XR16L784IV-F Exar Corporation, XR16L784IV-F Datasheet - Page 22

• Manufacturer Part Number: XR16L784IV-F
• Description: IC UART 8B 3.3V QUAD 64LQFP
• Manufacturer: Exar Corporation
• Type: IrDA or RS- 485r

Specifications of XR16L784IV-F

• Number Of Channels: 4, QUART
• Package / Case: 64-LQFP
• Features: *
• Fifo's: 64 Byte
• Protocol: RS485
• Voltage - Supply: 2.97 V ~ 5.5 V
• With Auto Flow Control: Yes
• With Irda Encoder/decoder: Yes
• With False Start Bit Detection: Yes
• With Modem Control: Yes
• Mounting Type: Surface Mount
• Data Rate: 6.25 Mbps
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 2.97 V
• Supply Current: 5 mA
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Operating Supply Voltage: 3.3 V or 5 V
• No. Of Channels: 4
• Uart Features: Tx/Rx FIFO Counters
• Supply Voltage Range: 2.97V To 5.5V
• Operating Temperature Range: -40°C To +85°C
• Digital Ic Case Style: LQFP
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: 1016-1282

XR16L784
HIGH PERFORMANCE 2.97V TO 5.5V QUAD UART
A 16-bit down-count timer for general purpose timer or counter. Its clock source may be selected from internal
crystal oscillator or externally on pin TMRCK. The timer can be set to be a single-shot for a one-time event or
re-triggerable for a periodic event. An interrupt may be generated in the INT Register when the timer times out.
It is controlled through 4 configuration registers [TIMERCNTL, TIMER, TIMELSB, TIMERMSB]. These
registers provide start/stop and re-triggerable or one-shot operation. The time-out output of the Timer can be
set to generate an interrupt for system or event alarm.
TIMERCNTL [0]
TIMERCNLT [1]
TIMERCNTL [2]
TIMERCNTL [3]
TIMERCNTL [7:4]
3.1.2
P
RIORITY
x
1
2
3
4
5
6
7
F
IGURE
TIMERCNTL [3]
TIMERCNTL [1]
TIMERCNTL [2]
TIMERCNTL [0]
0
TIMERMSB and TIMERLSB
General Purpose 16-bit Timer/Counter. [TIMERMSB, TIMELSB, TIMER, TIMECNTL] (
OSC. CLOCK
B
X
0
0
0
0
1
1
1
1
IT
XX-XX-00-00)
15. T
2 B
TMRCK
T
(16-bit Value)
0
0
1
1
0
0
1
1
IT
ABLE
Logic 0 (default) disables Timer-Counter interrupt and logic one enables the interrupt, reading the
TIMERCNTL clears the interrupt.
Logic 0 (default) stops/pauses the timer and logic one starts/re-starts the timer/counter.
Logic0 (default) selects re-trigger timer function and logic one selects one-shot (timer function.
Logic 0 (default) selects internal and logic one selects external clock to the timer/counter.
Reserved (defaults to zero).
1 B
IMER
0
1
0
1
0
1
0
1
IT
/C
9: UART C
0
Timer Interrupt Enable
Start/Stop
Single/Re-triggerable
OUNTER CIRCUIT
Clock
Select
None
RXRDY & RX Line Status (logic OR of LSR[4:1]). RXRDY INT clears by reading data in the
RX FIFO until it falls below the trigger level; RX Line Status INT cleared after reading LSR
register.
RXRDY Time-out: Cleared when the FIFO becomes empty.
TXRDY, THR or TSR (auto RS485 mode) empty, clears after reading ISR register.
MSR, RTS/CTS or DTR/DSR delta or Xoff/Xon or special character detected. The first two
clear after reading MSR register; Xoff/Xon or special char. detect INT clears after reading
ISR register.
Reserved.
Reserved.
TIMER Time-out, shows up as a channel 0 INT. It clears after reading the TIMERCNTL regis-
ter. Reserved in other channels.
1
0
HANNEL
T
ABLE
.
Timer/Counter
10: TIMER CONTROL R
[3:0] I
16-Bit
NTERRUPT
Re-trigger
I
NTERRUPT
22
0
1
Time-out
Single-shot
S
OURCE
S
OURCE
EGISTER
1
0
E
(
S
NCODING AND
)
AND
No Interrupt
Timer Interrupt, Ch-0 INT=7
C
LEARING
C
LEARING
REV. 1.2.3
DEFAULT