XR16L784IV-F Exar Corporation, XR16L784IV-F Datasheet - Page 23

• 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

REV. 1.2.3
TIMER [7:0] (default 0x00): Reserved.
TIMERMSB [7:0] and TIMERLSB [7:0]
TIMERMSB and TIMERLSB form a 16-bit value. The least-significant bit of the timer is being bit [0] of the
TIMERLSB with most-significant-bit being bit [7] in TIMERMSB. Reading the TIMERCNTL register will clear its
interrupt. Default value is zero upon powerup and reset.
Each bit selects 8X or 16X sampling rate for that UART channel, bit-0 is channel 0. Logic 0 (default) selects
normal 16X sampling with logic one selects 8X sampling rate. Transmit and receive data rates will double by
selecting 8X.
The 8-bit Reset register [RESET] provides the software with the ability to reset individual UART(s) when there
is a need. Each bit is self-resetting after it is written a logic 1 to perform a reset to that channel. All registers in
that channel will be reset to the default condition, see
UART channel 0 with bit-3=1 resets channel 3.
3.1.3
3.1.4
3.1.5
Bit-15
8XMODE [7:0] (default 0x00)
REGA [7:0] reserved
RESET [7:0] (default 0x00)
Bit-14
Bit-13
TIMERMSB Register
Bit-12
Bit-7 Bit-6 Bit-5 Bit-4 Bit-3 Bit-2
Rsvd
Bit-11
16-Bit Timer/Counter Programmable Registers
Bit-7 Bit-6 Bit-5 Bit-4 Bit-3 Bit-2 Bit-1 Bit-0
Rsvd
Bit-7 Bit-6 Bit-5 Bit-4 Bit-3 Bit-2 Bit-1 Bit-0
Individual UART Channel 8X Clock Mode Enable
Rsvd
(default 0x00)
Rsvd
Bit-10
Individual UART Channel Reset Enable
Rsvd
Rsvd
Rsvd
TIMERCNTL Register
Bit-9
Rsvd Rsvd Ch-3 Ch-2 Ch-1 Ch-0
Rsvd Rsvd Ch-3 Ch-2 Ch-1 Ch-0
8XMODE Register
RESET Register
Bit-8
Rsvd
23
Select
Clock
HIGH PERFORMANCE 2.97V TO 5.5V QUAD UART
Table 19
Bit-7
Re-trigger
Single/
Bit-6
for details. As an example, bit-0 =1 resets
Bit-1 Bit-0
Start/
Stop
Bit-5
TIMERLSB Register
Enable
Bit-4
INT
Bit-3
Bit-2
XR16L784
Bit-1
Bit-0