is
completely transferred to the individual I/O Ports in a single
RapidConnect cycle. A single I/O Port, or a group of 2, 4, 8 or 16
contiguous
I/O Ports with a starting address of modulo 2, 4, 8 or
16 respectively, (and requiring the same configuration) can be
configured in a single RapidConfigure cycle during this step.
When using RapidConfigure for configuring I/O Ports, the
Control bus, {P/S = 1, C[1:0]} specifies the type of operation; and
the Row and Column Addresses provide the information about
the I/O Port, or the group of ports to be configured. P/S is set to
1 when configuring I/O Ports using RapidConfigure. Refer to
Table 5 for details. The I/O Port information specified in the Row
and Column address values applies to the I/O pad location on
the
die
. When using the RapidConfigure interface for configuring
bondout versions such as the IQX240B and IQX128B proper
translation for I/O Port number on the package to the
corresponding I/O Port number on the die must first be made.
Refer to Appendix A for the mapping.
I/O Ports used for the RapidConfigure interface P/
S
, C[1:0], RA,
CA, WE and STROBE, cannot be configured using the
RapidConfigure interface. Combinations not listed in Table 5 may
result in unpredictable results and should be avoided.
Notes:
(1)
“sss” is the 8-bit segment in the 50-bit I/O Port Configuration Holding Register and dddddddd is the 8-bit data to be loaded. Right most bits are
LSBs.
(2) “ppppp....” is the I/O Port or I/O Port Group number to be configured. This vector is 9-bits long or less, depending on the device and size of the
I/O Port Group. The I/O Port Group is a contiguous group of I/O Ports with the lowest I/O Port number being (ppppp....) multiplied by (Number of
Ports in the Group).
(3) “r” is the I/O Port number on the die corresponding to the highest I/O Port number on the package that can be configured using RapidConfigure.
1.4.3 I/O Port Configuration Holding Register
I/O Port Configuration Holding Register is used to hold the data
that is to be loaded into the I/O Port Configuration Register. This
50-bit holding register consists of six 8-bit segments and one 2-
bit segment, and is loaded one segment at a time using the
RapidConfigure interface.
Using the RapidConfigure interface, the holding register is first
loaded with 50 bits of data that defines the I/O Port function. The
data is then transferred into the I/O Port Configuration
Register(s), also using the RapidConfigure interface. Depending
on the current contents of the holding register segments, it may
take 7 RapidConfigure cycles or less to load the holding register.
The holding register contains unknown values when the device
is reset.
Table 6 describes the I/O Port programmng bits and shows their
location in the I/O Port Configuration Holding Register. Table 7
shows the bit values for the various I/O Port configurations.
Operation
Control Bus
{P/S, C[1:0]}
110
111
111
111
111
111
IQX320, IQX240B
Row Add.
RA[8:0]
000000sss
ppppppppp
pppppppp0
ppppppp00
pppppp000
ppppp0000
IQX160
IQX128B
Col. Add.
CA[8:0]
0dddddddd
000000001
000000011
000000111
000001111
000011111
Row Add.
RA[7:0]
0000sssd
pppppppp
ppppppp0
pppppp00
ppppp000
pppp0000
Col. Add.
CA[7:0]
0ddddddd
00000001
00000011
00000111
00001111
00011111
Row Add.
RA[6:0]
000sssd
ppppppp
pppppp0
ppppp00
pppp000
ppp0000
Col. Add.
CA[6:0]
ddddddd
0000001
0000011
0000111
0001111
0011111
Load Configuration Register
(1)
Configure Port i [0
≤
i
≤
r]
(2,3)
Configure 2 I/O Port Group
Configure 4 I/O Port Group
Configure 8 I/O Port Group
Configure 16 I/O Port Group
Table 5. Configuring I/O Ports Using RapidConfigure Interface
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