 |
전자부품 데이터시트 검색엔진 |
|
|
전자부품 데이터시트 검색엔진 |
|
Q67120-C2005 데이터시트(PDF) 26 Page - Siemens Semiconductor Group |
|
||||||||||||||||||||||||||||||
Q67120-C2005 데이터시트(HTML) 26 Page - Siemens Semiconductor Group |
|
|
26 / 48 page  C501 Semiconductor Group 26 1997-04-01 Quick-Pulse Programming The setup for microcontroller quick-pulse programming is shown in figure 10. Note that the C501- 1E is running with a 4 to 6 MHz oscillator The reason the oscillator needs to be running is that the device is executing internal address and program data transfers. The address of the OTP memory location to be programmed is applied to port 1 and 2 as shown in figure 10. The code byte to be programmed into that location is applied to port 0. RESET, PSEN and pins of port 2 and 3 specified in table 11 are held at the “Program code data“ levels. The ALE/ PROG signal is pulsed low 25 times as shown in figure 11. For programming of the encryption table, the 25 pulse programming sequence must be repeated for addresses 0 through 1FH, using the “Program encrytion table“ levels. After the encryption table is programmed, verification cycles will produce only encrypted data. For programming of the security bits, the 25 pulse programming sequence must be repeat using the “Program security bit“ levels. After one security bit is programmed, further programming of the code memory and encryption table is disabled. However, the other security bit can still be programmed. Note that the EA/VPP pin must not be allowed to go above the maximum specified VPP level. for any amount of time. Even a narrow glitch above that voltage can cause permanent damage to the device. The VPP source should be well regulated and free of glitches and overshoots. Program Verification If security bit 2 has not been programmed, the on-chip OTP program memory can be read out for program verification. The address of the OTP program memory locations to be read is applied to ports 1 and 2 as shown in figure 12. The other pins are held at the “Verify code data“ levels indicated in table 11. The contents of the address location will be emitted on port 0. External pullups are required on port 0 for this operation. If the encryption table has been programmed, the data presented at port 0 will be the exclusive NOR of the program byte with one of the encryption bytes. The user will have to know the encryption table contents in order to correctly decode the verification data. The encryption table itself cannot be read out. Reading the SIgnature Bytes The signature bytes are read by the same procedure as a normal verification of loctions 30H and 31H, except that P3.6 and P3.7 need to be pulled to a logic low. The values are : 30H = E0H indicates manufacturer 31H = 71H indicates C501-1E |
유사한 부품 번호 - Q67120-C2005 |
|
유사한 설명 - Q67120-C2005 |
|
|
링크 URL |
| 개인정보취급방침 |
| ALLDATASHEET.CO.KR |
| ALLDATASHEET 가 귀하에 도움이 되셨나요? [ DONATE ] |
Alldatasheet는? | 광고문의 | 운영자에게 연락하기 | 개인정보취급방침 | 링크교환 | 제조사별 검색 All Rights Reserved©Alldatasheet.com |
| Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
|
Family Site : ic2ic.com |
icmetro.com |
Korean ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
