Dma Module Ac Electrical Specifications; Dma Signal Timing Diagram - Motorola MC68340 User Manual

11.8 DMA MODULE AC ELECTRICAL SPECIFICATIONS

(d) corresponding to part operation, GND = 0 Vdc, TA = 0 to 70 C; see Figure 11-12)
Num. Characteristic
1 CLKOUT Low to AS , DACK , DONE Asserted
2 CLKOUT Low to AS , DACK Negated
3 DREQ Asserted to AS Asserted (for DMA Bus
Cycle)
1
4 Asynchronous Input Setup Time to CLKOUT
Low
5 Asynchronous Input Hold Time from CLKOUT
Low
AS to DACK Assertion Skew
6
7 DACK to DONE Assertion Skew
8 AS , DACK , DONE Width Asserted
8A AS , DACK , DONE Width Asserted (Fast
Termination Cycle)
NOTES:
(a) The electrical specifications in this document for both the 8.39 and 16.78 MHz @ 3.3 V 0.3 V are preliminary
and apply only to the appropriate MC68340V low voltage part.
(b) The 16.78-MHz specifications apply to the MC68340 @ 5.0 V 5% operation.
(c) The 25.16 MHz @ 5.0 V 5% electrical specifications are preliminary.
(d) For extended temperature parts T A = –40 to +85 C. These specifications are preliminary.
1. Specification #4 for 16.78 MHz @ 3.3 V 0.3 V will be 8 ns.
S0
CLKOUT
4
DONE (INPUT)
DREQ
AS
DACK
DONE
(OUTPUT)
MOTOROLA
Freescale Semiconductor, Inc.
CPU_CYCLE
(DMA REQUEST)
S1 S2 S4
S3
5
3
Figure 11-12. DMA Signal Timing Diagram
MC68340 USER'S MANUAL
For More Information On This Product,
Go to: www.freescale.com
3.3 V 3.3 V or 5.0 V
8.39 MHz 16.78 MHz
Min Max Min Max
— 60 — 30
— 60 — 30
3t cyc + t AIST + t CLSA
15 — 8, 5 —
30 — 15 —
-30 30 –15 15
-30 30 –15 15
200 — 100 —
80 — 40 —
DMA_CYCLE
S5 S0 S1 S2
1
6
1
7
1
(See notes (a), (b), (c), and
5.0 V
25.16 MHz
Min Max Unit
— 20 ns
— 20 ns
ns
5 — ns
10 — ns
–10 10 ns
–8 8 ns
70 — ns
28 — ns
S4 S5
S3
8
2
11-19