LPC1777 View Datasheet(PDF) - NXP Semiconductors.
Part Name
Description
MFG CO.
LPC1777
NXP Semiconductors.
'LPC1777' PDF : 120 Pages View PDF
NXP Semiconductors
LPC178x/7x
32-bit ARM Cortex-M3 microcontroller
11.3 External clock
Table 23. Dynamic characteristic: external clock (see Figure 36)
Tamb = 40 C to +85 C; VDD(3V3) over specified ranges.
Symbol
Parameter
Min
Typ
fosc
oscillator frequency
1
12
Tcy(clk)
tCHCX
tCLCX
clock cycle time
clock HIGH time
clock LOW time
40
Tcy(clk) 0.4
Tcy(clk) 0.4
83.3
-
-
tCLCH
clock rise time
-
-
tCHCL
clock fall time
-
-
Max
25
1000
-
-
5
5
Unit
MHz
ns
ns
ns
ns
ns
tCHCL
tCLCX
tCHCX
tCLCH
Tcy(clk)
002aaa907
Fig 20. External clock timing (with an amplitude of at least Vi(RMS) = 200 mV)
11.4 Internal oscillators
Table 24. Dynamic characteristic: internal oscillators
Tamb = 40 C to +85 C; 2.7 V VDD(REG)(3V3) 3.6 V.[1]
Symbol
Parameter
Min
fosc(RC)
internal RC oscillator frequency 11.88
fi(RTC)
RTC input frequency
-
Typ[2]
12
32.768
Max
12.12
-
Unit
MHz
kHz
[1] Parameters are valid over operating temperature range unless otherwise specified.
[2] Typical ratings are not guaranteed. The values listed are at room temperature (25 C), nominal supply
voltages.
11.5 I/O pins
Table 25. Dynamic characteristic: I/O pins[1]
CL = 10 pF, Tamb = 40 C to +85 C; VDD(3V3) = 3.0 V to 3.6 V.
Symbol
Parameter Conditions
Min
tr
rise time
pin configured as
3.0
output
tf
fall time
pin configured as
2.5
output
[1] Applies to standard port pins.
Typ
Max Unit
-
5.0
ns
-
5.0
ns
LPC178X_7X
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 5.5 — 26 April 2016
© NXP Semiconductors N.V. 2016. All rights reserved.
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