dspb56011 Freescale Semiconductor, Inc, dspb56011 Datasheet - Page 36

• Manufacturer Part Number: dspb56011
• Description: 24-bit Dvd Digital Signal Processor
• Manufacturer: Freescale Semiconductor, Inc

Specifications
Host Interface (HI) Timing
2-10
HOREQ
(Output)
(Output)
Notes:
H0–H7
Num
(Input)
(Input)
HACK
HR/W
47
48
49
1.
2.
3.
4.
5.
6.
Delay from HEN deassertion to HOREQ assertion for
RXL read
Delay from HEN deassertion to HOREQ assertion for
TXL write
Delay from HEN assertion to HOREQ deassertion for
RXL read, TXL write
See Host Port Considerations in Section 4 Design Considerations.
This timing is applicable only if a write to the TXL is followed by writing the TXL, TXM, or TXH
registers without first polling the TXDE or HOREQ flags, or waiting for HOREQ to be asserted.
This timing is applicable only if a read from the RXL is followed by reading the RXL, RXM or RXH
registers without first polling the RXDF or HOREQ flags, or waiting for HOREQ to be asserted.
HOREQ is pulled up by a 1 k resistor.
Specifications are periodically sampled and not 100% tested.
May decrease to 0 ns for future versions
Table 2-8 Host I/O Timing (All Frequencies) (Continued)
4,5
4,5
Figure 2-8 Host Interrupt Vector Register (IVR) Read
41
35
DSP56011 Technical Data Sheet, Rev. 1
Characteristics
4,5
Preliminary Information
36
31
Data Valid
42
38
T
37
L
32
T
+ T
L
Min
+ T
3
C
+ T
C
H
Max
—
—
58
MOTOROLA
Unit
ns
ns
ns
AA1275