參數(shù)資料
型號(hào): S3C8478XX-QZ
元件分類(lèi): 微控制器/微處理器
英文描述: 8-BIT, MROM, 12 MHz, MICROCONTROLLER, PQFP44
封裝: 10 X 10 MM, QFP-44
文件頁(yè)數(shù): 17/24頁(yè)
文件大小: 165K
代理商: S3C8478XX-QZ
S3C8478/C8475/P8475
S3P8475 OTP
16-3
Table 16-1. Descriptions of Pins Used to Read/Write the EPROM
Main Chip
During Programming
Pin Name
Pin No.
I/O
Function
P4.3
SDAT
9(3)
I/O
Serial data pin. Output port when reading and
input port when writing. Can be assigned as a
Input/push-pull output port.
P4.2
SCLK
10(4)
I
Serial clock pin. Input only pin.
TEST
V
PP
14(16)
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 aplied, OTP is in reading mode.
(Option)
RESET
18(12)
I
Chip Initialization
V
DD/VSS
V
DD/VSS
11(5)/12(6)
Logic power supply pin. V
DD should be tied to
+5 V during programming.
NOTE: ( ) means 44 QFP package.
Table 16-2. Comparison of S3C8475 and S3C8478/C8475 Features
Characteristic
S3C8475
S3C8478/C8475
Program Memory
16-Kbyte EPROM
8/16-Kbyte mask ROM
Operating Voltage (V
DD)
1.8 V to 5.5 V
OTP Programming Mode
V
DD = 5 V, VPP (EA) = 12.5 V
Pin Configuration
42 SDIP/44 QFP
EPROM Programmability
User Program 1 time
Programmed at the factory
OPERATING MODE CHARACTERISTICS
When 12.5 V is supplied to the V
PP (TEST) pin of the S3C8475, 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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