參數(shù)資料
型號(hào)： S3P7544-SM
元件分類(lèi)： 微控制器/微處理器
英文描述： 4-BIT, OTPROM, 6 MHz, MICROCONTROLLER, PDSO24
封裝： 0.375 INCH, SOP-24
文件頁(yè)數(shù)： 14/27頁(yè)
文件大?。?/td> 206K
代理商： S3P7544-SM
S3P7544 OTP
S3C7544/P7544
16-2
Table 16-1. Descriptions of Pins Used to Read/Write the EPROM
Main Chip
During Programming
Pin Name
Pin No.
I/O
Function
P5.2
SDAT
22
I/O
Serial data pin. Output port when reading and input
port when writing. Can be assigned as a Input /
push-pull output port.
P5.3
SCLK
23
I/O
Serial clock pin. Input only pin.
TEST
4
I
Power supply pin for EPROM cell writing (indicates
that OTP enters into the writing mode). When 12.5
V is applied, OTP is in writing mode and when 5 V
is applied, OTP is in reading mode. (Option)
Hold GND when OTP is operating.
RESET
8
I
Chip initialization
V
DD/VSS
V
DD/VSS
24/1
–
Logic power supply pin. V
DD should be tied to +5 V
during programming.
NOTE: ( ) means the 32-SOP OTP pin number.
Table 16-2. Comparison of S3P7544 and S3C7544 Features
Characteristic
S3P7544
S3C7544
Program Memory
4 K-byte EPROM
4 K-byte mask ROM
Operating Voltage (V
DD)
1.8 V (3 MHz) to 5.5 V
OTP Programming Mode
V
DD = 5 V, VPP (TEST) = 12.5 V
–
Pin Configuration
24 SOP, 24 SDIP
EPROM Programmability
User Program one time
Programmed at the factory
OPERATING MODE CHARACTERISTICS
When 12.5 V is supplied to the V
PP(TEST) pin of the S3P7544, the EPROM programming mode is entered. The
operating mode (read, write, or read protection) is selected according to the input signals to the pins listed in
Table 16-3 below.
Table 16-3. Operating Mode Selection Criteria
V
DD
V
PP
(TEST)
REG/
MEM
Address
(A15-A0)
R/W
Mode
5 V
0
0000H
1
EPROM read
12.5 V
0
0000H
0
EPROM program
12.5 V
0
0000H
1
EPROM verify
12.5 V
1
0E3FH
0
EPROM read protection
NOTE: "0" means Low level; "1" means High level.
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