參數(shù)資料
型號(hào): XR16C872
廠商: Exar Corporation
英文描述: Dual UART with 1284 Parallel Port and Plug-and-Play(PnP) Controller(雙通用異步接收器/發(fā)送器(帶1284雙向并行端口和即插即用控制器))
中文描述: 雙UART)與1284并行端口,插頭插即用(PnP)功能控制器(雙通用異步接收器/發(fā)送器(帶1284雙向并行端口和即插即用控制器)
文件頁數(shù): 10/60頁
文件大小: 314K
代理商: XR16C872
XR16C872
10
Rev. P1.00
Preliminary
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.
Symbol
Parameter
Limits
3.3
Min
Limits
5.0
Min
Units
Conditions
Max
Max
T
1CW
T
2FQ
Clock pulse duration
Oscillator/Clock frequency
20
20
ns
MHz
tbd
24
T
3AS
T
4AH
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
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
10
10
50
50
35
25
40
20
50
5
5
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
Rclk
ns
ns
Rclk
ns
ns
Rclk
25
50
25
15
40
15
35
50
50
50
1
200
100
24
175
50
35
35
1
200
100
24
175
100 pF load
100 pF load
100 pF load
100 pF load
8
8
40
1
40
1
2
16
-1
2
16
-1
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