參數(shù)資料
型號: XR16L788
廠商: Exar Corporation
英文描述: HIGH PERFORMANCE OCTAL UART
中文描述: 高性能八進制的UART
文件頁數(shù): 6/42頁
文件大?。?/td> 557K
代理商: XR16L788
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XR16L788 OCTAL UART
REV. 1.1.4
6
N
OTE
:
Pin type: I=Input, O=Output, IO= Input/output, OD=Output Open Drain.
DSR7#
33
I
UART channel 7 Data Set Ready or general purpose input (active low). See
description of DSR0# pin.
UART channel 7 Carrier Detect or general purpose input (active low).
UART channel 7 Ring Indicator or general purpose input (active low).
CD7#
RI7#
34
35
I
I
ANCILLARY SIGNALS
XTAL1
XTAL2
TMRCK
ENIR
82
81
14
15
I
Crystal or external clock input.
Crystal or buffered clock output.
16-bit timer/counter external clock input.
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 trans-
ferred to MCR bit-6 in the UART.
O
I
I
RST#
1
I
Reset (active low). The configuration and UART registers are reset to default
values, see Table-18.
Intel or Motorola data bus interface select. Logic one selects Intel bus inter-
face and logic zero selects Motorola interface. This input affects the function-
ality of IOR#, IOW# and CS# pins.
+3.3V supply with 5V tolerant inputs.
Power supply common, ground.
16/68#
2
I
VCC
GND
3,17,28,48,84
4,18,29,47,83,
N
AME
P
IN
#
T
YPE
D
ESCRIPTION
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