xr20m1280 Exar Corporation, xr20m1280 Datasheet - Page 56

• Manufacturer Part Number: xr20m1280
• Description: I2c/spi Uart With 128-byte Fifo And Integrated Level Shifters
• Manufacturer: Exar Corporation

XR20M1280
I2C/SPI UART WITH 128-BYTE FIFO AND INTEGRATED LEVEL SHIFTERS
AC ELECTRICAL CHARACTERISTICS - SPI-BUS TIMING SPECIFICATIONS
Unless otherwise noted: TA=-40
F
IGURE
S
T
YMBOL
T
T
T
T
T
T
T
C S#
SC L
f
T
T
T
T
T
T
T
T
SO
SCL
CSW
SI
CSS
CSH
D10
D12
D13
D14
D11
DO
TR
DS
DH
CP
CH
CL
D9
29. SPI-B
T
C S H
Operating frequency
CS# HIGH to SO three-state time
CS# to SCL setup time
CS# to SCL hold time
SCL fall to SO valid time
SI to SCL setup time
SI to SCL hold time
SCL period
SCL HIGH time
SCL LOW time
CS# HIGH pulse width
SPI output data valid
SPI modem output data valid
SPI transmit interrupt clear
SPI modem input interrupt clear
SPI input pin interrupt clear
SPI receive interrupt clear
US
T
T
C SS
T
D S
IMING
T
D H
o
to +85
P
ARAMETER
T
C L
o
C, Vcc=1.62 - 3.63V
T
C H
PRELIMINARY
...
...
...
...
56
M
100
100
250
100
100
200
200
200
200
200
200
200
20
20
IN
T
D O
100
100
M
26
AX
T
C SH
U
MHz
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
NIT
T
TR
C
C
T
C
T
C SW
L
L
ONDITIONS
CH
= 100 pF
= 100 pF
REV. P1.1.1
+ T
CL