參數(shù)資料
型號(hào): XPC862
廠商: Motorola, Inc.
英文描述: Hardware Specifications
中文描述: 硬件規(guī)格
文件頁(yè)數(shù): 58/88頁(yè)
文件大?。?/td> 483K
代理商: XPC862
58
MPC862/857T/857DSL Hardware Specifications
For More Information On This Product,
Go to: www.freescale.com
MOTOROLA
CPM Electrical Characteristics
11.7
SCC in NMSI Mode Electrical Specifications
Table 20 provides the NMSI external clock timing.
Table 21 provides the NMSI internal clock timing.
Table 20. NMSI External Clock Timing
Num
Characteristic
All Frequencies
Unit
Min
Max
100
RCLK1 and TCLK1 width high
1
1
The ratios SyncCLK/RCLK1 and SyncCLK/TCLK1 must be greater than or equal to 2.25/1.
2
Also applies to CD and CTS hold time when they are used as an external sync signal.
1/SYNCCLK
ns
101
RCLK1 and TCLK1 width low
1/SYNCCLK +5
ns
102
RCLK1 and TCLK1 rise/fall time
15.00
ns
103
TXD1 active delay (from TCLK1 falling edge)
0.00
50.00
ns
104
RTS1 active/inactive delay (from TCLK1 falling edge)
0.00
50.00
ns
105
CTS1 setup time to TCLK1 rising edge
5.00
ns
106
RXD1 setup time to RCLK1 rising edge
5.00
ns
107
RXD1 hold time from RCLK1 rising edge
2
5.00
ns
108
CD1 setup Time to RCLK1 rising edge
5.00
ns
Table 21. NMSI Internal Clock Timing
Num
Characteristic
All Frequencies
Unit
Min
Max
100
RCLK1 and TCLK1 frequency
1
1
The ratios SyncCLK/RCLK1 and SyncCLK/TCLK1 must be greater or equal to 3/1.
2
Also applies to CD and CTS hold time when they are used as an external sync signals.
0.00
SYNCCLK/3
MHz
102
RCLK1 and TCLK1 rise/fall time
ns
103
TXD1 active delay (from TCLK1 falling edge)
0.00
30.00
ns
104
RTS1 active/inactive delay (from TCLK1 falling edge)
0.00
30.00
ns
105
CTS1 setup time to TCLK1 rising edge
40.00
ns
106
RXD1 setup time to RCLK1 rising edge
40.00
ns
107
RXD1 hold time from RCLK1 rising edge
2
0.00
ns
108
CD1 setup time to RCLK1 rising edge
40.00
ns
F
Freescale Semiconductor, Inc.
n
.
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