參數(shù)資料
型號(hào): MPC880VR80
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: 32-BIT, 80 MHz, RISC PROCESSOR, PBGA357
封裝: LEAD FREE, PLASTIC, BGA-357
文件頁(yè)數(shù): 55/87頁(yè)
文件大?。?/td> 1046K
代理商: MPC880VR80
MPC885/MPC880 PowerQUICC Hardware Specifications, Rev. 7
Freescale Semiconductor
59
CPM Electrical Characteristics
12.7
SCC in NMSI Mode Electrical Specifications
Table 22 provides the NMSI external clock timing.
Table 23 provides the NMSI internal clock timing.
Table 22. NMSI External Clock Timing
Num
Characteristic
All Frequencies
Unit
Min
Max
100
RCLK1 and TCLK1 width high1
1 The ratios SyncCLK/RCLK1 and SyncCLK/TCLK1 must be greater than or equal to 2.25/1.
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 edge2
2 Also applies to CD and CTS hold time when they are used as external sync signals.
5.00
ns
108
CD1 setup time to RCLK1 rising edge
5.00
ns
Table 23. NMSI Internal Clock Timing
Num
Characteristic
All Frequencies
Unit
Min
Max
100
RCLK1 and TCLK1 frequency1
1 The ratios SyncCLK/RCLK1 and SyncCLK/TCLK1 must be greater than or equal to 3/1.
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 edge2
2 Also applies to CD and CTS hold time when they are used as external sync signals
0.00
ns
108
CD1 setup time to RCLK1 rising edge
40.00
ns
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