Cypress CY7C638xx ユーザーズマニュアル
CY7C63310, CY7C638xx
Document 38-08035 Rev. *K
Page 69 of 83
V
DI
Differential Input Sensitivity
0.2
V
V
CM
Differential Input Common Mode
Range
0.8
2.5
V
V
SE
Single Ended Receiver Threshold
0.8
2
V
C
IN
Transceiver Capacitance
20
pF
I
IO
Hi-Z State Data Line Leakage
0V < V
IN
< 3.3V
–10
10
μA
PS/2 Interface
V
V
OLP
Static Output Low
SDATA or SCLK pins
0.4
V
R
PS2
Internal PS/2 Pull up Resistance
SDATA, SCLK pins, PS/2 Enabled
3
7
K
Ω
General Purpose IO Interface
R
R
UP
Pull Up Resistance
4
12
K
Ω
V
ICR
Input Threshold Voltage Low, CMOS
mode
Low to High edge
40%
65%
V
CC
V
ICF
Input Threshold Voltage Low, CMOS
mode
High to Low edge
30%
55%
V
CC
V
HC
Input Hysteresis Voltage, CMOS
Mode
High to low edge
3%
10%
V
CC
V
ILTTL
Input Low Voltage, TTL Mode
[9]
IO pin Supply = 4.0–5.5V
0.8
V
V
IHTTL
Input High Voltage, TTL Mode
[9]
IO pin Supply = 4.0–5.5V
2.0
V
V
OL1
Output Low Voltage, High Drive
I
OL1
= 50 mA
0.8
V
V
OL2
Output Low Voltage, High Drive
I
OL1
= 25 mA
0.4
V
V
OL3
Output Low Voltage, Low Drive
I
OL2
= 8 mA
0.4
V
V
OH
Output High Voltage
I
OH
= 2 mA
V
CC
– 0.5
V
C
LOAD
Maximum Load Capacitance
[9]
50
pF
27. DC Characteristics
(continued)
Parameter
Description
Conditions
Min
Typical
Max
Unit
General
28. AC Characteristics
Parameter
Description
Conditions
Min
Typical
Max
Unit
Clock
T
T
ECLKDC
External Clock Duty Cycle
45
55
%
T
ECLK1
External Clock Frequency
External clock is the source of the
CPUCLK
0.187
24
MHz
T
ECLK2
External Clock Frequency
External clock is not the source of the
CPUCLK
0
24
MHz
F
IMO1
Internal Main Oscillator Frequency
No USB present
22.8
25.2
MHz
F
IMO2
Internal Main Oscillator Frequency
With USB present
23.64
24.3
MHz
F
ILO1
Internal Low Power Oscillator
Normal mode
29.44
37.12
kHz
F
ILO2
Internal Low Power Oscillator
Low power mode
35.84
47.36
kHz
3.3V Regulator
V
V
ORIP
Output Ripple Voltage
10 Hz to 100 MHz at CLOAD = 1
μF
200
mV
p-p
Notes
7. Available only in CY7C638xx P1.3, P1.4, P1.5, P1.6, P1.7.
8. Except for pins P1.0 and P1.1 in the GPIO mode.
9. Except for pins P1.0 and P1.1.
8. Except for pins P1.0 and P1.1 in the GPIO mode.
9. Except for pins P1.0 and P1.1.