Cypress CY7C67300 Manual De Usuario
CY7C67300
Document #: 38-08015 Rev. *J
Page 85 of 99
AC Timing Characteristics
Reset Timing
Clock Timing
Notes
11. Clock is 12 MHz nominal.
12.
12.
v
XINH is required to be 3.0 V to obtain an internal 50/50 duty cycle clock.
Table 135. Reset Timing Parameters
Parameter
Description
Min
Typical
Max
Unit
t
RESET
nRESET Pulse Width
16
clocks
t
IOACT
nRESET HIGH to nRD or nWRx active
200
µs
nRESET
nRD or nWRL or nWRH
t
RESET
t
IOACT
Reset Timing
Table 136. Clock Timing Parameters
Parameter
Description
Min
Typical
Max
Unit
f
CLK
Clock Frequency
12.0
MHz
v
XINH
Clock Input High
(XTALOUT left floating)
(XTALOUT left floating)
1.5
3.0
3.6
V
t
CLK
Clock Period
83.17
83.33
83.5
ns
t
HIGH
Clock High Time
36
44
ns
t
LOW
Clock Low Time
36
44
ns
t
RISE
Clock Rise Time
5.0
ns
t
FALL
Clock Fall Time
5.0
ns
Duty Cycle
45
55
%
XTALIN
Clock Timing
t
RISE
t
FALL
t
HIGH
t
CLK
t
LOW