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STPC4HEBI Datasheet(PDF) 46 Page - STMicroelectronics

Part No. STPC4HEBI
Description  X86 Core PC Compatible Information Appliance System-on-Chip
Download  93 Pages
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Maker  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
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STPC4HEBI Datasheet(HTML) 46 Page - STMicroelectronics

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ELECTRICAL SPECIFICATIONS
46/93
Release 1.5 - January 29, 2002
41
SA[19:0] SBHE valid to IOCHRDY negated
41a
Memory access to 16-bit ISA Slave
6T
Cycles
41b
Memory access to 8-bit ISA Slave
12T
Cycles
41c
I/O access to 16-bit ISA Slave
6T
Cycles
41d
I/O access to 8-bit ISA Slave
12T
Cycles
42
SA[19:0] SBHE valid to read data valid
42b
Memory access to 16-bit ISA Slave Standard cycle
4T
Cycles
42e
Memory access to 8-bit ISA Slave Standard cycle
10T
Cycles
42h
I/O access to 16-bit ISA Slave Standard cycle
4T
Cycles
42l
I/O access to 8-bit ISA Slave Standard cycle
10T
Cycles
47
MEMR#, MEMW#, SMEMR#, SMEMW#, IOR#, IOW# asserted to IOCHRDY negated
47a
Memory access to 16-bit ISA Slave
2T
Cycles
47b
Memory access to 8-bit ISA Slave
5T
Cycles
47c
I/O access to 16-bit ISA Slave
2T
Cycles
47d
I/O access to 8-bit ISA Slave
5T
Cycles
48
MEMR#, SMEMR#, IOR# asserted to read data valid
48b
Memory access to 16-bit ISA Slave Standard Cycle
2T
Cycles
48e
Memory access to 8-bit ISA Slave Standard Cycle
5T
Cycles
48h
I/O access to 16-bit ISA Slave Standard Cycle
2T
Cycles
48l
I/O access to 8-bit ISA Slave Standard Cycle
5T
Cycles
54
IOCHRDY asserted to read data valid
54a
Memory access to 16-bit ISA Slave
1T(R)/2T(W)
Cycles
54b
Memory access to 8-bit ISA Slave
1T(R)/2T(W)
Cycles
54c
I/O access to 16-bit ISA Slave
1T(R)/2T(W)
Cycles
54d
I/O access to 8-bit ISA Slave
1T(R)/2T(W)
Cycles
55a
IOCHRDY asserted to MEMR#, MEMW#, SMEMR#, SMEMW#,
IOR#, IOW# negated
1T
Cycles
55b
IOCHRY asserted to MEMR#, SMEMR# negated (refresh)
1T
Cycles
56
IOCHRDY asserted to next ALE# asserted
2T
Cycles
57
IOCHRDY asserted to SA[19:0], SBHE invalid
2T
Cycles
58
MEMR#, IOR#, SMEMR# negated to read data invalid
0T
Cycles
59
MEMR#, IOR#, SMEMR# negated to data bus float
0T
Cycles
61
Write data before MEMW# asserted
61a
Memory access to 16-bit ISA Slave
2T
Cycles
61b
Memory access to 8-bit ISA Slave (Byte copy at end of
start)
2T
Cycles
61
Write data before SMEMW# asserted
61c
Memory access to 16-bit ISA Slave
2T
Cycles
61d
Memory access to 8-bit ISA Slave
2T
Cycles
61
Write Data valid before IOW# asserted
61e
I/O access to 16-bit ISA Slave
2T
Cycles
61f
I/O access to 8-bit ISA Slave
2T
Cycles
64a
MEMW# negated to write data invalid - 16-bit
1T
Cycles
64b
MEMW# negated to write data invalid - 8-bit
1T
Cycles
64c
SMEMW# negated to write data invalid - 16-bit
1T
Cycles
64d
SMEMW# negated to write data invalid - 8-bit
1T
Cycles
Table 4-13. ISA Bus AC Timing
Name
Parameter
Min
Max
Units
Note: The signal numbering refers to Table 4-7


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