xr16c872iq Exar Corporation, xr16c872iq Datasheet - Page 47

• Manufacturer Part Number: xr16c872iq
• Description: Dual Uart With 1284 Parallel Port And Plug-and-play Controller
• Manufacturer: Exar Corporation

HOST INTERFACE AND UART AC Electrical Characteristics
T
A
Symbol
=0° - 70°C (-40° - +85°C for Industrial grade packages), Vcc=3.3 - 5.0 V ± 10% unless otherwise specified.
Rev. 1.00
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
N
1CW
2FQ
3AS
4AH
5RD
7DA
8DH
9WR
10DS
11DH
12D
13D
14D
15D
16D
17D
18D
19D
RST
6DY
Clock pulse duration
Oscillator/Clock frequency
Address setup time
Address hold time
IOR# strobe width
Read/Write cycle delay
Delay from IOR# to data
Data disable time
IOW# strobe width
Data setup time
Data hold time
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
Delay from IOW# to reset interrupt
Reset pulse width
Baud rate divisor
Parameter
DISCONTINUED
47
Min
20
10
10
50
50
35
25
40
20
50
40
1
8
Limits
3.3
2
Max
200
100
175
tbd
50
50
50
24
16
1
-1
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Min
25
40
20
25
50
15
15
35
40
5
5
8
1
Limits
5.0
2
Max
200
100
175
24
50
35
35
24
16
1
-1
XR16C872
Units
MHz
Rclk
Rclk
Rclk
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
100 pF load
100 pF load
100 pF load
100 pF load
Conditions