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參數(shù)資料
| 型號： | TMP90PH48 |
| 廠商： | Toshiba Corporation |
| 英文描述： | A System Evaluation LSI With 8-Bit CPU,One-Time PROM(16384 x 8-Bit),RAM(512 x 8-Bit)(系統(tǒng)評估大規(guī)模集成電路（集成8位CPU，一次可編程ROM(16384 x 8位),RAM(512 x 8位)) |
| 中文描述： | 一個系統(tǒng)評價芯片與8位CPU，一次性可編程（16384 × 8位），內(nèi)存（512 × 8位）（系統(tǒng)評估大規(guī)模集成電路（集成8位的CPU，一次可編程ROM更新（16384 x 8位），內(nèi)存（512 × 8位）） |
| 文件頁數(shù)： | 10/14頁 |
| 文件大小： | 417K |
| 代理商： | TMP90PH48 |
10/14
TOSHIBA CORPORATION
TMP90PH48
(3)
The Security Bit
The TMP90PH48 has the Security Bit in PROM cell. If
the Security Bit is programmed to “0”, the content of
the PROM is disable to read in PROM mode.
How to program the Security Bit.
1) Connect A15 pins to Vcc. [Otherwise connect them
GND to program PROM, (address 0000H ~ 3FFFH)
2) Set programming address to 0000H.
3) To program the Security Bit, Do to “0”
4) Set D2 ~ D7 to “1”, respectively.
Table 3.1 Data to Program
Bit to PROGRAM
D0 ~ D7
A0 ~ A12
A15
The Security Bit
FEH
all “0”
all “1”
PROM (0000H ~ 1FFFH)
–
–
all “0”
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