Z8932120PSC Datasheet, PDF (3/40 Pages) Zilog, Inc. – 16-BIT DIGITAL SIGNAL PROCESSORS

Zilog
PIN DESCRIPTION
Z89321/371/391
16-Bit Digital Signal Processors
1
EXT12 1
40 RXD
EXT13
VSS
EXT14
EXT2
VSS
EXT1
EXT15
EXT0
EXT3
VSS
EXT4
FS1
VSS
U01
EXT5
U00
EXT6
EXT7
DIP 40 - Pin
/INT0
FS0
TXD
CLK
EXT8
/DS
EXT9
VDD
VSS
EA2
EXT10
EA1
EXT11
EA0
UI1
/RESET
UI0
RD//WR
SCLK 20
21 VDD
Figure 2. Z89321/371 40-Pin DIP Pin Assignments
Table 1. Z89321/371 40-Pin DIP Pin IdentiÞcation
Table 1. Z89321/371 40-Pin DIP Pin IdentiÞcation
No.
1-3
4
5
6-7
8
9-11
12
13-14
15
16-17
18
19
20
21
22
Symbol
EXT12-
EXT14
V _SS
EXT15
EXT3-EXT4
V_SS
EXT5-EXT7
TXD
EXT8-EXT9
V_SS
EXT10-
EXT11
UI1
UI0
SCLK
V_DD
RD//WR
Function
External Data
Bus
Ground
External Data
Bus
External Data
Bus
Ground
External Data
Bus
Serial Output to
CODECs
External Data
Bus
Ground
External Data
Bus
User Input
User Input
CODEC Serial
Clock
Power Supply
Strobes for
External Bus
Direction
Input/Output
Input/Output
Input/Output
Input/Output
Output
Input/Output
Input/Output
Input
Input
Input/Output*
Input
Output
No. Symbol
Function
Direction
23
24-26
27
28
29
30
31
32-33
34
35
36-38
39
40
/RESET
EA0-EA2
V_DD
/DS
CLK
FS0
/INT0
UO0-UO1
FS1
V_SS
EXT0-EXT2
V_SS
RXD
Reset
Input
External Address Output
Bus
Power Supply Input
Data Strobe for Output
External Bus
Clock
Input
CODEC 0 Frame Input/Output*
Sync
Interrrupt
Input
User Output
Output
CODEC 1 Frame Input/Output*
Sync
Ground
External Data
Bus
Ground
Input/Output
Serial Input from Input
CODECs
Notes:
*Input/Output is defined by interface mode selection.
HALT/WAIT pins not available on 40-pin DIP package.
DS97DSP0100
PRELIMINARY
3