dsp56167 Freescale Semiconductor, Inc, dsp56167 Datasheet - Page 64

• Manufacturer Part Number: dsp56167
• Description: Advance Information 16-bit Digital Signal Processor
• Manufacturer: Freescale Semiconductor, Inc

Specifications
OnCE Port Timing
OnCE PORT TIMING
V
2-38
DD
Note:
Num
(Input)
DSCK
180
181
182
183
184
185
186
187
188
190
191
192
193
194
= 5.0 V 10%; T
DSCK High to DSO Valid
DSI valid to DSCK low (setup)
DSCK low to DSI invalid (hold)
DSCK high
DSCK low
DSCK cycle time
CLKO high to OS0–OS1 valid
CLKO high to OS0–OS1 invalid
Last DSCK high to OS0–OS1
Last DSCK high to ACK active (data)
Last DSCK high to ACK active (command)
DSO (ACK) asserted to first DSCK high
DSO (ACK) width asserted:
Last DSCK low of read register to first
DSCK high of next command
DSCK high to DSO invalid
DR asserted to DSO (ACK) asserted
1.
2.
a. when entering Debug mode
b. when acknowledging command/data transfer
45–55% duty cycle
T
D
= DSCK high (timing number 183)
1
J
1
= –40 to +115˚C; C
1
Figure 2-32 OnCE Serial Clock Timing
Characteristics
Table 2-19 OnCE Port Timing
2
2
DSP56167/D, Rev. 1
L
184
= 50 pF + 1 TTL load
2
2
185
10T + T
10T + T
21T + T
183
Min
2T
4T
3T
6T
19.4
—
15
33
—
—
34
51
5
7
D
D
D
C
C
C
C
+14.5
+13.5
+13.5
Max
27.6
14.5
21.7
MOTOROLA
—
—
—
—
—
—
—
—
—
—
—
—
—
—
AA0805
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns