Epic EI16C554 Datasheet
11
Semiconductor, Inc.
FEATURES
• 5V Operation
• Pin to pin and functional compatible to
16C454
• 16 byte transmit FIFO
• 16 byte receive FIFO with error flags
• Modem control signals ( CTSÔ, RTSÔ,
DSRÔ, DTRÔ, RIÔ, CDÔ)
• Programmable character lengths (5, 6, 7, 8)
• Even, odd, or no parity bit generation and
detection
• Status report register
• Independent transmit and receive control
• TTL compatible inputs, outputs
• Software compatible with 8250 and
Ei16C550
• 460.8 kHz transmit/receive operation with
7.372 MHz crystal or external clock source
Ei16C554
QUAD UART
DESCRIPTION
The Ei16C554 is Universal Asynchronous Receiver
and Transmitter with 16 byte transmit and receive
FIFO. Aprogrammable baud rate generator is provided
to select transmit and receive clock rates from 50 Hz to
1.5MHz.
The Ei16C554 is an improved version of the Ei16C550
UART with higher operating speed and lower access
time. The Ei16C554 on board status registers provides
the error conditions, type and status of the transfer
operation being performed. Included is complete
MODEM control capability, and a processor interrupt
system that may be software tailored to the user?s
requirements. The Ei16C554 provides internal loopback capability for on board diagnostic testing.
The Ei16C554 is fabricated in an advanced CMOS
process to achieve low drain power and high speed
requirements.
PIN CONFIGURATION
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
DSRAÔ
CTSAÔ
DTRAÔ
VCC
RTSAÔ
INTA
CSAÔ
TXA
IOWÔ
TXB
CSBÔ
INTB
RTSBÔ
GND
DTRB
CTSDÔ
DSRBÔ
DSRA*
CTSA*
DTRA*
VCC
RTSA*
INTA
CSA*
TXA
IOW*
TXB
CSB*
INTB
RTSB*
GND
DTRB
CTSD*
DSRDÔ
CTSDÔ
DTRDÔ
GND
RTSDÔ
INTD
CSDÔ
TXD
IORÔ
TXC
CSCÔ
INTC
RTSCÔ
VCC
DTRCÔ
CTSCÔ
DSRCÔ
DSRD*
CTSD*
DTRD*
GND
RTSD*
INTD
CSD*
TXD
IOR*
TXC
CSC*
INTC
RTSC*
VCC
DTRC*
CTSC*
CDBÔ
RIBÔ
RXBÔ
VCC
NC
A2A1A0
XTAL1
XTAL2
ERSET
RXRDYÔ
TXRDÔ
GND
RXC
RICÔ
CDCÔ
DSRB*
CDB*
RIB*
RXB*
VCC
A2A1A0
XTAL1
XTAL2
RESET
GND
RXC
RIC*
CDC*
DSRC*
CDAÔ
RIAÔ
RXA
GNDD7D6D5D4D3D2D1D0
INTSEL
VCC
RXD
RIDÔ
CDOÔ
CDA*
RIA*
RXA
GNDD7D6D5D4D3D2D1D0
VCC
RXD
RID*
CDD*
2728293031323334353637383940414243
987654321
68676665646362
61
Ei16C554
60
59
58
57
56
55
54
53
52
51
50
49
48
47
46
45
44
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
171819202122232425262728293031
32
646362616059585756555453525150
49
Ei16C554
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
64-PIN TQFP68-PIN PLCC
Part Numbers May Be Marked With "IMP" or "Ei."
For additional information, contact IMP, Inc. at 408.432.9100 or visit www.impweb.com
IMP, Inc. acquired Epic products on January 26, 2001. (see press release at http://www.impweb.com/PRESS/PR012601.htm)
Loading...