ST16C1450CJ28 EXAR [Exar Corporation], ST16C1450CJ28 Datasheet - Page 31

• Manufacturer Part Number: ST16C1450CJ28
• Description: 2.97V TO 5.5V UART
• Manufacturer: EXAR [Exar Corporation]

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2.97V TO 5.5VUART
GENERAL DESCRIPTION................................................................................................. 1
PIN DESCRIPTIONS ......................................................................................................... 5
1.0 PRODUCT DESCRIPTION .................................................................................................................... 7
2.0 FUNCTIONAL DESCRIPTIONS ............................................................................................................ 7
3.0 UART INTERNAL REGISTERS ........................................................................................................... 13
4.0 INTERNAL REGISTER DESCRIPTIONS ............................................................................................ 15
ABSOLUTE MAXIMUM RATINGS .................................................................................. 22
ELECTRICAL CHARACTERISTICS................................................................................ 22
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F
A
ORDERING INFORMATION
T
DC E
AC E
TA=0
EATURES
YPICAL PACKAGE THERMAL RESISTANCE DATA
PPLICATIONS
DATA BUS INTERFACE ............................................................................................................................................. 5
MODEM OR SERIAL I/O INTERFACE ....................................................................................................................... 5
ANCILLARY SIGNALS ................................................................................................................................................ 6
2.1 INTERNAL REGISTERS ................................................................................................................................... 7
2.2 CRYSTAL OSCILLATOR OR EXTERNAL CLOCK ......................................................................................... 8
2.3 PROGRAMMABLE BAUD RATE GENERATOR ............................................................................................. 8
2.4 TRANSMITTER ................................................................................................................................................. 9
2.5 RECEIVER ...................................................................................................................................................... 10
2.6 SPECIAL (ENHANCED FEATURE) MODE ................................................................................................... 11
2.7
4.1 RECEIVE HOLDING REGISTER (RHR) - READ- ONLY ............................................................................... 15
4.2 TRANSMIT HOLDING REGISTER (THR) - WRITE-ONLY ............................................................................ 15
4.3 INTERRUPT ENABLE REGISTER (IER) - READ/WRITE ............................................................................. 15
4.4 INTERRUPT STATUS REGISTER (ISR) - READ-ONLY ............................................................................... 15
4.5 LINE CONTROL REGISTER (LCR) - READ/WRITE ..................................................................................... 16
4.6 MODEM CONTROL REGISTER (MCR) OR GENERAL PURPOSE OUTPUTS CONTROL - READ/WRITE 18
4.7 LINE STATUS REGISTER (LSR) - READ ONLY ........................................................................................... 19
4.8 MODEM STATUS REGISTER (MSR) - READ ONLY .................................................................................... 20
4.9 SCRATCH PAD REGISTER (SPR) - READ/WRITE ...................................................................................... 21
F
F
F
F
T
F
F
F
T
T
T
T
T
F
F
F
F
IGURE
IGURE
IGURE
IGURE
ABLE
IGURE
IGURE
IGURE
ABLE
ABLE
ABLE
ABLE
ABLE
IGURE
IGURE
IGURE
IGURE
LECTRICAL
LECTRICAL
O TO
2.4.1 TRANSMIT HOLDING REGISTER (THR) - WRITE ONLY........................................................................................... 9
2.4.2 TRANSMITTER OPERATION....................................................................................................................................... 9
2.5.1 RECEIVE HOLDING REGISTER (RHR) - READ-ONLY ............................................................................................ 10
2.6.1 SOFT RESET .............................................................................................................................................................. 11
2.6.2 POWER DOWN MODE ............................................................................................................................................... 11
4.4.1 INTERRUPT GENERATION: ...................................................................................................................................... 16
4.4.2 INTERRUPT CLEARING: ........................................................................................................................................... 16
INTERNAL LOOPBACK ................................................................................................................................ 11
1: T
2: ST16C145X UART INTERNAL REGISTERS ............................................................................................................... 13
3:
4: I
5: P
6: UART RESET CONDITIONS ........................................................................................................................................ 21
1. B
2. ST16C1450 P
3. ST16C1451 P
4. T
5. T
6. R
7. I
8. C
9. M
10. D
11. D
..................................................................................................................................................... 1
70
NTERRUPT
INTERNAL REGISTERS DESCRIPTION. S
YPICAL DATA RATES WITH A
ARITY SELECTION
NTERNAL
LOCK
YPICAL OSCILLATOR CONNECTIONS
RANSMITTER
O
ECEIVER
LOCK
ODEM
............................................................................................................................................... 1
ATA
ATA
C (-40
C
C
HARACTERISTICS
D
HARACTERISTICS
B
B
T
I
US
US
IAGRAM
IMING
NPUT
L
S
O
OOPBACK
O TO
OURCE AND
R
W
PERATION IN NON
EAD
/O
O
............................................................................................................................................................... 24
RITE
INOUTS
INOUTS
................................................................................................................................ 4
PERATION
UTPUT
............................................................................................................................................................. 1
.......................................................................................................................................................... 18
+85
T
T
IMING
IMING
..................................................................................................................................................... 12
..................................................................................................................................................... 2
..................................................................................................................................................... 3
O
T
P
IMING
C
RIORITY
.............................................................................................................................................. 25
............................................................................................................................................. 10
............................................................................................................................................ 25
14.7456 MH
.............................................................................................................. 22
.............................................................................................................. 23
FOR INDUSTRIAL GRADE PACKAGE
-FIFO M
TABLE OF CONTENTS
...................................................................................................................................... 24
L
EVEL
................................................................................................................................. 8
ODE
Z CRYSTAL OR EXTERNAL CLOCK
....................................................................................................................... 16
.................................................................................................................... 11
(
MARGIN OF ERROR
HADED BITS ARE ENABLED WHEN
I
: ± 15%) ................................................. 22
), V
........................................................................ 9
CC IS
EFR B
2.97V
IT
-4=1......................................... 14
TO
5.5V...................... 23
ST16C1450/51
REV. 4.2.0