XR16L788IQ-F Exar Corporation, XR16L788IQ-F Datasheet - Page 25

• Manufacturer Part Number: XR16L788IQ-F
• Description: IC UART 64B 3.3V OCTAL 100QFP
• Manufacturer: Exar Corporation
• Type: IrDA or RS- 485r

Specifications of XR16L788IQ-F

• Number Of Channels: 8
• Package / Case: 100-BQFP
• 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: 8
• 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: QFP
• 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: 1016-1284

REV. 1.2.3
The 8-bit RESET register provides the software with the ability to reset the 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
channel 0 with bit-7=1 resets channel 7.
The 8-bit Sleep register enables each UART separately to enter Sleep mode. Sleep mode reduces power
consumption when the system needs to put the UART(s) to idle. The UART enters sleep mode when there is
no interrupt pending. When all 8 UARTs are put to sleep, the on-chip oscillator shuts off to further conserve
power. In this case, the octal UART is awaken by any of the UART channel on from a receive data byte or a
change on the serial port. The UART is ready after 32 crystal clocks to ensure full functionality. Also, a special
interrupt is generated with an indication of no pending interrupt. Logic 0 (default) and logic 1 disable and
enable sleep mode respectively.
There are 2 internal registers that provide device identification and revision, DVID and DREV registers. The 8-
bit content in the DVID register provides device identification. A return value of 0x28 from this register indicates
the device is a XR16L788. The DREV register returns a 8-bit value of 0x01 for revision A, 0x02 for revision B
and so on. This information is very useful to the software driver for identifying which device it is communicating
with and to keep up with revision changes.
Device identification for the type of UART. The upper nibble indicates it is a XR16L78x series with lower nibble
indicating the number of channels.
Examples:
XR16L788 = 0x28
XR16L784 = 0x24
Revision number of the XR16L788. A 0x01 represents "revision-A" with 0x02 for rev-B and so forth.
3.1.5
3.1.6
3.1.7
3.1.7.1
3.1.7.2
RESET [7:0] (default 0x00)
SLEEP [7:0] (default 0x00)
Device Identification and Revision
DVID [7:0] (default 0x28)
DREV [7:0] (default (0x01)
Bit-7 Bit-6 Bit-5 Bit-4 Bit-3 Bit-2 Bit-1 Bit-0
Ch-7
Ch-7
Bit-7 Bit-6 Bit-5 Bit-4 Bit-3 Bit-2 Bit-1 Bit-0
Individual UART Channel Sleep Enable
Individual UART Channel Reset Enable
Ch-6
Ch-6
Ch-5 Ch-4 Ch-3 Ch-2 Ch-1 Ch-0
Ch-5 Ch-4 Ch-3 Ch-2 Ch-1 Ch-0
RESET Register
SLEEP Register
Table 19
25
HIGH PERFORMANCE 2.97V TO 5.5V OCTAL UART
for details. As an example, bit-0 =1 resets UART
XR16L788