TMS320C30_16 Datasheet, PDF (30/53 Pages) Texas Instruments – DIGITAL SIGNAL PROCESSOR

TMS320C30
DIGITAL SIGNAL PROCESSOR
SPRS032A – APRIL 1996 – REVISED JUNE 1997
changing XFx from an output to an input
The following table defines the timing parameters for changing the XFx pin from an output pin to an input pin.
The numbers shown in Figure 17 correspond with those in the NO. column of the table below.
timing parameters of XFx changing from output to input mode (see Figure 17)
NO.
1 th(H3H-XF) Hold time, XFx after H3 high
2 tsu(XF-H1L) Setup time, XFx before H1 low
3 th(H1L-XF)
Hold time, XFx after H1 low
† _{For ’C30 PPM, tn(H3H-XF01) (max)=14 ns}
‡ _{This value is characterized but not tested}
’C30-27
MIN MAX
19‡
13
0
’C30-33
MIN MAX
15‡
10
0
’C30-40
MIN MAX
13†‡
9
0
’C30-50
MIN MAX
12‡
9
0
UNIT
ns
ns
ns
Execute
Load of
IOF
H3
Buffers Go Synchronizer Value on
From Output
Delay
Pin
to Output
Seen in IOF
H1
I / OXFx
Bit
(see Note A)
XFx
Output
2
3
1
INXF Bit
(see Note A)
Data
Sampled
Data
Seen
NOTE A: I / OXFx represents bit 1 or 5 of the IOF register, and INXFx represents either bit 3 or bit 7 of the IOF register.
Figure 17. Timing for Change of XFx From Output to Input Mode
30
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