pc87591l-n05 National Semiconductor Corporation, pc87591l-n05 Datasheet - Page 346

• Manufacturer Part Number: pc87591l-n05
• Description: Lpc Mobile Embedded Controller
• Manufacturer: National Semiconductor Corporation

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7.0 Device Specifications
7.6.3
t
t
t
Symbol
32KCLKIN
CLKINTwk
t
CLKINTst
CLKstab
t
t
32KX1/32KCLKIN
t
t
t
t
t
CLKw
32KW
t
CLKh
32KD
CLKl
CLKr
CLKf
1. t
CLK
CLKINTnom
Clock Timing
32KX2
V
V
BAT
CLK
CC
Figure
123
124
124
124
124
124
125
125
125
125
123
124
is defined in Table 1 on page 214.
Required clock period for
32KCLKIN
CLK period
CLK high time
CLK low time
CLK rise time
CLK fall time
CLK wake-up time
t
t
t
32K oscillator wake-up time After V
CLK delay time
CLK
CLK
CLK
period
period
stabilization time
Description
(Continued)
t
32KW
Figure 123. 32K Waveforms
Clock Output Timing
Clock Input Timing
From RE to RE of 32KCLKIN
At 2.0V (both edges)
At 2.0V (both edges)
At 0.8V (both edges)
0.8V to 2.0V
2.0V to 0.8V
From wake-up event until
CLK starts toggling
Active mode in steady state
After wake-up from Idle
After wake-up from Idle
After V
t
32NOM
346
Reference Conditions
BAT
CC
= 30.517578
> V
> V
CCON
LOWBAT
t
32KD
0.5
0.5
t
(t
t
CLKINTnom
100ppm)
30.5145
CLKINTnom
32NOM
0.99
0.9
5 ns
5 ns
*
*
Min
50
t
t
t
32KCLKIN
CLK
CLK
*
*
1
(t
t
t
100ppm)
30.5206
CLKINTnom
CLKINTnom
32NOM
1.01
1.1
Max
250
100
0.5
40
6
6
1
*
*
0V
0V
Unit
ms
Revision 1.2
ns
ns
ns
s
s
-
-
-
-
s
s