mpc880 Freescale Semiconductor, Inc, mpc880 Datasheet - Page 59

• Manufacturer Part Number: mpc880
• Description: Mpc885 Powerquicc Integrated Communications Processor
• Manufacturer: Freescale Semiconductor, Inc

12.7
Table 22
1
2
Table 23
1
2
Freescale Semiconductor
The ratios SyncCLK/RCLK1 and SyncCLK/TCLK1 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.
The ratios SyncCLK/RCLK1 and SyncCLK/TCLK1 must be greater than or equal to 3/1.
Also applies to CD and CTS hold time when they are used as external sync signals
Num
Num
100
101
102
103
104
106
107
100
102
103
104
106
107
105
108
105
108
provides the NMSI external clock timing.
provides the NMSI internal clock timing.
RCLK1 and TCLK1 width high
RCLK1 and TCLK1 width low
RCLK1 and TCLK1 rise/fall time
TXD1 active delay (from TCLK1 falling edge)
RTS1 active/inactive delay (from TCLK1 falling edge)
CTS1 setup time to TCLK1 rising edge
RXD1 setup time to RCLK1 rising edge
RXD1 hold time from RCLK1 rising edge
CD1 setup time to RCLK1 rising edge
RCLK1 and TCLK1 frequency
RCLK1 and TCLK1 rise/fall time
TXD1 active delay (from TCLK1 falling edge)
RTS1 active/inactive delay (from TCLK1 falling edge)
CTS1 setup time to TCLK1 rising edge
RXD1 setup time to RCLK1 rising edge
RXD1 hold time from RCLK1 rising edge
CD1 setup time to RCLK1 rising edge
SCC in NMSI Mode Electrical Specifications
MPC885/MPC880 PowerQUICC™ Hardware Specifications, Rev. 4
Characteristic
Characteristic
Table 22. NMSI External Clock Timing
Table 23. NMSI Internal Clock Timing
1
1
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
Max
30.00
30.00
Max
—
—
—
—
—
—
—
—
—
—
—
MHz
Unit
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
59