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ST16C452IJ68PS Datasheet

  • ST16C452IJ68PS

  • DUAL UART WITH PARALLEL PRINTER PORT

  • 164.26KB

  • 30頁(yè)

  • EXAR   EXAR

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ST16C452
ST16C452PS
DUAL UART WITH PARALLEL
PRINTER PORT
March 2004
DESCRIPTION
The ST16C452/ST16C452PS (452/452PS) is a dual universal asynchronous receiver and transmitter (UART)
with an added bi-directional parallel port that is directly compatible with a CENTRONICS type printer. The parallel
port is designed such that the user can configure it as general purpose I/O interface, or for connection to other
printer devices. The 452/452PS provides enhanced UART functions, a modem control interface, and data rates
up to 1.5Mbps. Onboard status registers provide the user with error indications and operational status. The system
interrupts and control may be tailored to meet user requirements. An internal loop-back capability allows onboard
diagnostics. A programmable baud rate generator is provided to select transmit and receive clock rates from 50
bps to 1.5 Mbps. The 452/452PS is available in a 68 pin PLCC package. The 452/452PS is compatible with the
16C450. The 452 is available in two versions, the ST16C452 and the ST16C452PS. The ST16C452 provides
single hardware pin to control the printer port data direction while the 452PS provides an additionally software
control bit to control the printer port data direction to become compatible PS/2 operating system.
The 452/452PS is fabricated in an advanced CMOS process with low power consumption.
PLCC Package
FEATURES
ERROR
-DSRB
-BUSY
BIDEN
SLCT
-CDB
-CSB
GND
GND
VCC
ACK
RXB
62
N.C.
Added features in devices with top mark date code of
"F2 YYWW" and newer:
鈥?/div>
5V Tolerant Inputs
鈥?/div>
Pin to pin and functional compatible to TL16C452
鈥?/div>
2.97 to 5.5 volt operation
鈥?/div>
Software compatible with ST16C450, NS16C450
鈥?/div>
1.5 Mbps transmit/receive operation (24MHz)
鈥?/div>
Independent transmit and receive control
鈥?/div>
Modem and printer status registers
鈥?/div>
UART port and printer port Bi-directional
鈥?/div>
Printer port direction set by single control bit or 8 bit
pattern (AA/55)
鈥?/div>
Modem control signals (-CTS, -RTS, -DSR, -DTR,
-RI, -CD)
鈥?/div>
Programmable character lengths (5, 6, 7, 8)
鈥?/div>
Even, odd, or no parity bit generation and detection
鈥?/div>
Internal loop-back diagnostics
鈥?/div>
TTL compatible inputs, outputs
鈥?/div>
Low Power
68
67
66
65
64
63
61
60
59
58
57
56
55
54
9
8
7
6
5
4
3
2
TXB
-DTRB
-RTSB
-CTSB
D0
D1
D2
D3
D4
D5
D6
D7
N.C.
VCC
-RTSA
-DTRA
TXA
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
1
N.C.
-RIB
CLK
PE
INTB
INTP
-SLCTIN
INIT
-AUTOFDXT
-STROBE
GND
PD0
PD1
PD2
PD3
PD4
PD5
PD6
PD7
INTA
RDOUT
ST16C452CJ68
ST16C452CJ68PS
53
52
51
50
49
48
47
46
45
44
A2
A1
A0
-RESET
ORDERING INFORMATION
Part number
Package
Operating temperature
Device Status
ST16C452CJ68
ST16C452CJ68PS
ST16C452IJ68
ST16C452IJ68PS
68-Lead
68-Lead
68-Lead
68-Lead
PLCC
PLCC
PLCC
PLCC
0擄 C to + 70擄 C
0擄 C to + 70擄 C
-40擄 C to + 85擄 C
-40擄 C to + 85擄 C
Active
Active
Active
Active
Rev. 3.20
EXAR
Corporation, 48720 Kato Road, Fremont, CA 94538
鈥?/div>
(510) 668-7000
鈥?/div>
FAX (510) 668-7017
INTSEL
-CDA
-CSA
-CSP
GND
-IOW
-DSRA
-CTSA
-IOR
VCC
RXA
-RIA
N.C.

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