xr16m698 Exar Corporation, xr16m698 Datasheet - Page 7

• Manufacturer Part Number: xr16m698
• Description: 1.62v To 3.63v High Performance Octal Uart With 32-byte Fifo
• Manufacturer: Exar Corporation

REV. 1.0.0
The XR16M698 (698) integrates the functions of 8 enhanced 16550 UARTs, a general purpose 16-bit timer/
counter and an on-chip oscillator. The device configuration registers include a set of four consecutive interrupt
source registers that provides interrupt-status for all 8 UARTs, timer/counter and a sleep wake up indicator.
Each UART channel has its own 16550 UART compatible configuration register set for individual channel
control, status, and data transfer. Additionally, each UART channel has 32-byte of transmit and receive FIFOs,
automatic RTS/CTS or DTR/DSR hardware flow control with hysteresis control, automatic Xon/Xoff and special
character software flow control, programmable transmit and receive FIFO trigger levels, infrared encoder and
decoder (IrDA ver. 1.0), programmable baud rate generator with a prescaler of divide by 1 or 4, and data rate
up to 15Mbps. The XR16M598 is a 1.62V-3.63V device.
The RST# input resets the internal registers and the serial interface outputs in all 8 channels to their default
state (see
in the device.
The internal registers of each UART can be reset by writing to the RESET register in the Device Configuration
Registers. For more details, see the RESET register description on
A LOW on the chip select pin, CS#, allows the user to select one of the UART channels to configure, send
transmit data and/or unload receive data to/from the UART. When address line A7 = 0, address lines A6:A4
are used to select one of the eight channels. See
1.0 DESCRIPTION
2.0 FUNCTIONAL DESCRIPTIONS
2.1
2.2
2.1.1
2.1.2
Device Reset
UART Channel Selection
Hardware Reset
Table
Software Reset
19). A LOW pulse of longer than 40 ns duration will be required to activate the reset function
V
A7
0
0
0
0
0
0
0
0
OLTAGE
3.3V
2.5V
1.8V
1.62V TO 3.63V HIGH PERFORMANCE OCTAL UART WITH 32-BYTE FIFO
A6
0
0
0
0
1
1
1
1
T
ABLE
16X S
0.9375 Mbps
A5
T
3.75 Mbps
2.5 Mbps
0
0
1
1
0
0
1
1
ABLE
2: UART C
R
AMPLING
ATE
1: M
A4
Table 2
0
1
0
1
0
1
0
1
AX
7
HANNEL
D
ATA
8X S
1.875 Mbps
below for UART channel selection.
7.5 Mbps
5 Mbps
R
R
AMPLING
Channel 0 Selected
Channel 1 Selected
Channel 2 Selected
Channel 3 Selected
Channel 4 Selected
Channel 5 Selected
Channel 6 Selected
Channel 7 Selected
S
ATE
ATES
ELECTION
F
page
UNCTION
30.
4X S
3.75 Mbps
15 Mbps
10 Mbps
R
AMPLING
ATE
XR16M698