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參數(shù)資料
| 型號： | ST6395B1 |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | 8-BIT HCMOS MCUs FOR TV FREQUENCY SYNTHESIS WITH OSD |
| 中文描述： | 8位微控制器HCMOS電視頻率合成帶OSD |
| 文件頁數(shù)： | 15/68頁 |
| 文件大?。?/td> | 560K |
| 代理商： | ST6395B1 |
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D7-D5.
Thesebits arenot used.
PRPR4-PRPR0.
These are the program ROM
banking bitsand thevalue loaded selects the cor-
responding page to be addressed in the lower part
of 4Kprogramaddress space asspecifiedin Table
3. Thisregisteris undefined onreset.
Note.
The number of bits implemented depends
on the size of the ROM of the device. Only the
lower part of address space has been bank-
switched because interrupt vectors and common
subroutines should be available all the time. The
reason of this structure is due to the fact that it is
not possible to jump from a dynamic page to an-
other, unless jumping back to the static page,
changingcontents of PRPR,and, than,jumping to
a differentdynamic page.
Care is required when handlingthe PRPR as it is
write only. For this reason, it is not allowed to
change the PRPR contents while executing inter-
rupts drivers, as the driver cannot save and than
restore its previous content. Anyway, this opera-
tion may be necessaryif the sum of commonrou-
tines and interrupt drivers will take more than 2K
bytes;in thiscase could be necessaryto divide the
PRPR
Program ROMPage Register
(CAh, Write Only)
D7 D6 D5 D4 D3 D2 D1 D0
PRPR0
PRPR1
PRPR2
PRPR3
UNUSED
Figure13. Program ROM Page Register
PRPR3
PRPR2
PRPR1
PRPR0
PC11
Memory
Page
X
X
X
X
1
Static
Page
(Page 1)
0
0
0
0
0
Page 0
0
0
0
1
0
Page 1
(Static
Page)
0
0
1
0
0
Page 2
0
0
1
1
0
Page 3
0
1
0
0
0
Page 4
0
1
0
1
0
Page 5
0
1
1
0
0
Page 6
0
1
1
1
0
Page 7
1
0
0
0
0
Page 8
1
0
0
1
0
Page 9
Table 3. ST639x ProgramROM Page Register
Coding
MEMORY SPACES
(Continued)
interrupt driver in a (minor) part in the static page
(start and end), and in the second (major) part in
one dynamic page. If it is impossible to avoid the
writing of this register in interrupts drivers, an im-
age of this register must be saved in a RAM loca-
tion, and eachtime the programwrites the PRPR it
writes also the image register. The image register
must be written first, so if an interrupt occurs be-
tween the two instructions the PRPR is not af-
fected.
ST6391,92,93,95,97,99
11/64
相關(guān)PDF資料 |
PDF描述 |
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| ST6391B1 | MOSFET; Transistor Polarity:Dual N Channel; Continuous Drain Current, Id:2.6A; On-Resistance, Rds(on):0.18ohm; Package/Case:8-SOIC; Leaded Process Compatible:No; Mounting Type:surface mount; Peak Reflow Compatible (260 C):No |
| ST6392 | 8-BIT HCMOS MCUs FOR TV FREQUENCY SYNTHESIS WITH OSD |
| ST6393 | 8-BIT HCMOS MCUs FOR TV FREQUENCY SYNTHESIS WITH OSD |
| ST6395 | 8-BIT HCMOS MCUs FOR TV FREQUENCY SYNTHESIS WITH OSD |
| ST6397 | 8-BIT HCMOS MCUs FOR TV FREQUENCY SYNTHESIS WITH OSD |
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| ST6397 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:8-BIT HCMOS MCUs FOR TV FREQUENCY SYNTHESIS WITH OSD |
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