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Z89321 Datasheet(PDF) 7 Page - Zilog, Inc.

Part # Z89321
Description  16-BIT DIGITAL SIGNAL PROCESSORS
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Manufacturer  ZILOG [Zilog, Inc.]
Direct Link  http://www.zilog.com
Logo ZILOG - Zilog, Inc.

Z89321 Datasheet(HTML) 7 Page - Zilog, Inc.

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Z89321/371/391
Zilog
16-Bit Digital Signal Processors
DS97DSP0100
P R E L I M I N A R Y
7
1
Table 3. Z89321/371 44-Pin QFP Pin IdentiÞcation
No.
Symbol
Function
Direction
1-2
EXT3-EXT4
External data bus
Input/Output
3VSS
Ground
4-6
EXT5-EXT7
External data bus
Input/Output
7
TXD
Serial output to CODECs
Output
8-9
EXT8-EXT9
External data bus
Input/Output
10
VSS
Ground
11-12
EXT10-EXT1
External data bus
Input/Output
13
/INT2
Interrupt
Input
14
/INT1
Interrupt
Input
15
UI1
User input
Input
16
UI0
User input
Input
17
SCLK
CODEC serial clock
Input/Output*
18
VDD
Power supply
Input
19
RD//WR
RD//WR strobe EXT bus
Output
20
WAIT
WAIT state
Input
21
/RESET
Reset
Input
22-24
EA0-EA2
External address bus
Output
25
VDD
Power supply
Input
26
/DS
Data strobe for external bus
Output
27
CLK
Clock
Input
28
HALT
Stop execution
Input
29
FS0
CODEC 0 frame sync
Input/Output*
30
/INT0
Interrupt
Input
31-32
UO0-UO1
User output
Output
33
FS1
CODEC 1 frame sync
Input/Output*
34
VSS
Ground
35-37
EXT0-EXT2
External data bus
Input/Output
38
VSS
Ground
39
RXD
Serial input to CODECs
Input
40-42
EXT12-EXT14
External data bus
Input/Output
43
VSS
Ground
44
EXT15
External data bus
Input/Output
Note: *Input or output is defined by interface mode selection.


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