GM16C550
GM16C550
ASYNCHRONOUS COMMUNICATIONS
ELEMENT WITH FIFOs
Descriptions
The GM16C550 is an asynchronous communi-
cations element (ACE) that is functionally
equivalent to the GM16C450, and addition-ally
incorporates a 16byte FIFOs are available on both
the transmitter and receiver, and can be activated by
placing the device in the FIFO mode. After a reset,
the registers of the GM16C550 are identical to those
of the GM16C450.
The UART performs serial-to-parallel conver- sion
on data characters received from a peri-pheral
device or a MODEM, and parallel-to- serial
conversion on data characters received from the
CPU. The CPU can read the com- plete status of
the UART at any time during
the functional
operation. Status information reported includes the
type and condition of
the transfer operations
being performed by
the UART, as well as any
error conditions (parity, overrun, framing, or break
interrupt).
Features
Fully compatible with GM16C450.
Modem controm signals include
CTS
,
RTS
,
DSR
,
DTR
,
RI
and -
DCD
.
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Programmable serial characteristics:
— 6-, 7- or 8-bit characters
5-,
— Even-, odd-, or no-parity bit generation and
detection
— 1
1/2
- or 2-stop bit generation
1-,
— Baud rate generation (DC to 256K baud)
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16 byte FIFO reduces CPU interrupts.
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Independent control of transmit, receive, line
status, data set interrupts, FIFOs.
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Full status reporting capabilities
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Three-state, TTL drive capabilities for bi-
derectional data bus and control bus.
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40DIP/44PLCC
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Pin Configulation
D0
D1
D2
D3
D4
D5
D6
D7
RCLK
SIN
SOUT
CS0
CS1
CS2
BAUDQUT
XTAL1
XTAL2
DOSTR
DOSTR
VSS
VCC
RI
DCD
DSR
CTS
MR
OUT1
DTR
RTS
OUT2
INTRPT
RXRDY
A0
A1
A2
ADS
TXRDY
DDIS
DISTR
DISTR
D4
D3
D2
D1
D0
N.C.
VCC
RI
DCD
DSR
CTS
D5
D6
D7
RCLK
SIN
N.C.
SOUT
CS0
CS1
CS2
BAUDQUT
VSS
N.C.
DISTR
DISTR
DDIS
TXRDY
MR
OUT1
DTR
RTS
OUT2
N.C.
INTRPT
RXRDY
A0
A1
A2
1
HYNIX [ HYNIX SEMICONDUCTOR ]
