lpc1114fn28/102 NXP Semiconductors, lpc1114fn28/102 Datasheet - Page 59

• Manufacturer Part Number: lpc1114fn28/102
• Description: 32-bit Arm Cortex-m0 Microcontroller; Up To 32 Kb Flash And 8 Kb Sram
• Manufacturer: NXP Semiconductors

NXP Semiconductors
Table 21.
LPC1110_11_12_13_14
Product data sheet
Symbol
SPI master (in SPI mode)
T
t
t
t
t
DS
DH
v(Q)
h(Q)
Fig 31. I
cy(clk)
SDA
SCL
2
C-bus pins clock timing
Dynamic characteristics of SPI pins in SPI mode
Parameter
clock cycle time
data set-up time
data hold time
data output valid time in SPI mode
data output hold time in SPI mode
70 %
30 %
S
10.7 SPI interfaces
t
f
t
f
70 %
[6]
[7]
[8]
[9]
[10] A Fast-mode I
30 %
The maximum t
output stage t
SDA and the SCL pins and the SDA/SCL bus lines without exceeding the maximum specified t
In Fast-mode Plus, fall time is specified the same for both output stage and bus timing. If series resistors
are used, designers should allow for this when considering bus timing.
The maximum t
the maximum of t
the device does not stretch the LOW period (t
data must be valid by the set-up time before it releases the clock.
t
transmission and the acknowledge.
t
LOW period of the SCL signal. If such a device does stretch the LOW period of the SCL signal, it must
output the next data bit to the SDA line t
Standard-mode I
meet this set-up time.
1 / f
SU;DAT
SU;DAT
SCL
Conditions
full-duplex mode
when only transmitting
in SPI mode
in SPI mode
is the data set-up time that is measured with respect to the rising edge of SCL; applies to data in
= 250 ns must then be met. This will automatically be the case if the device does not stretch the
t
2.4 V  V
2.0 V  V
1.8 V  V
HD;DAT
70 %
30 %
70 %
f
30 %
2
All information provided in this document is subject to legal disclaimers.
is specified at 250 ns. This allows series protection resistors to be connected in between the
C-bus device can be used in a Standard-mode I
HD;DAT
f
for the SDA and SCL bus lines is specified at 300 ns. The maximum fall time for the SDA
2
VD;DAT
C-bus specification) before the SCL line is released. Also the acknowledge timing must
t
SU;DAT
DD
DD
DD
could be 3.45 s and 0.9 s for Standard-mode and Fast-mode but must be less than
Rev. 6 — 2 November 2011
 3.6 V
< 2.4 V
< 2.0 V
or t
VD;ACK
70 %
30 %
[1]
[1]
[2]
[2]
[2]
[2]
[2]
[2]
by a transition time (see UM10204). This maximum must only be met if
t
LOW
r(max)
Min
50
40
15
20
24
0
-
0
+ t
LOW
SU;DAT
) of the SCL signal. If the clock stretches the SCL, the
t
HIGH
LPC1110/11/12/13/14
= 1000 + 250 = 1250 ns (according to the
32-bit ARM Cortex-M0 microcontroller
70 %
30 %
t
VD;DAT
2
Typ
-
-
-
-
-
-
C-bus system but the requirement
Max
-
-
-
-
10
-
© NXP B.V. 2011. All rights reserved.
002aaf425
f
.
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Unit
ns
ns
ns
ns
ns
ns
ns
ns