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參數(shù)資料
| 型號： | EM73400 |
| 廠商： | ELAN Microelctronics Corp . |
| 英文描述： | 4-Bit Micro-Controller for General-Purpose Product(用于通訊產(chǎn)品，家用電器，消費類產(chǎn)品的工作電壓4.5-5.5V的4位微控制器) |
| 中文描述： | 4位微控制器一般通用產(chǎn)品（用于通訊產(chǎn)品，家用電器，消費類產(chǎn)品的工作電壓4.5 - 5.5V的的4位微控制器） |
| 文件頁數(shù)： | 23/38頁 |
| 文件大?。?/td> | 197K |
| 代理商： | EM73400 |
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* This specification are subject to be changed without notice.
6.11.1998
EM73400
4-BIT MICRO-CONTROLLER FOR GENERAL PURPOSE PRODUCT
is almost the same as the previous one ( internal clock transmit mode ) . This type is achieved by setting P31
to "X001", and for the security of SIO execution, each high level and low level of the transfer clock must be
2 instruction cycles at least.
The operation procedure is decript as following :
1. Setting transfer out data to P15(SIO data buffer).
2. Setting the transfer mode and type by setting P31 = 0 0 01 .
3. Start SIO transfer by setting P31 = 1 0 0 1 .
4. By the external clock, SIO control unit start to transfer 4-bit data out from LSB to MSB to P9.1/SO by shift
register at every leading edge of SIO serial clock.
5. As SIO processing user can get the SIO status by P14.
6. When shift register has already shifted 4-bit data out and become empty the SIO control unit will send a
SIOI interrupt request to interrupt service rountine to request next data.
By external clock the data must be set into SIO data buffer before next SIO transfer start . So the transfer
clock rate is determinated by the maximum timing from the current interrupt request to the next data written
into SIO data buffer.
7. The SIO interface will be in wait state until the SIOI interrupt service rountine sending next transfer data
to the SIO data buffer( P15 ) then the interrupt will be cleared automatically .
8. In another words, sending STC(P31.3) "0" in SIOI interrupt rountine instead of next transfer data will stop
the current SIO operation user can detect the SIO ending by SCSS ( P14.3) be "0" .
PROGRAM EXAMPLE:
(1) . To transfer a immediate data (0Ah) out by transmit mode with external clock
LDIA #1010b:
OUTA P15 ; Load immediate data 0Ah to P15(SIO data buffer)
LDIA #0001b;
OUTA P31 ; setting SIO in transmission mode with external cbck.
LDIA #1001b
OUTA P31 ; start SIO transer.
:
:
(2) . To terminate the SIO transmission mode with external clock
LDIA
#0001b;
OUTA
P31 ; terminate SIO in transmission mode with external clock.
SIOEND: TTP
P14,3
SBR
SIOEND; Check SIO ending; SCSS =0 .
Receive mode
a. Internal clock type :
SIO transmission mode with external clock
STC
SIOS
SIOSS
SCK
SO
SIOI
PORT 15
D
D'
D0
D1
D2
D3
D'
0
D'
1
D'
2
D'
3
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相關(guān)代理商/技術(shù)參數(shù) |
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| EM73461A | 制造商:EMC 制造商全稱:ELAN Microelectronics Corp 功能描述:4-BIT MICRO-CONTROLLER FOR LCD PRODUCT |
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