XR16C872 Datasheet, PDF (47/60 Pages) Exar Corporation – DUAL UART WITH 1284 PARALLEL PORT AND PLUG-AND-PLAY CONTROLLER

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XR16C872
HOST INTERFACE AND UART AC Electrical Characteristics
T =0° - 70°C (-40° - +85°C for Industrial grade packages), Vcc=3.3 - 5.0 V ± 10% unless otherwise specified.
A
Symbol
T_1CW
T_2FQ
T3AS
T4AH
T_5RD
T_6DY
T_7DA
T_8DH
T_9WR
T_10DS
T_11DH
T_12D
T_13D
T_14D
T_15D
T_16D
T_17D
T_18D
T_19D
T_RST
N
Parameter
Clock pulse duration
Oscillator/Clock frequency
Limits
3.3
Min Max
20
tbd
Address setup time
10
Address hold time
10
IOR# strobe width
50
Read/Write cycle delay
50
Delay from IOR# to data
35
Data disable time
25
IOW# strobe width
40
Data setup time
20
Data hold time
50
Delay from IOW# to modem output
Delay from modem input to MSR interrupt
Delay from IOR# to reset MSR interrupt
Delay from stop bit to set RX interrupt
Delay from IOR# to reset interrupt
Delay from stop bit to set TX interrupt
Delay from INT reset to transmit start
8
Delay from IOW# to reset interrupt
Reset pulse width
40
Baud rate divisor
1
50
50
50
1
200
100
24
175
2¹⁶-1
Limits
5.0
Min Max
Units
20
ns
24 MHz
Conditions
5
ns
5
ns
25
ns
50
ns
25
ns
15
ns
40
ns
15
ns
35
ns
50 ns 100 pF load
35 ns 100 pF load
35 ns 100 pF load
1 Rclk
200 ns 100 pF load
100 ns
8
24 Rclk
175 ns
40
ns
1 2¹⁶-1 Rclk
Rev. 1.00
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