xr20m1280 Exar Corporation, xr20m1280 Datasheet - Page 52

• 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 - I2C-BUS TIMING SPECIFICATIONS
Unless otherwise noted: TA=-40
T
S
T
T
T
T
T
T
VD;ACK
T
YMBOL
T
HD;STA
SU;STA
HD;DAT
VD;DAT
SU;DAT
T
f
T
T
T
T
T
T
T
T
T
HIGH
SCL
LOW
T
T
BUF
D15
SP
D1
D2
D3
D4
D5
D6
D7
D8
F
R
Operating frequency
Bus free time between STOP and START
START condition hold time
START condition setup time
Data hold time
Data valid acknowledge
SCL LOW to data out valid
Data setup time
Clock LOW period
Clock HIGH period
Clock/data fall time
Clock/data rise time
Pulse width of spikes tolerance
I
I
I
I
I
I
I
I
SCL delay after reset
2
2
2
2
2
2
2
2
C-bus GPIO output valid
C-bus modem input interrupt valid
C-bus modem input interrupt clear
C input pin interrupt valid
C input pin interrupt clear
C-bus receive interrupt valid
C-bus receive interrupt clear
C-bus transmit interrupt clear
o
to +85
P
ARAMETER
o
C, VCC_xxxx = 1.62 - 3.63V
PRELIMINARY
52
S
M
TANDARD
250
4.7
4.0
4.7
4.7
4.0
0.5
0.2
0.2
0.2
0.2
0.2
0.2
0.2
1.0
IN
0
0
3
I2C-B
US
1000
M
100
300
M
0.6
0.6
ODE
AX
M
150
1.3
0.6
0.6
1.3
0.6
0.5
0.2
0.2
0.2
0.2
0.2
0.2
0.2
0.5
F
IN
0
0
3
AST
I2C-B
M
ODE
US
400
300
300
M
0.6
0.6
AX
REV. P1.1.1
U
kHz
µs
µs
µs
ns
µs
ns
ns
µs
µs
ns
ns
µs
µs
µs
µs
µs
µs
µs
µs
µs
µs
NIT