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XR16V554 Datasheet(PDF) 6 Page - Exar Corporation |
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XR16V554 Datasheet(HTML) 6 Page - Exar Corporation |
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6 / 45 page  XR16V554/554D 6 2.25V TO 3.6V QUAD UART WITH 16-BYTE FIFO REV. 1.0.2 INTSEL 38 - 65 6 I Interrupt Select (active high, input with internal pull- down). When 16/68# pin is HIGH for Intel bus interface, this pin can be used in conjunction with MCR bit-3 to enable or disable the INT A-D pins or override MCR bit-3 and enable the interrupt outputs. Interrupt outputs are enabled continuously when this pin is HIGH. MCR bit-3 enables and disables the interrupt output pins. In this mode, MCR bit-3 is set to a logic 1 to enable the contin- uous output. See MCR bit-3 description for full detail. This pin must be LOW in the Motorola bus interface mode. For the 64 pin packages, this pin is bonded to VCC internally in the XR16V554D so the INT outputs operate in the continuous interrupt mode. This pin is bonded to GND internally in the XR16V554 and there- fore requires setting MCR bit-3 for enabling the inter- rupt output pins. MODEM OR SERIAL I/O INTERFACE TXA TXB TXC TXD 6 8 28 30 8 10 39 41 17 19 51 53 29 32 69 72 O UART channels A-D Transmit Data and infrared trans- mit data. In this mode, the TX signal will be HIGH dur- ing reset, or idle (no data). RXA RXB RXC RXD 48 13 22 36 62 20 29 51 7 29 41 63 17 44 57 4 I UART channel A-D Receive Data. Normal receive data input must idle HIGH. RTSA# RTSB# RTSC# RTSD# 3 11 25 33 5 13 36 44 14 22 48 56 26 35 66 75 O UART channels A-D Request-to-Send (active low) or general purpose output. If these outputs are not used, leave them unconnected. CTSA# CTSB# CTSC# CTSD# 1 12 23 35 2 16 33 47 11 25 45 59 23 38 63 78 I UART channels A-D Clear-to-Send (active low) or gen- eral purpose input. These inputs should be connected to VCC when not used. DTRA# DTRB# DTRC# DTRD# - - - - 3 15 34 46 12 24 46 58 24 37 64 77 O UART channels A-D Data-Terminal-Ready (active low) or general purpose output. If these outputs are not used, leave them unconnected. DSRA# DSRB# DSRC# DSRD# - - - - 1 17 32 48 10 26 44 60 22 39 62 79 I UART channels A-D Data-Set-Ready (active low) or general purpose input. This input should be connected to VCC when not used. This input has no effect on the UART. Pin Description NAME 48-QFN PIN # 64-LQFP PIN # 68-PLCC PIN# 80-LQFP PIN # TYPE DESCRIPTION |
Similar Part No. - XR16V554_07 |
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Similar Description - XR16V554_07 |
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