mpc850de Freescale Semiconductor, Inc, mpc850de Datasheet - Page 50

• Manufacturer Part Number: mpc850de
• Description: Mpc850 Rev. A/b/c Communications Controller
• Manufacturer: Freescale Semiconductor, Inc

SCC in NMSI Mode Electrical Specifications
8.6
Table 18 provides the NMSI external clock timing.
Table 19 provides the NMSI internal clock timing.
50
1
2
1
2
The ratios SyncCLK/RCLKx and SyncCLK/TCLKx must be greater than or equal to 2.25/1.
Also applies to CD and CTS hold time when they are used as an external sync signal.
Num
Num
100
102
103
104
105
106
107
108
100
101
102
103
104
105
106
107
108
The ratios SyncCLK/RCLKx and SyncCLK/TCLK1x must be greater or equal to 3/1.
Also applies to CD and CTS hold time when they are used as an external sync signals.
SCC in NMSI Mode Electrical Specifications
RCLKx and TCLKx frequency
RCLKx and TCLKx rise/fall time
TXDx active delay (from TCLKx falling edge)
RTSx active/inactive delay (from TCLKx falling edge)
CTSx setup time to TCLKx rising edge
RXDx setup time to RCLKx rising edge
RXDx hold time from RCLKx rising edge
CDx setup time to RCLKx rising edge
RCLKx and TCLKx frequency
table)
RCLKx and TCLKx width low
RCLKx and TCLKx rise/fall time
TXDx active delay (from TCLKx falling edge)
RTSx active/inactive delay (from TCLKx falling edge)
CTSx setup time to TCLKx rising edge
RXDx setup time to RCLKx rising edge
RXDx hold time from RCLKx rising edge
CDx setup time to RCLKx rising edge
MPC850 (Rev. A/B/C) Hardware Specifications
Table 18. NMSI External Clock Timing
Characteristic
Table 19. NMSI Internal Clock Timing
Characteristic
1
(x = 2, 3 for all specs in this table)
1
(x = 2, 3 for all specs in this
2
2
1/SYNCCLK +5
1/SYNCCLK
40.00
40.00
40.00
0.00
0.00
0.00
0.00
Min
—
All Frequencies
All Frequencies
0.00
0.00
5.00
5.00
5.00
5.00
Min
—
SYNCCLK/3
30.00
30.00
Max
—
—
—
—
—
15.00 ns
50.00 ns
50.00 ns
Max
—
—
—
—
—
—
MOTOROLA
ns
ns
ns
ns
ns
ns
MHz
Unit
ns
ns
ns
ns
ns
ns
ns
Unit