參數資料
型號: DZPD6722VCCE
廠商: INTEL CORP
元件分類: 總線控制器
英文描述: ISA-to-PC-Card (PCMCIA) Controllers
中文描述: PCMCIA BUS CONTROLLER, PQFP208
封裝: LQFP-208
文件頁數: 109/138頁
文件大?。?/td> 723K
代理商: DZPD6722VCCE
ISA-to-PC-Card (PCMCIA) Controllers
PD6710/
22
Datasheet
109
16.4.5
PC Card Bus Timing Calculations
Calculations for minimum PC Card cycle Setup, Command, and Recovery timings are made by
first calculating factors derived from the applicable timer set
s timing registers and then by
applying the factor to an equation relating it to the internal clock period.
The PC Card cycle timing factors, in terms of the number of internal clocks, are calculated as
follows:
S
= (
N
pres
×
N
val
) + 1
C
= (
N
pres
×
N
val
) + 1
R
= (
N
pres
×
N
val
) + 1
T
CLKP
Input clock period,
internal clock
69.84
0.1%
69.84 + 0.1%
ns
Normal synthesizer
operation. Misc Control 2
register, bit 0 =
0
. CLK
pin at 14.318 MHz.
T
CLKP
Input clock period,
external clock
40
0.1%
40 + 0.1%
ns
Synthesizer bypassed.
Misc Control 2 register,
bit 0 =
1
.
CLK pin at 25 MHz.
V
IHmin
CLK input high voltage
2.0
V
CORE_VDD = 3.0 V
V
ILmax
CLK input low voltage
0.8
V
CORE_VDD = 3.6 V
V
IHCmin
CLK input high voltage
0.7 V
DD
V
CORE_VDD = 4.5 V
V
ILCmax
CLK input low voltage
0.2 V
DD
V
CORE_VDD = 5.5 V
Figure 22. Input Clock Specification
Table 30. Input Clock Specification
(Sheet 2 of 2)
Symbol
Parameter
MIN
MAX
Units
Conditions
t
1
V
ILmax
, V
ILCmax
t
2
t
3
t
4
T
CLKP
CLK
V
IHmin
, V
IHCmin
V
center
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