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XR16L788CQ Datasheet(PDF) 6 Page - Exar Corporation |
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XR16L788CQ Datasheet(HTML) 6 Page - Exar Corporation |
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6 / 54 page  XR16L788 xr HIGH PERFORMANCE 2.97V TO 5.5V OCTAL UART REV. 1.2.2 6 NOTE: Pin type: I=Input, O=Output, IO= Input/output, OD=Output Open Drain. RX7 31 I UART channel 7 Receive Data or infrared receive data. Normal RXD input idles HIGH. The infrared pulses can be inverted internally prior the decoder by FCTR[4]. RTS7# 36 O UART channel 7 Request to Send or general purpose output (active low). See description of RTS0# pin. CTS7# 32 I UART channel 7 Clear to Send or general purpose input (active low). See description of CTS0# pin. DTR7# 37 O UART channel 7 Data Terminal Ready or general purpose output (active low). See description of DTR0# pin. DSR7# 33 I UART channel 7 Data Set Ready or general purpose input (active low). See description of DSR0# pin. CD7# 34 I UART channel 7 Carrier Detect or general purpose input (active low). RI7# 35 I UART channel 7 Ring Indicator or general purpose input (active low). ANCILLARY SIGNALS XTAL1 82 I Crystal or external clock input. Caution: this input is not 5V tolerant. XTAL2 81 O Crystal or buffered clock output. TMRCK 14 I 16-bit timer/counter external clock input. ENIR 15 I Infrared mode enable (active high). This pin is sampled during power up, fol- lowing a hardware reset (RST#) or soft-reset (register RESET). It can be used to start up all 8 UARTs in the infrared mode. The sampled logic state is transferred to MCR bit-6 in the UART. RST# 1 I Reset (active low). The configuration and UART registers are reset to default values, see Table 19. 16/68# 2 I Intel or Motorola data bus interface select. The Intel bus interface is selected when this input is HIGH and the Motorola bus interface is selected when this input is LOW. This input affects the functionality of IOR#, IOW# and CS# pins. VCC 3,17,28,48,84 +2.97V to 5.5V supply with 5V tolerant inputs (except XTAL1). GND 4,18,29,47,83 Power supply common, ground. NAME PIN #TYPE DESCRIPTION |
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