MPC875 Freescale Semiconductor, Inc, MPC875 Datasheet - Page 57

• Manufacturer Part Number: MPC875
• Description: Mpc875 Powerquicc Integrated Communications Processor
• Manufacturer: Freescale Semiconductor, Inc

13.6
Table 22
1
2
Table 23
1
2
Freescale Semiconductor
Num
Num
100
101
102
103
104
105
106
107
108
The ratios SYNCCLK/RCLK3 and SYNCCLK/TCLK3 must be greater than or equal to 2.25/1.
Also applies to CD and CTS hold time when they are used as external SYNC signals.
100
102
103
104
105
106
107
108
The ratios SYNCCLK/RCLK3 and SYNCCLK/TCLK3 must be greater or equal to 3/1.
Also applies to CD and CTS hold time when they are used as external SYNC signals.
RCLK3 and TCLK3 width high
RCLK3 and TCLK3 width low
RCLK3 and TCLK3 rise/fall time
TXD3 active delay (from TCLK3 falling edge)
RTS3 active/inactive delay (from TCLK3 falling edge)
CTS3 setup time to TCLK3 rising edge
RXD3 setup time to RCLK3 rising edge
RXD3 hold time from RCLK3 rising edge
CD3 setup time to RCLK3 rising edge
RCLK3 and TCLK3 frequency
RCLK3 and TCLK3 rise/fall time
TXD3 active delay (from TCLK3 falling edge)
RTS3 active/inactive delay (from TCLK3 falling edge)
CTS3 setup time to TCLK3 rising edge
RXD3 setup time to RCLK3 rising edge
RXD3 hold time from RCLK3 rising edge
CD3 setup time to RCLK3 rising edge
provides the NMSI external clock timing.
provides the NMSI internal clock timing.
SCC in NMSI Mode Electrical Specifications
MPC875/MPC870 PowerQUICC™ Hardware Specifications, Rev. 4
Characteristic
1
1
Characteristic
Table 22. NMSI External Clock Timing
Table 23. NMSI Internal Clock Timing
2
2
1/SYNCCLK + 5
1/SYNCCLK
0.00
0.00
5.00
5.00
5.00
5.00
Min
—
All Frequencies
40.00
40.00
40.00
0.00
0.00
0.00
0.00
Min
—
All Frequencies
CPM Electrical Characteristics
SYNCCLK/3
15.00
50.00
50.00
30.00
30.00
Max
Max
—
—
—
—
—
—
—
—
—
—
—
MHz
Unit
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
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