spakdsp301vl100 Freescale Semiconductor, Inc, spakdsp301vl100 Datasheet - Page 62

• Manufacturer Part Number: spakdsp301vl100
• Description: Dsp56301 24-bit Digital Signal Processor
• Manufacturer: Freescale Semiconductor, Inc

Specifications
2-36
330
331
332
346
347
348
Notes:
No.
HIRQ High Impedance from Data Strobe Assertion
(HIRH = 1, HIRD = 0)
HIRQ Active from Data Strobe Deassertion
(HIRH = 1, HIRD = 0)
HIRQ Deasserted Hold from Data Strobe Deassertion
HRST Assertion to Host Port Pins High Impedance
HBS Assertion to CLKOUT Rising Edge
Data Strobe Deassertion to CLKOUT Rising Edge
1.
2.
3.
4.
5.
6.
7.
8.
The Data Strobe is HRD or HWR in the Dual Data Strobe mode and HDS in the Single Data Strobe mode.
HTA, HDRQ, and HRST may be programmed as active-high or active-low. In the example timing diagrams, HDRQ and HRST
are shown as active-high and HTA is shown as active low.
The Read Data Strobe is HRD in the Dual Data Strobe mode and HDS in the Single Data Strobe mode.
The Write Data Strobe is HWR in the Dual Data Strobe mode and HDS in the Single Data Strobe mode.
HTA requires an external pull-down resistor if programmed as active high (HTAP = 0); or an external pull-up resistor if
programmed as active low (HTAP = 1). The resistor value should be consistent with the DC specifications.
HIRQ requires an external pull-up resistor if programmed as open drain (HIRD = 0). The resistor value should be consistent
with the DC specifications.
“LT” is the value of the latency timer register (CLAT) as programmed by the user during self configuration.
Values are valid for V
Table 2-19.
(HIRD = 1,
(HIRD = 0,
HA[10–0]
HIRH = 1)
HIRH = 1)
HDS
HRD
HWR
HIRQ
HIRQ
HBS
1,6
1
Characteristic
Universal Bus Mode, Synchronous Port A Type Host Timing (Continued)
Figure 2-27.
CC
= 3.3 ± 0.3V
DSP56301 Technical Data, Rev. 10
305
308
Universal Bus Mode I/O Access Timing
301
1
2
307
1
329
330
309
100 MHz: 2.5 × T
80 MHz: 2.5 × T
328
Expression
2.5 × T
2.5 × T
310
C
C
C
C
+ 24.7
+ 21.5
Min
31.3
31.3
4.3
7.4
—
—
80 MHz
302
332
331
Max
55.9
22.2
—
—
—
—
Freescale Semiconductor
Min
25.0
25.0
3.4
5.9
—
—
100 MHz
Max
46.5
19.6
—
—
—
—
Unit
ns
ns
ns
ns
ns
ns
ns