xr16m698 Exar Corporation, xr16m698 Datasheet - Page 8

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

XR16M698
1.62V TO 3.63V HIGH PERFORMANCE OCTAL UART WITH 32-BYTE FIFO
During a write cycle, the setting of the Device Configuration register REGB
override the channel selection of address A6:A4 and allow a simultaneous write to all 8 UART channels when
any channel is written to. This functional capability allow the registers in all 8 UART channels to be modified
concurrently, saving individual channel initialization time. Caution should be considered, however, when using
this capability. Any in-process serial data transfer may be disrupted by changing an active channel’s mode.
The INT# interrupt output changes according to the operating mode and enhanced features setup.
and 4
2.3
2.4
summarize the operating behavior for the transmitter and receiver.
Simultaneous Write to All Channels
INT# Ouput
Auto RS-485
Mode
YES
NO
HIGH = no data
LOW = 1 byte
HIGH = a byte in THR
LOW = THR empty
HIGH = a byte in THR
LOW = transmitter empty
(FIFO D
FCR B
(FIFO D
FCR B
T
ABLE
T
IT
ISABLED
ABLE
-0 = 0
IT
ISABLED
-0 = 0
3: INT# P
4: INT# P
)
)
IN
HIGH = FIFO above trigger level
LOW = FIFO below trigger level or FIFO empty
HIGH = FIFO above trigger level
LOW = FIFO below trigger level or transmitter empty
HIGH = FIFO below trigger level
LOW = FIFO above trigger level
IN
O
O
PERATION FOR
PERATION
8
(FIFO E
FCR B
F
OR
T
RANSMITTER
R
(FIFO E
FCR B
IT
NABLED
ECEIVER
-0 = 1
IT
NABLED
(See Table
)
-0 = 1
)
9) bit-0 to a logic 1 will
REV. 1.0.0
Table 3