Datasheet

LPC185X_3X_2X_1X All information provided in this document is subject to legal disclaimers. © NXP Semiconductors N.V. 2014. All rights reserved.
Product data sheet Rev. 4.1 — 6 May 2014 109 of 148
NXP Semiconductors
LPC185x/3x/2x/1x
32-bit ARM Cortex-M3 microcontroller
11.9 USART interface
Fig 27. I
2
S-bus timing (transmit)
Fig 28. I
2
S-bus timing (receive)
002aag497
I2Sx_TX_SCK
I2Sx_TX_SDA
I2Sx_TX_WS
T
cy(clk)
t
f
t
r
t
WH
t
WL
t
v(Q)
t
v(Q)
002aag498
T
cy(clk)
t
f
t
r
t
WH
t
su(D)
t
h(D)
t
su(D)
t
su(D)
t
WL
I2Sx_RX_SCK
I2Sx_RX_SDA
I2Sx_RX_WS
Table 23. Dynamic characteristics: USART interface
T
amb
=  40  C to 105  C; 2.2 V  V
DD(REG)(3V3)
 3.6 V; 2.7 V  V
DD(IO)
 3.6 V; C
L
= 20 pF.
Simulated values.
Symbol Parameter Conditions Min Typ Max Unit
T
cy(clk)
clock cycle time on pins Ux_UCLK - 0.1 - s
output
t
v(Q)
data output valid time on pin Ux_TXD - 6.5 - ns