3F9454B データシートの表示（PDF） - Samsung

部品番号

コンポーネント説明

メーカー

3F9454B

8-BIT CMOS MICROCONTROLLER

Samsung 

S3C9454B/F9454B

S3F9454B MTP

Main Chip

Pin Name

P0.1

P0.0

RESET, P1.2

VDD/VSS

Table 15-1. Descriptions of Pins Used to Read/Write the Flash ROM

Pin Name

SDA

SCL

VPP

VDD/VSS

During Programming

Pin No.

I/O

Function

18 (20-pin)

14 (16-pin)

I/O Serial data pin (output when reading, Input

when writing) Input and push-pull output port

can be assigned

19 (20-pin)

15 (16-pin)

I Serial clock pin (input only pin)

4

I Power supply pin for flash ROM cell writing

(indicates that MTP enters into the writing

mode). When 12.5 V is applied, MTP is in

writing mode and when 5 V is applied,

MTP is in reading mode. (Option)

20 (20-pin), 16 (16-pin)

1 (20-pin), 1 (16-pin)

I Logic power supply pin.

Table 15-2. Comparison of S3F9454B and S3C9454B Features

Characteristic

Program memory

Operating voltage (VDD)

MTP programming mode

Pin configuration

EPROM programmability

S3F9454B

S3C9454B

4 Kbyte Flash ROM

2.0 V to 5.5 V

4K byte mask ROM

2.0 V to 5.5 V

VDD = 5 V, VPP = 12.5 V

20 DIP/20 SOP/20 SSOP/16 DIP/16SOP/16 SSOP/8 DIP/8 SOP

User Program multi time

Programmed at the factory

OPERATING MODE CHARACTERISTICS

When 12.5 V is supplied to the VPP pin of the S3F9454B Flash ROM 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 15-3

below.

Table 15-3. Operating Mode Selection Criteria

VDD

VPP REG/MEM

5V

5V

0

12.5 V

0

12.5 V

0

12.5 V

1

Address

(A15–A0)

0000H

0000H

0000H

0E3FH

R/W

Mode

1

Flash ROM read

0

Flash ROM program

1

Flash ROM verify

0

Flash ROM read protection

NOTE: "0" means Low level; "1" means High level.

15-3

Share Link: