MC68000 MOTOROLA [Motorola, Inc], MC68000 Datasheet - Page 317

• Manufacturer Part Number: MC68000
• Manufacturer: MOTOROLA [Motorola, Inc]

6.18 AC ELECTRICAL SPECIFICATIONS—SERIAL
MOTOROLA
NOTES:
(OUTPUT)
(OUTPUT)
1. This also applies when SPCLK is inverted by CI in the SPMODE register.
2. The enable signals for the slaves may be implemented by the parallel I/O pins.
(INPUT)
SPRXD
SPTXD
SPCLK
COMMUNICATIONS PORT
Num.
250
251
252
253
254
SPCLK Clock Output Period
SPCLK Clock Output Rise/Fall Time
Delay from SPCLK to Transmit (see Note 1)
SCP Receive Setup Time (see Note 1)
SCP Receive Hold Time (see Note 1)
Figure 6-19. Serial Communication Port Timing Diagram
250
1
1
Characteristic
2
2
MC68302 USER’S MANUAL
3
3
252
(see Figure 6-19).
253
4
4
251
Min
16.67 MHz
40
10
4
0
0
5
5
Max
64
15
40
—
—
254
Min
30
4
0
0
8
20 MHz
6
6
Max
64
10
30
—
—
Electrical Characteristics
7
7
Min
24
4
0
0
7
25 MHz
Max
64
24
—
—
8
8
8
Unit
clks
ns
ns
ns
ns
6-29