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| 型號： | EM78P451SP |
| 廠商： | ELAN Microelctronics Corp . |
| 英文描述： | 8-Bit Microcontroller with OTP ROM |
| 中文描述： | 8位微控制器的OTP ROM的 |
| 文件頁數(shù)： | 13/54頁 |
| 文件大小： | 421K |
| 代理商： | EM78P451SP |
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EM78P451S
8-Bit Microcontroller with OTP ROM
Product Specification (V1.0) 06.01.2004
(This specification is subject to change without further notice)
9
4.1.11 RD (SPIC: SPI Control Register)
Address
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
0x0D
SPIC/RD
CES
SPIE
SRO
SSE
-
SBRS2
SBRS1
SBRS0
Bit 7 (CES):
Clock Edge Select bit
0 = Data shifts out on rising edge, and shifts in on falling edge. Data is on
hold during the low level.
1 = Data shifts out on falling edge, and shifts in on rising edge. Data is on
hold during the high level.
Bit 6 (SPIE):
SPI Enable bit
0= Disable SPI mode
1= Enable SPI mode
Bit 5 (SRO):
SPI Read Overflow bit
0 = No overflow
1 = A new data is received while the previous data is still being held in the
SPIB register. In this situation, the data in SPIS register will be destroyed.
To avoid setting this bit, users had better read SPIRB register even if only
the transmission is implemented.
NOTE
This can only occur in slave mode.
Bit 4 (SSE):
SPI Shift Enable bit
0 = Reset as soon as the shifting is complete, and the next byte is ready
to shift.
1 = Start to shift, and keep on 1 while the current byte is still being
transmitted.
NOTE
This bit will reset to 0 at every one-byte transmission by the hardware
Bit 2~Bit 0 (SBRS):
SPI Baud Rate Select bits
SPI baud rate table is illustrated in SPI section in later pages.
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