xr17c152im Exar Corporation, xr17c152im Datasheet - Page 60

• Manufacturer Part Number: xr17c152im
• Description: 5v Pci Bus Dual Uart
• Manufacturer: Exar Corporation

XR17C152
5V PCI BUS DUAL UART
REV. 1.2.0
GENERAL DESCRIPTION .................................................................................................1
PIN DESCRIPTIONS .........................................................................................................3
FUNCTIONAL DESCRIPTION ...........................................................................................6
1.0 XR17C152 Registers ............................................................................................................... 7
00)
2.0 Crystal Oscillator / Buffer .................................................................................................... 20
3.0 Transmit and Receive Data .................................................................................................. 21
RHR IN 8-BIT FORMAT 24
4.0 UART ...................................................................................................................................... 24
F
F
F
T
T
T
T
F
T
T
F
T
F
F
F
T
F
T
IGURE
IGURE
IGURE
ABLE
ABLE
ABLE
ABLE
IGURE
ABLE
ABLE
IGURE
ABLE
IGURE
IGURE
IGURE
ABLE
IGURE
ABLE
A
F
ORDERING INFORMATION
1.1 PCI LOCAL BUS CONFIGURATION SPACE REGISTERS ............................................................. 8
1.2 D
3.1 DATA LOADING AND UNLOADING VIA 32-BIT PCI BURST TRANSFERS ................................. 21
3.2 FIFO DATA LOADING AND UNLOADING THROUGH THE UART CHANNEL REGISTERS, THR AND
4.1 P
4.2 T
PPLICATIONS
EATURES
1: PCI L
2: XR17C152 D
3: D
4: D
5: UART C
6: UART C
7: TIMER CONTROL R
8: T
9: T
PCI Local Bus Interface........................................................................................................................................ 6
PCI Local Bus Configuration Space Registers..................................................................................................... 6
EEPROM Interface ............................................................................................................................................... 6
1.2.1 The Interrupt Status Register ................................................................................................................... 12
1.2.2 General Purpose 16-bit Timer/Counter [TIMERMSB, TIMELSB, TIMER, TIMECNTL] (default 0xXX-XX-00-
1.2.3 8XMODE [7:0] (default 0x00) ................................................................................................................... 15
1.2.4 REGA [15:8] Reserved ............................................................................................................................. 15
1.2.5 RESET [23:16] - (default 0x00) ................................................................................................................ 15
1.2.6 SLEEP [31:24] - (default 0x00)................................................................................................................. 16
1.2.7 Device Identification and Revision............................................................................................................ 16
1.2.9 Multi-Purpose Inputs and Outputs ............................................................................................................ 17
1.2.10 MPIO REGISTER ................................................................................................................................... 17
1.2.8 REGB Register ......................................................................................................................................... 17
3.1.1 Normal Rx FIFO Data Unloading at locations 0x100 (channel 0) and 0x300 (channel 1)....................... 21
3.1.2 Special Rx FIFO Data Unloading at locations 0x180 (channel 0) and 0x380 (channel 1) ...................... 22
3.1.3 Tx FIFO Data Loading at locations 0x100 (channel 0) and 0x300 (channel 1) ....................................... 22
4.2.1 Transmit Holding Register (THR) - Write-Only ......................................................................................... 25
4.2.2 Transmitter Operation in non-FIFO mode ................................................................................................ 25
4.2.3 Transmitter Operation in FIFO mode........................................................................................................ 26
4.2.4 Auto RS485 Operation ............................................................................................................................. 26
1. B
2. P
3. T
4. T
14
5. T
6. M
7. T
8. E
9. B
RANSMITTER
ROGRAMMABLE
EVICE CONFIGURATION
RANSMIT AND
YPICAL DATA RATES WITH A
EVICE
EVICE
LOCK
IN
HE
HE
IMER
YPICAL OSCILLATOR CONNECTIONS
XTERNAL
AUD
ULTIPURPOSE INPUT
O
...................................................................................................................................................1
XR17C152 R
OCAL
G
UT OF THE
/C
R
LOBAL
C
C
D
HANNEL
HANNEL
ATE
ONFIGURATION
ONFIGURATION
OUNTER CIRCUIT
IAGRAM
.............................................................................................................................................1
B
C
US
G
LOCK
EVICE
I
NTERRUPT
R
ENERATOR
.................................................................................................................................... 25
C
ECEIVE
[1:0] I
[1:0] I
..................................................................................................................................................................... 1
D
ONFIGURATION
B
EVICE
C
EGISTER
C
AUD
ONNECTION FOR
ONFIGURATION
EGISTERS
/
..............................................................................................................................2
NTERRUPT
NTERRUPT
OUTPUT INTERNAL CIRCUIT
D
R
R
......................................................................................................................................................... 2
....................................................................................................................................................... 24
. ..................................................................................................................................................... 14
R
ATA
EGISTERS SHOWN IN
EGISTERS SHOWN IN
R
EGISTER
R
S
ATE
14.7456 MH
EGISTER
ETS
R
.............................................................................................................................................. 14
EGISTER IN
S
S
C
G
............................................................................................................................................ 7
PACE
OURCE
LEARING
, INT0, INT1, INT2
ENERATOR
TABLE OF CONTENTS
R
...................................................................................................................................... 20
E
EGISTERS
XTENDED
R
S
Z CRYSTAL OR EXTERNAL CLOCK AT
EGISTERS
E
ET
B
:.......................................................................................................................... 13
NCODING
YTE FORMAT
BYTE
DWORD
............................................................................................... 9
.................................................................................................................... 10
D
.................................................................................................................. 18
ATA
......................................................................................... 24
................................................................................................................ 8
ALIGNMENT
............................................................................................................ 13
R
AND
ATE
ALIGNMENT
, 16C550
I
INT3.......................................................................................... 13
................................................................................................. 20
........................................................................................... 10
COMPATIBLE
...................................................................................... 11
16X S
.................................................................... 24
AMPLING
................................................. 25
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