XR16M2752IJ44 EXAR [Exar Corporation], XR16M2752IJ44 Datasheet - Page 9
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XR16M2752IJ44
Manufacturer Part Number
XR16M2752IJ44
Description
HIGH PERFORMANCE DUART WITH 64-BYTE FIFO
Manufacturer
EXAR [Exar Corporation]
Datasheet
1.XR16M2752IJ44.pdf
(52 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
XR16M2752IJ44-F
Manufacturer:
Exar Corporation
Quantity:
10 000
REV. P1.0.0
The INTA and INTB interrupt output changes according to the operating mode and enhanced features setup.
Table 3 and 4
through
The M2752 includes an on-chip oscillator (XTAL1 and XTAL2) to produce a clock for both UART sections in the
device. The CPU data bus does not require this clock for bus operation. The crystal oscillator provides a
system clock to the Baud Rate Generators (BRG) section found in each of the UART. XTAL1 is the input to the
oscillator or external clock buffer input with XTAL2 pin being the output. For programming details, see
““Section 2.9, Programmable Baud Rate Generator with Fractional Divisor” on page
2.7
2.8
INTA/B Pin
INTA/B Pin
INTA/B Pin
INTA and INTB Outputs
Crystal Oscillator or External Clock Input
22.
summarize the operating behavior for the transmitter and receiver. Also see
Auto RS485
LOW = no data
HIGH = 1 byte
Mode
YES
NO
(FIFO D
T
FCR B
ABLE
T
ABLE
LOW = a byte in THR
HIGH = THR empty
LOW = a byte in THR
HIGH = transmitter empty
IT
ISABLED
F
3: INTA
-0 = 0
IGURE
4: INTA
(FIFO D
FCR B
)
4. T
AND
AND
22-47 pF
IT
ISABLED
YPICAL OSCILLATOR CONNECTIONS
XTAL1
INTB P
-0 = 0
C1
LOW = FIFO below trigger level
HIGH = FIFO above trigger level
INTB P
500 ΚΩ − 1 ΜΩ
)
INS
R2
IN
22-47 pF
9
HIGH PERFORMANCE DUART WITH 64-BYTE FIFO
XTAL2
O
C2
O
Y1
PERATION FOR
LOW = FIFO above trigger level
HIGH = FIFO below trigger level or FIFO empty
LOW = FIFO above trigger level
HIGH = FIFO below trigger level or transmitter empty
PERATION
1.8432 MHz
(Optional)
0-120 Ω
24 MHz
R1
to
F
FCR B
OR
(FIFO E
FCR B
T
RANSMITTER
R
ECEIVER
IT
-0 = 1 (FIFO E
IT
NABLED
-0 = 1
)
10.”
NABLED
XR16M2752
)
Figures 17