Datasheet

SPI/MICROWIRE-Compatible
UART in QSOP-16
X1
X2
DOUT
BAUD-RATE
GENERATOR
SPI
INTERFACE
BAUD-RATE
GENERATOR
DIN
SCLK
CS
B0
Pt
TX-SHIFT REGISTER
START/STOP-
BIT DETECT
D0t–D7t
RX-SHIFT REGISTER
D0r–D7r
SHDN
FE
RA
XTAL
B1
B2
B3
RX
TX
9
Pt TX-BUFFER REGISTER
9
Pr
RA/FE
(MASKS)
PrRT
RX-BUFFER REGISTER
Pr
Pr
RX-BUFFER REGISTER
9
9
I / O
CTS
RTS
IRQ
INTERRUPT
LOGIC
TRANSMIT-DONE (TM)
DATA-RECEIVED (RM)
PARITY (PM)
FRAMING ERROR (RAM)/
RECEIVE ACTIVITY
(SOURCES)
ACTIVITY
DETECT
Figure 2. Functional Diagram
The transmitter section accepts SPI/MICROWIRE data,
formats it, and transmits it in asynchronous serial format
from the TX output. Data is loaded into the transmit-
buffer register from the SPI/MICROWIRE interface. The
MAX3100 adds start and stop bits to the data and
clocks the data out at the selected baud rate (Table 7).
MAX3100
6
Maxim Integrated
MAX3100