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PDF NM9835 Data sheet ( Hoja de datos )
| Número de pieza | NM9835 | |
| Descripción | PCI + Dual UART and 1284 Printer Port | |
| Fabricantes | ETC | |
| Logotipo |  |
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NetMos
Technology
Nm9835
PCI + Dual UART and 1284 Printer Port
Features
• Single 5-V Operation
• Low Power
• PCI compatible Dual UART
• Pin-to-Pin compatible to Nm9735
• 16 byte transmit-receive FIFO (UART)
• Selectable receive trigger levels
• Programmable baud rate generator
• Modem control signals
• 5, 6, 7, 8 Bit characters selection
• Even, Odd, No parity, or Force parity generations
• Status report capability
• Compatible with 16C550
• Multi-mode compatible controller (SPP, PS2, EPP,
ECP)
• Fast data rates up to 1.5 Mbytes/s (parallel port)
• Fast data rates up to 1 Mbytes/s (serial ports)
• On chip oscillator
• Re-map function for legacy ports
• 16 Byte FIFO (parallel)
• Microsoft Compatible
• Software programmable mode selects
• 128-pin VQFP package
Applications
• Printer server
• Portable backup units
• Printer interface
• Embedded applications
• High speed modems
• Monitoring equipment
• Add on I/O cards
• Serial networking
General Description
Ordering Information
The Nm9835 is a PCI based dual-channel high perfor-
mance UART with Enhanced bi-directional parallel con-
troller. The Nm9835 offers 16 byte transmit and receive
FIFO for each UART channel and 16 byte FIFO for
printer channel. The Nm9835 perform serial-to-parallel
conversions on data received from a peripheral device,
and parallel-to-serial conversion on data received from
its CPU. In addition Nm9835 fully supports the existing
Centronics printer interface as well as PS/2, EPP, and
ECP modes.
Commercial Grade
Nm9835CV 128-VQFP 0° C to +70° C
Industrial Grade
Nm9835EV 128-VQFP -40° C to +85° C
The Nm9835 is ideally suited for PC applications, such
as high speed COM ports and parallel port. The Nm9835
is available in 128-Pin QFP package, It is fabricated in
an advanced in submicron CMOS process to achieve
low drain power and high speed requirements.
Rev. 1.0
Page 1-51
1 page  
NetMos
Technology
Nm9835
PCI + Dual UART and 1284 Printer Port
Pin Name 128
XTAL2
12XCLK
61
58
6XCLK
56
3XCLK
55
ACLK
59
BCLK
57
TXA
nRTSA
105
107
nDTRA 106
RXA
nCTSA
109
111
nDSRA
nCDA
110
112
Type
O
O
O
O
I
I
O
O
O
I
I
I
I
Description
input is used in conjunction with XTAL2 to form a feedback circuit for the
internal timing. Two external capacitors (10pF) connected from each side of
the XTAL1 and XTAL2 to GND is required to form a crystal oscillator circuit.
Crystal oscillator output. See XTAL1 description.
External clock or crystal oscillator clock divide by 12 output (1.8432 MHz
standard PC UART clock for 115.2k data rate).
External clock or crystal oscillator clock divide by 6 output (3.6864 MHz PC
UART clock for 230.4k data rate).
External clock or crystal oscillator clock divide by 3 output (7.3728 MHz UART
clock for 460.8k data rate).
UART-A clock input. ACLK should be connected to external clock source or
one of the 12XCLK, 6XCLK, 3XCLK output pins of the Nm9835.
UART-B clock input. BCLK should be connected to external clock source or
one of the 12XCLK, 6XCLK, 3XCLK output pins of the Nm9835.
UART-A Serial data output.
Active low, UART-A request-to-send signal. It is set to high (in active) after a
hardware reset or during internal loop-back mode. When low, this indicates
that Modem or data set is ready to establish a communication link. nRTSA
has no effect on the transmitter or receiver.
Active low, UART-A data-terminal-ready signal. It is set to high (in active)
after a hardware reset or during internal loop-back mode. When low, this
output indicates to the Modem or data set that the UART-A is ready to estab-
lish a communication link. nDTRA has no effect on the transmitter or re-
ceiver.
UART-A, Serial data input.
Active low, UART-A clear-to-send signal. When low this indicates that Mo-
dem or data set is ready to exchange data. nCTSA has no effect on the
transmitter.
Active low, UART-A data-set-ready signal.
Active low, UART-A Carrier-detect signal. When low this indicates that Mo-
dem or data set has detected the data carrier. nCDA has no effect on the
transmitter.
Rev. 1.0
Page 1-55
5 Page 
NetMos
Technology
Nm9835
PCI + Dual UART and 1284 Printer Port
Printer Registers Table
Ex A2 A1 A0 REGISTER D7 D6 D5 D4 D3 D2 D1 D0
E3 0 0 0
DPR
PD7 PD6 PD5 PD4 PD3 PD2 PD1 PD0
E3 0 0 1
DSR nBUSY nACK PE SLCT FAULT INT
state
“0” EPP
TIMEOUT
E3 0 1 0
DCR
“0” “0” DIR INTA nSLCTIN INIT nAUTOFD nSTROBE
E3 0 1 1
EPP
Address
ADD-7 ADD-6 ADD-5 ADD-4 ADD-3 ADD-2 ADD-1 ADD-0
E3 1 0 0
EPP
data
DAT-7 DAT-6 DAT-5 DAT-4 DAT-3 DAT-2 DAT-1 DAT-0
E3 1 0 1
EPP
data
DAT-15 DAT-14 DAT-13 DAT-12 DAT-11 DAT-10 DAT-9 DAT-8
E3 1 1 0
EPP
data
DAT-23 DAT-22 DAT-21 DAT-20 DAT-19 DAT-18 DAT-17 DAT-16
E3 1 1 1
EPP
data
DAT-31 DAT-30 DAT-29 DAT-28 DAT-27 DAT-26 DAT-25 DAT-24
E4 0 0 0 C-FIFO CDAT-7 CDAT-6 CDAT-5 CDAT-4 CDAT-3 CDAT-2 CDAT-1 CDAT-0
E4 0 0 0 CONF-A
“1”
“0”
“0”
“1”
“0”
“1”
“0”
“0”
E4 0 0 1 CONF-B
“0”
INT “0”
“0”
“0”
“0”
“0”
“0”
Pin
E4 0 1 0
ECR
MODE
select
ErrIntrEn
enable
“0”
Service
Int
FIFO
full
FIFO
empty
E3: Internal standard printer chip select
E4: Internal printer configuration register chip select
Rev. 1.0
Page 1-61
11 Page | ||
| Páginas | Total 23 Páginas | |
| PDF Descargar | [ Datasheet NM9835.PDF ] | |
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