pca9502 NXP Semiconductors, pca9502 Datasheet - Page 17

• Manufacturer Part Number: pca9502
• Description: 8-bit I/o Expander With I2c-bus/spi Interface
• Manufacturer: NXP Semiconductors

NXP Semiconductors
Table 17.
All the timing limits are valid within the operating supply voltage, ambient temperature range and output load;
V
All output load = 25 pF, unless otherwise specified.
PCA9502_3
Product data sheet
Symbol
t
t
t
t
t
t
T
t
t
t
t
t
d(CS_NH-SOZ)
su(CS_N-SCLK)
h(CS_N-SCLK)
d(SCLK-SO)
su(SI-SCLK)
h(SI-SCLK)
SCLKH
SCLKL
w(CS_NH)
d9
d13
DD
Fig 16. Detailed SPI-bus timing
Fig 17. SPI write IOState to GPIO switch
SCLK
SCLK
SO
CS
= (2.5 V
SI
R/W = 0; A[3:0] = IOState (0x0B)
t
h(CS_N-SCLK)
GPIOn
SPI-bus timing specifications
SCLK
CS
t
su(SI-SCLK)
0.2 V) or (3.3 V
SI
Parameter
CS HIGH to SO 3-state delay time
CS to SCLK setup time
CS to SCLK hold time
SCLK fall to SO valid delay time
SI to SCLK setup time
SI to SCLK hold time
SCLK period
SCLK HIGH time
SCLK LOW time
CS HIGH pulse width
SPI output data valid time
SPI interrupt clear time
t
R/W
su(CS_N-SCLK)
A3
0.3 V); T
A2
t
h(SI-SCLK)
A1
t
SCLKL
amb
A0
= 40 C to +85 C; and refer to V
0
Rev. 03 — 13 October 2006
t
SCLKH
0
Conditions
C
C
t
SCLKL
L
L
X
= 100 pF
= 100 pF
+ t
D7
SCLKL
D6
t
d(SCLK-SO)
D5
8-bit I/O expander with I
D4
IL
D3
and V
Min
100
200
200
200
20
10
10
83
30
30
V
-
-
DD
D2
IH
= 2.5 V
with an input voltage of V
D1
Max
100
25
-
-
-
-
-
-
-
-
-
-
t
h(CS_N-SCLK)
t
d9
t
D0
d(CS_N-SOZ)
2
Min
100
200
200
200
C-bus/SPI interface
20
20
10
67
25
25
V
-
-
PCA9502
DD
© NXP B.V. 2006. All rights reserved.
002aab878
= 3.3 V
t
w(CS_NH)
Max
100
20
-
-
-
-
-
-
-
-
-
-
SS
002aac429
to V
17 of 25
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
DD
.