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參數(shù)資料
| 型號： | S3C8849 |
| 廠商： | SAMSUNG SEMICONDUCTOR CO. LTD. |
| 英文描述： | SAM87 family of 8-bit single-chip CMOS microcontrollers |
| 中文描述： | SAM87家庭的8位單芯片CMOS微控制器 |
| 文件頁數(shù)： | 20/20頁 |
| 文件大小： | 150K |
| 代理商： | S3C8849 |
S3P8849 OTP
S3C8847/C8849/P8849
17-2
Table 17-1. Descriptions of Pins Used to Read/Write the EPROM (S3P8849)
Main Chip
Pin Name
P2.3 (Pin 4)
During Programming
I/O
I/O
Serial data pin (output when reading, Input when
writing) Input and push-pull output port can be
assigned
I/O
Serial clock pin (Input only pin)
I
0 V: operating mode
5 V: test mode
12.5 V: OTP mode
I
5 V: operating mode, 0 V: OTP mode
Pin Name
SDAT
Pin No.
4
Function
P2.2 (Pin 3)
TEST
SCLK
3
13
V
PP
(TEST)
RESET
V
DD
/V
SS
RESET
V
DD
/V
SS
33
34/30, 37
I
Logic power supply pin.
Table 17-2. Comparison of S3P8849 and S3C8847/C8849Features
Characteristic
Program Memory
Operating Voltage (V
DD
)
OTP Programming Mode
S3P8849
S3C8847/C8849
32-K byte EPROM
4.5 V to 5.5 V
24/32-K byte mask ROM
4.5 V to 5.5 V
V
DD
= 5 V, TEST V
PP
= 12.5 V
42 SDIP
User Program 1 time
–
Pin Configuration
EPROM Programmability
42 SDIP
Programmed at the factory
OPERATING MODE CHARACTERISTICS
When 12.5 V is supplied to the V
PP
(TEST) pin of the S3P8849, 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 17-3. Operating Mode Selection Criteria
V
DD
V
PP
(TEST)
5 V
12.5 V
12.5 V
12.5 V
REG/
MEM
ADDRESS
(A15–A0)
R/W
MODE
5 V
0
0
0
1
0000H
0000H
0000H
0E3FH
1
0
1
0
EPROM read
EPROM program
EPROM verify
EPROM read protection
NOTE
:
"0" means Low level; "1" means High level.
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