W90221X Winbond Electronics Corp America, W90221X Datasheet - Page 37

• Manufacturer Part Number: W90221X
• Description: Pa-risc Embedded Controller
• Manufacturer: Winbond Electronics Corp America

Status reported includes error conditions (parity, overrun, framing, or break interrupt) and
states of TX-FIFO and RX-FIFO.
5.12.2 Block Diagram
Figure 5.12.2.1 Block diagram of UART
5.12.3 Features
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5.12.4 Related Pins
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W90221X version 0.6
SIN0 (input)
SOUT0 (output)
CTS0n (input)
DSR0n (output)
DTR0n (input)
RTS0n (output)
DCD0n (input)
RI0n (output)
Transmitter and receiver are each buffered with 16 bytes FIFO's to reduce the number
of interrupts presented to the CPU
MODEM control functions (CTS, RTS, DSR, DTR, RI and DCD)
Fully programmable serial-interface characteristics:
Line break generation and detection
False start bit detection
Full prioritize interrupt system controls
Loop back mode for internal diagnostic testing
COM0
Even, odd, or no-parity bit generation and detection
1-, 1&1/2, or 2-stop bit generation
Baud rate generation
5-, 6-, 7-, or 8-bit characters
Serial data input from peripheral device or MODEM
Serial data output to peripheral device or MODEM
Clear to send signal
Data set ready
Data terminal ready
Request to send
Data carrier detect
SDO
TX shift register
TX-FIFO (16x8)
& Control
8
OSC (14.318Mhz)
Baud Rate
Generator
32-bit CPU bus
RX shift register
RX-FIFO (16x8)
& Control
8
SDI
Modem
Control
Modem
Status
Reg
Reg
8
RTS#
DTR#
OUT1#
OUT2#
CTS#
DSR#
DCD#
RI#
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