xr20v2172 Exar Corporation, xr20v2172 Datasheet - Page 44

• Manufacturer Part Number: xr20v2172
• Description: Two Channel I2c/spi Uart With 64-byte Fifo And Rs232 Transceiver
• Manufacturer: Exar Corporation

XR20V2172
TWO CHANNEL I2C/SPI UART WITH 64-BYTE FIFO AND RS232 TRANSCEIVER
F
F
IGURE
IGURE
GPIOn
IRQ#
SDA
MODEM pin
IRQ#
SDA
19. M
20. GPIO P
ODEM
ADDRESS
SLAVE
ADDRESS
IN
I
SLAVE
NPUT
I
NTERRUPT
P
IN
W
I
NTERRUPT
W
T
A
D2
A
IOSTATE REG.
MSR REGISTER
T
D4
ACK from slave
A
44
A
S
S
ADDRESS
ADDRESS
SLAVE
SLAVE
ACK from slave
R
R
A
A
T
T
DATA
D5
DATA
D3
ACK from master
A
A
REV. 1.0.0
P