NSAM266SA Datasheet, PDF (4/52 Pages) National Semiconductor (TI) – NSAM266SA CompactSPEECHTM Digital Speech Processor with Serial Flash Interface

1 0 Hardware (Continued)
1 2 PIN ASSIGNMENT
The following sections detail the pins of the NSAM266SA
processor Slashes separate the names of signals that
share the same pin
1 2 1 Pin Signal Assignment
Table 1-1 shows all the pins and the signals that use them
in different configurations It also shows the type and direc-
tion of each signal
TABLE 1-1 CompactSPEECH Pin Signal Assignment
Pin Name
Type
A(0 15)
TTL
CCLK
TTL
CDIN
TTL
CDOUT
TTL
CFS0
TTL
D(0 7)
TTL
MWCS
TTL (Note A)
TST
TTL
MWRDY
TTL
MWRQST
TTL
MWDOUT
TTL
PB(0 2)
TTL
(Note B)
PB(3 6)
TTL
(Note C)
EMCS
ENV0
TTL1 (Note D)
CMOS (Note E)
MWCLK
TTL
MWDIN
TTL
MMCLK
TTL1 (Note D)
MMDIN
TTL
MMDOUT
TTL1 (Note D)
CFS0
CMOS
RESET
Schmitt (Note A)
V_CC
Power
V_SS
Power
X1
XTAL
X2 CLKIN
XTAL
TTL
Note A Schmitt trigger input
Note B Virtual address lines for IVS ROM
Note C Chip select lines for Serial Flash devices
Note D TTL1 output signals provide CMOS levels in the steady
state for small loads
Note E Input during reset CMOS level input
Signal Name
A(0 15)
CCLK
CDIN
CDOUT
CFS0
D(0 7)
MWCS
TST
MWRDY
MWRQST
MWDOUT
EA(16 18)
CS(0 3)
EMCS
ENV0
MWCLK
MWDIN
MMCLK
MMDIN
MMDOUT
CFS0
RESET
V_CC
V_SS
X1
X2
CLKIN
IO
Output
Output
Input
Output
Output
IO
Input
Input
IO
IO
Output
Output
Output
Output
Input
Input
Input
Output
Input
Output
Output
Input
OSC
OSC
Input
http www national com
4