W55412A Datasheet, PDF (2/5 Pages) Winbond – VOICE PROM (256K OTP)

W55412A
PIN DESCRIPTION
NO.
PIN NAME
I/O
DESCRIPTION
Read
Program/Erase/Repair
1
VPP
I NC
Logic input
2 MCLK/PREDATA I/O NC
Logic input
3
VSS
I Negative power supply
Negative power supply
4
WRP
I/O Write clock pulse line
No use
5
DATA
I/O Bidirectional data line
No use
6
RDP
I Read clock pulse line
No use
7
VDD
I Positive voltage supply
Positive voltage supply
8 MODE/PGM/CLK I NC
Logic input
BLOCK DIAGRAM
MCLK/PREDATA ^VPP MODE/PGM/CLK ^{VDD VSS}
RDP
WRP
DATA
I/O Control/Address Counter/Register
9
9
8
8
Input
Buffer
8
Mux
512
X-DEC
Core
Array
Y-DEC/
Mux
SenAMP
8
DeMux/Output
Buffer
1 to 8
DeMux
8
Mux
Redundant
Array
Decoder
SenAMP
FUNCTIONAL DESCRIPTION
Voice data are written to the W55412A using the Winbond writer and the Winbond Coding System.
The voice data must be converted to *.obj form before being written to the W55412A.
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