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February 25, 2005
Document No. 38-12022 Rev. *G
27
CY8C21x23 Final Data Sheet
3. Electrical Specifications
3.4.6
AC Programming Specifications
The following table lists guaranteed maximum and minimum specifications for the voltage and temperature ranges: 4.75V to 5.25V
and -40
°
C
≤
T
A
≤
85
°
C, or 3.0V to 3.6V and -40
°
C
≤
T
A
≤
85
°
C, respectively. Typical parameters apply to 5V, 3.3V, or 2.7V at 25
°
C
and are for design guidance only.
3.4.7
AC I
2
C Specifications
The following table lists guaranteed maximum and minimum specifications for the voltage and temperature ranges: 4.75V to 5.25V
and -40
°
C
≤
T
A
≤
85
°
C, 3.0V to 3.6V and -40
°
C
≤
T
A
≤
85
°
C, or 2.4V to 3.0V and -40
°
C
≤
T
A
≤
85
°
C, respectively. Typical parameters
apply to 5V, 3.3V, or 2.7V at 25
°
C and are for design guidance only.
Table 3-24. AC Programming Specifications
Symbol
T
RSCLK
T
FSCLK
T
SSCLK
T
HSCLK
F
SCLK
T
ERASEB
T
WRITE
T
DSCLK3
T
DSCLK2
Description
Min
Typ
Max
Units
ns
Notes
Rise Time of SCLK
1
–
20
Fall Time of SCLK
1
–
20
ns
Data Set up Time to Falling Edge of SCLK
40
–
–
ns
Data Hold Time from Falling Edge of SCLK
40
–
–
ns
Frequency of SCLK
0
–
8
MHz
Flash Erase Time (Block)
–
15
–
ms
Flash Block Write Time
–
30
–
ms
Data Out Delay from Falling Edge of SCLK
–
–
50
ns
3.0
≤
Vdd
≤
3.6
2.4
≤
Vdd
≤
3.0
Data Out Delay from Falling Edge of SCLK
–
–
70
ns
Table 3-25. AC Characteristics of the I
2
C SDA and SCL Pins for Vcc
≥
3.0V
Symbol
F
SCLI2C
T
HDSTAI2C
Description
Standard Mode
Min
Fast Mode
Min
Units
kHz
Notes
Max
Max
SCL Clock Frequency
0
100
0
400
Hold Time (repeated) START Condition. After this period,
the first clock pulse is generated.
LOW Period of the SCL Clock
4.0
–
0.6
–
μ
s
T
LOWI2C
T
HIGHI2C
T
SUSTAI2C
T
HDDATI2C
T
SUDATI2C
T
SUSTOI2C
T
BUFI2C
T
SPI2C
4.7
–
1.3
–
μ
s
μ
s
μ
s
μ
s
HIGH Period of the SCL Clock
4.0
–
0.6
–
Set-up Time for a Repeated START Condition
4.7
–
0.6
–
Data Hold Time
0
–
0
–
Data Set-up Time
0
Set-up Time for STOP Condition
250
0
4.0
–
0
–
100
a
0.6
a. A Fast-Mode I2C-bus device can be used in a Standard-Mode I2C-bus system but the requirement t
SU;DAT
≥
250 ns must then be met. This will automatically be the case if
the device does not stretch the LOW period of the SCL signal. If such device does stretch the LOW period of the SCL signal, it must output the next data bit to the SDA line
t
rmax
+ t
SU;DAT
= 1000 + 250 = 1250 ns (according to the Standard-Mode I2C-bus specification) before the SCL line is released.
–
0
–
ns
0
μ
s
μ
s
Bus Free Time Between a STOP and START Condition
4.7
–
1.3
–
Pulse Width of spikes are suppressed by the input filter.
–
–
0
50
ns