
Cypress MicroSystems CY8C25122/CY8C26233/CY8C26443/CY8C26643 Family Data Sheet
136
Document #: 38-12010 CY Rev. ** CMS Rev. 3.20
September 5, 2002
13.3
AC Characteristics
Table 115:
AC Operating Specifications
Symbol
AC Operating Specifications
Minimum
Typical
Maximum
Unit
F
CPU1
CPU Frequency (5 V Nominal)
1,2,3
1.
2.
4.75V < V
cc
< 5.25V.
Accuracy derived from Internal Main Oscillator with appropriate trim for V
cc
range.
0
o
C to +85
o
C.
3.0V < V
cc
< 3.6V.
See Application Note AN2012 ”Adjusting PSoC Microcontroller Trims for Dual Voltage-Range Operation” f
or infor-
mation on maximum frequency for User Modules.
Limits are valid only when
not
in sleep mode.
Limits are valid only when in sleep mode.
Accuracy is capacitor and crystal dependent.
Is a multiple (x732) of crystal frequency.
10. Load capacitance = 50 pF.
11. To minimum allowable voltage for desired frequency.
12. The crystal oscillator frequency is guaranteed to be within 1% of its final value by the end of the 1s startup timer
period. Timer period may be as short as 640 ms for the case where F
32K1
is 50 kHz. Correct operation assumes a
properly loaded 1uW maximum drive level 32.768 kHz crystal.
13. The crystal oscillator frequency is within 100 ppm of its final value by the end of the T
osacc
period. Correct opera-
tion assumes a properly loaded 1 uW maximum drive level 32.768 kHz crystal. 3.0V <= V
cc
<= 5.5V, -40
o
C <= T
A
<= 85
o
C.
3.
4.
5.
91.35
2,400
2,460
kHz
F
CPU2
CPU Frequency (3.3V Nominal)
4,3
91.35
1,200
1,230
kHz
F
48M
Digital PSoC Block Frequency
48
49.2
1,5
MHz
F
24M
Digital PSoC Block Frequency
24
24.6
2,4
MHz
F
GPIO
GPIO Operating Frequency
12
MHz
F
IMO
Internal Main Oscillator Frequency
(0
o
C to +85
o
C)
23.4
24
24.6
MHz
F
IMOC
Internal Main Oscillator Frequency Cold
(-40
o
C to 0
o
C)
22.44
24
24.6
MHz
F
32K1
Internal Low Speed Oscillator Frequency
(Non Sleep)
15
6
6.
7.
8.
9.
32
50
kHz
F
32K2
Internal Low Speed Oscillator Frequency
(Sleep or Halt)
15
7
32
64
kHz
F
32K3
External Crystal Oscillator
-
32.768
8
-
kHz
F
pll
PLL Frequency
-
23.986
9
-
MHz
T
f
Output Fall Time
2
10
-
12
ns
T
r
Output Rise Time
3
9
-
18
ns
T
pllslew
PLL Lock Time
0.5
-
10
ms
SV
dd
V
dd
Rise Rate at Power Up
.080
11
-
-
mV/ms
T
os
External Crystal Oscillator Startup to 1%
-
100
500
12
ms
T
osacc
External Crystal Oscillator Startup to 100 ppm
-
150
600
13
ms
T
xrst
External Reset Pulse Width
1
-
-
μ
s