- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄362688 > EM78P467A (ELAN Microelctronics Corp .) 8-Bit Micro-Controller for Consumer Product(帶4K × 13片上ROM，工作電壓2.5V-5.5V的8位微控制器) PDF資料下載
參數(shù)資料
| 型號： | EM78P467A |
| 廠商： | ELAN Microelctronics Corp . |
| 英文描述： | 8-Bit Micro-Controller for Consumer Product(帶4K × 13片上ROM，工作電壓2.5V-5.5V的8位微控制器) |
| 中文描述： | 8位微控制器的消費產(chǎn)品（帶4K的× 13片上ROM的，工作電壓為2.5V至5.5V的8位微控制器） |
| 文件頁數(shù)： | 4/20頁 |
| 文件大?。?/td> | 144K |
| 代理商： | EM78P467A |
* This specification are subject to be changed without notice.
EM78P267/467A/B/C
8-BIT MICRO-CONTROLLER FOR CONSUMER PRODUCT
4
Preliminary
9.5.1997
R2 (Program Counter) & Stack
Depending on the device type, R2 and hardware stack are 12 bits wide. The structure is depicted in Fig. 3.
Generates 4Kx13 on-chip ROM addresses to the relative programming instruction codes. One program page
is 1K words long.
R2 is set all
“
1
”
s upon a RESET condition.
“
JMP
”
instruction allows the direct loading of the lower 10 program counter bits. Thus,
“
JMP
”
allows jump
to any location on one page.
“
CALL
”
instruction loads the lower 10 bits of the PC, and then PC+1 is pushed into the stack. Thus, the
subroutine entry address can be any location on one page.
“
RET
”
(
“
RETL k
”
,
“
RETI
”
) instruction loads the program counter with the contents at the top of stack.
“
MOV R2,A
”
allows the loading of an address from the
“
A
”
register to the lower 8 bits of PC, and the ninth
and tenth bits (A8~A9) of PC are cleared.
“
ADD R2,A
”
allows a relative address be added to the current PC, and the ninth and tenth bits of PC are cleared.
Any instruction which writes to R2 (e.g.
“
ADD R2,A
”
,
“
MOV R2,A
”
,
“
BC R2,6
”
,) (except
“
TBL
”
) will cause
the ninth and tenth bits (A8~A9) of PC to be cleared. Thus, the computed jump is limited to the first 256
locations of any program page.
“
TBL
”
allows a relative address be added to the current PC (R2+AR
→
2), and contents of the ninth and tenth
bits (A8~A9) of PC are not changed. Thus, the computed jump can be on the second (or third, 4th) 256 locations
on one program page.
In case of EM78P267/467, the most significant bits (A10~A11) will be loaded with the contents of bits PS0~PS1
in the status register (R3) upon the execution of a
“
JMP
”
,
“
CALL
”
, or any instruction which writes to R2.
Fig. 3 Program counter organization
CALL
RET
RTTL
RETI
00
01
10
11
PC
Page 0
000
3FF
400
7FF
800
BFF
C00
FFF
Page 1
Page 2
Page 3
A11 A10
A9 A8
A7 ~ A0
Stack 1
Stack 2
Stack 3
Stack 4
Stack 5
001: Hareware interrupt location
002: Software interrupt (INT instruction) location
FFF: Reset location
EM78P267
EM78P467
EM78P467
EM78P267/467
相關PDF資料 |
PDF描述 |
|---|---|
| EM78P267A | 8-Bit Micro-Controller for Consumer Product(帶2K × 13片上ROM，工作電壓2.5V-5.5V的8位微控制器) |
| EM78P468N | 8-BIT MICROCONTROLLER |
| EM78P468NAQ | 8-BIT MICROCONTROLLER |
| EM78P468NBQ | 8-BIT MICROCONTROLLER |
| EM78P468NCQ | 8-BIT MICROCONTROLLER |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| EM7A8620 | 制造商:EMC 制造商全稱:ELAN Microelectronics Corp 功能描述:Voice over IP |
| EM7G | 制造商:GULFSEMI 制造商全稱:Gulf Semiconductor 功能描述:ULTRAFAST EFFICIENT PLASTIC SILICON RECTIFIER VOLTAGE： 1000V CURRENT： 1.0A |
| EM800 | 制造商:EDI 制造商全稱:Electronic devices inc. 功能描述:HIGH VOLTAGE HIGH CURRENT MINIATURE RECTIFIERS |
| EM8000EHP | 制造商:JDSU 制造商全稱:JDS Uniphase Corporation 功能描述:The industrya??s most compact 100 G test solution |
| EM800-DCM | 制造商:MRV 制造商全稱:MRV 功能描述:LambdaDriver Dispersion Compensation Module (EM800/1600-DCM and DCMD) |
發(fā)布緊急采購，3分鐘左右您將得到回復。