參數(shù)資料
型號: PD6710
廠商: Intel Corp.
英文描述: ISA-to-PC-Card (PCMCIA) Controllers
中文描述: ISA -到- PC卡(PCMCIA)的控制器
文件頁數(shù): 104/138頁
文件大?。?/td> 723K
代理商: PD6710
PD6710/
22
ISA-to-PC-Card (PCMCIA) Controllers
104
Datasheet
16.3
AC
Timing Specifications
This section includes system timing requirements for the PD67XX. Timings are provided in
nanoseconds (ns), at TTL input levels, with the ambient temperature varying from 0
°
C to 70
°
C,
and V
CC
varying from 3.0 to 3.6 V or 4.5 to 5.5 V DC. The AT bus speed is 10 MHz unless
otherwise noted. Note that an asterisk (*) denotes an active-low signal for the ISA bus interface,
and a dash (-) denotes an active-low signal for the PC Card socket interface.
Additionally, the following statements are true for all timing information:
All timings assume a load of 50 pF.
TTL signals are measured at TTL threshold; CMOS signals are measured at CMOS threshold.
16.4
ISA Bus Timing
Table 25. List of AC Timing Specifications
Title
Page Number
Table 26
ISA Bus Timing
104
Table 27
Reset Timing
107
Table 28
Pulse Mode Interrupt Timing
107
Table 29
General-Purpose Strobe Timing
108
Table 30
Input Clock Specification
108
Table 31
Memory Read/Write Timing (Word Access)
111
Table 32
Word I/O Read/Write Timing
112
Table 33
PC Card Read/Write Timing when System Is 8-Bit
113
Table 34
Normal Byte Read/Write Timing
114
Table 35
16-Bit System to 8-Bit I/O Card: Odd Byte Timing
115
Table 36
DMA Read Cycle Timing (PD6722 only)
116
Table 37
DMA Write Cycle Timing (PD6722 only)
118
Table 38
DMA Request Timing (PD6722 only)
119
Table 26. ISA Bus Timing
(Sheet 1 of 2)
Symbol
Parameter
MIN
MAX
Unit
t
1
MEMCS16* active delay from LA[23:17] valid
40
ns
t
1a
LA[23:17] setup to ALE inactive
30
ns
t
1b
LA[23:17] hold from ALE inactive
5
ns
t
2
IOCS16* active delay from SA[15:0]
1
40
ns
1. AEN must be inactive for t
, t
, and t
timing specifications to be applicable.
2. Command is defined as IOR*, IOW*, MEMR*, or MEMW*.
3. Except for valid card memory writes, which are zero wait state when internal write FIFO is not full.
4. If card is removed during a card access cycle, IOCHRDY is three-stated without waiting for end of Command.
5. Based on 25-MHz internal clock, produced either by an internal synthesizer and 14.318-MHz signal applied to CLK pin, or by
supplying 25 MHz directly to CLK pin and bypassing the internal synthesizer.
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