lpc1778 NXP Semiconductors, lpc1778 Datasheet - Page 85

• Manufacturer Part Number: lpc1778
• Description: 32-bit Arm Cortex-m3 Microcontroller; Up To 512 Kb Flash And 96 Kb Sram; Usb Device/host/otg; Ethernet; Lcd; Emc
• Manufacturer: NXP Semiconductors

NXP Semiconductors
LPC178x_7x
Objective data sheet
Fig 17. External memory write access
BLS/WE
addr
data
OE
CS
11.3 External clock
Table 15.
T
[1]
[2]
Symbol
f
T
t
t
t
t
osc
CHCX
CLCX
CLCH
CHCL
amb
Fig 18. Signal timing
cy(clk)
Parameters are valid over operating temperature range unless otherwise specified.
Typical ratings are not guaranteed. The values listed are at room temperature (25 °C), nominal supply
voltages.
=
−
40
°
Dynamic characteristic: external clock
C to +85
output signal (O)
Parameter
oscillator frequency
clock cycle time
clock HIGH time
clock LOW time
clock rise time
clock fall time
input signal (I)
All information provided in this document is subject to legal disclaimers.
reference
t
CSLBLSL
t
t
°
CSLWEL
AVCSL
t
clock
C; V
CSLDV
Rev. 00.04 — 8 July 2010
DD(3V3)
t
d(XXX)
over specified ranges.
t
WELDV
t
t
BLSLBLSH
WELWEH
Conditions
32-bit ARM Cortex-M3 microcontroller
t
t
t
t
t
BLSHANV
BLSHDNV
WEHANV
WEHDNV
su(D)
[1]
Min
1
40
T
T
-
-
t
t
h(XXX)
h(D)
cy(clk)
cy(clk)
× 0.4
× 0.4
LPC178x/7x
-
Typ
-
-
-
-
-
002aad636
© NXP B.V. 2010. All rights reserved.
002aad956
[2]
Max
25
1000
-
-
5
5
85 of 112
Unit
MHz
ns
ns
ns
ns
ns