Z89139 Zilog., Z89139 Datasheet - Page 50
Z89139
Manufacturer Part Number
Z89139
Description
Voice Processing Controllers
Manufacturer
Zilog.
Datasheet
1.Z89139.pdf
(66 pages)
- Current page: 50 of 66
- Download datasheet (437Kb)
Z89138/Z89139
Voice Processing Controllers
DSP IRQ0. This bit defines the source of the DSP IRQ0 in-
terrupt.
D/A_Sampling Rate. This field defines the sampling rate
of the D/A output. It changes the period to Timer3 interrupt
and the maximum possible accuracy of the D/A Sampling
Rate (Table 18).
DSP0. DSP0 is a general-purpose output pin connected to
Bit 6. This bit has no special significance and can be used
to output data by writing to bit 6.
DSP1. DSP1 is a general-purpose output pin connected to
Bit 7. This bit has no special significance and can be used
to output data by writing to bit 7.
DSP TIMERS
Timer2 is a free running counter that divides the XTAL fre-
quency (20.48 MHz) to support different sampling rates for
the A/D converter. The sampling rate is defined by the An-
alog Control Register. Upon reaching the end of a count,
the timer generates an interrupt request to the DSP.
50
D/A_Sampling Rate
Bit 8
0
1
Table 18. D/A Data Accuracy
20.48 MHz
16 kHz
10 kHz
Sampling Rate
20.48 MHz
29.49 MHz
OSC
USC
29.49 MHz
Figure 37. Timer2 and Timer3
8.04 kHz
9.6 kHz
P R E L I M I N A R Y
8.04, 9.6 kHz
16, 9.6 kHz
8, 16 kHz
16, 10 kHz
Timer2
Timer2
Timer3
Timer3
Enable A/D. Writing a 0 to this location disables the A/D
converter, a 1 will enable it. A hardware reset forces this
bit to 0.
Conversion Done. This Read-Only flag indicates that the
A/D conversion is complete. Upon reading EXT5 (A/D da-
ta), the Conversion Done flag is cleared.
Start A/D Conversion. Writing a 1 to this location immedi-
ately starts one conversion cycle. If this bit is reset to 0 the
input data is converted upon successive Timer2 time-outs.
A hardware reset forces this bit to 1.
A/D_Sampling Rate. This field defines the sampling rate
of the A/D. It changes the period of Timer2 interrupt (Table
19).
Analogous to Timer2, Timer3 generates the different sam-
pling rates for the D/A converter. Timer3 also generates an
interrupt request to the DSP upon reaching its final count
value (Figure 37).
A/D_Sampling Rate
Bit 0
1
0
Table 19. A/D Sampling Rate
D/A
A/D
D/A
A/D
20.48 MHz
16 kHz
8 kHz
Sampling Rate
DS97TAD0201
29.49 MHz
9.6 kHz
16 kHz
Zilog
Related parts for Z89139
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
40-Pin Low-Cost Digital Television Controller
Manufacturer:
Zilog.
Datasheet:
Part Number:
Description:
40-PIN LOW-COST DIGITAL TELEVISION CONTROLLER
Manufacturer:
Zilog.
Datasheet:
Part Number:
Description:
TELEVISION CONTROLLERS
Manufacturer:
Zilog.
Datasheet:
Part Number:
Description:
Z8 Digital Television Controllers
Manufacturer:
Zilog.
Datasheet:
Part Number:
Description:
DIGITAL TELEVISION CONTROLLER IN-CIRCUIT EMULATOR (ICE) DEVICE
Manufacturer:
Zilog.
Datasheet:
Part Number:
Description:
IPC INTELLIGENT PERIPHERAL CONTROLLER
Manufacturer:
Zilog.
Datasheet:
Part Number:
Description:
NMOS/CMOS Z80 PIO PARALLEL INPUT/OUTPUT
Manufacturer:
Zilog.
Datasheet:
Part Number:
Description:
NMOS/CMOS Z80 CTC COUNTER/TIMER CIRCUIT
Manufacturer:
Zilog.
Datasheet:
Part Number:
Description:
SERIAL INPUT/OUTPUT CONTROLLER
Manufacturer:
Zilog.
Datasheet:
Part Number:
Description:
DIGITAL TELEVISION CONTROLLER
Manufacturer:
Zilog.
Datasheet:
Part Number:
Description:
Digital Television Controller
Manufacturer:
Zilog.
Datasheet:
Part Number:
Description:
DIGITAL TELEVISION CONTROLLER
Manufacturer:
Zilog.
Datasheet:
Part Number:
Description:
DIGITAL TELEVISION CONTROLLER
Manufacturer:
Zilog.
Datasheet:
Part Number:
Description:
16-BIT DIGITAL SIGNAL PROCESSORS
Manufacturer:
Zilog.
Datasheet:
Part Number:
Description:
16-Bit Digital Signal Processors
Manufacturer:
Zilog.
Datasheet: