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SC16IS752 Datasheet(PDF) 45 Page - NXP Semiconductors

Part No. SC16IS752
Description  Dual UART with I2C-bus/SPI interface, 64 bytes of transmit and receive FIFOs, IrDA SIR built-in support
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Manufacturer  NXP [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo NXP - NXP Semiconductors

SC16IS752 Datasheet(HTML) 45 Page - NXP Semiconductors

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SC16IS752_SC16IS762_7
© NXP B.V. 2008. All rights reserved.
Product data sheet
Rev. 07 — 19 May 2008
45 of 59
NXP Semiconductors
SC16IS752/SC16IS762
Dual UART with I2C-bus/SPI interface, 64-byte FIFOs, IrDA SIR
14. Dynamic characteristics
[1]
A detailed description of the I2C-bus specification, with applications, is given in user manual UM10204:
“I2C-bus specification and user
manual”. This may be found at www.nxp.com/acrobat_download/usermanuals/UM10204_3.pdf.
[2]
Minimum SCL clock frequency is limited by the bus time-out feature, which resets the serial bus interface if SDA is held LOW for a
minimum of 25 ms.
[3]
2 XTAL1 clock cycles or 3
µs, whichever is less.
Table 37.
I2C-bus timing specifications[1]
All the timing limits are valid within the operating supply voltage, ambient temperature range and output load;
VDD = 2.5 V ± 0.2 V, Tamb = −40 °Cto+85 °C; or VDD = 3.3 V ± 0.3 V, Tamb = −40 °Cto+95 °C; VIL and VIH refer to input
voltage of VSS to VDD. All output load = 25 pF, except SDA output load = 400 pF.
Symbol
Parameter
Conditions
Standard-mode
I2C-bus
Fast-mode
I2C-bus
Unit
Min
Max
Min
Max
fSCL
SCL clock frequency
[2]
0
100
0
400
kHz
tBUF
bus free time between a STOP and START
condition
4.7
-
1.3
-
µs
tHD;STA
hold time (repeated) START condition
4.0
-
0.6
-
µs
tSU;STA
set-up time for a repeated START condition
4.7
-
0.6
-
µs
tSU;STO
set-up time for STOP condition
4.7
-
0.6
-
µs
tHD;DAT
data hold time
0
-
0
-
ns
tVD;ACK
data valid acknowledge time
-
0.6
-
0.6
µs
tVD;DAT
data valid time
SCL LOW to
data out valid
-
0.6
-
0.6
ns
tSU;DAT
data set-up time
250
-
150
-
ns
tLOW
LOW period of the SCL clock
4.7
-
1.3
-
µs
tHIGH
HIGH period of the SCL clock
4.0
-
0.6
-
µs
tf
fall time of both SDA and SCL signals
-
300
-
300
ns
tr
rise time of both SDA and SCL signals
-
1000
-
300
ns
tSP
pulse width of spikes that must be
suppressed by the input filter
-
50
-
50
ns
td1
I2C-bus GPIO output valid time
0.5
-
0.5
-
µs
td2
I2C-bus modem input interrupt valid time
0.2
-
0.2
-
µs
td3
I2C-bus modem input interrupt clear time
0.2
-
0.2
-
µs
td4
I2C input pin interrupt valid time
0.2
-
0.2
-
µs
td5
I2C input pin interrupt clear time
0.2
-
0.2
-
µs
td6
I2C-bus receive interrupt valid time
0.2
-
0.2
-
µs
td7
I2C-bus receive interrupt clear time
0.2
-
0.2
-
µs
td8
I2C-bus transmit interrupt clear time
1.0
-
0.5
-
µs
td15
SCL delay after reset
[3]
3-
3
-
µs
tw(rst)
reset pulse width
3
-
3
-
µs


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