參數(shù)資料
型號(hào): M44C090-H
廠商: ATMEL CORP
元件分類: 微控制器/微處理器
英文描述: Low-Current Microcontroller for Wireless Communication
中文描述: 4-BIT, MROM, 4 MHz, MICROCONTROLLER, PDSO20
封裝: SSO-20
文件頁(yè)數(shù): 45/63頁(yè)
文件大?。?/td> 503K
代理商: M44C090-H
M44C890
M44C090
Rev.A4, 14-Dec-01
45 (63)
Serial Interface Registers
Serial Interface Control Register 1 (SIC1)
Auxiliary register address:
9
hex
Bit 3
SIR
Bit 2
SCD
Bit 1
SCS1
Bit 0
SCS0
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ááááá
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áááááááááááááááááááááááááááááááá
áááááááááááááááááááááááááááááááá
áááááááááááááááááááááááááááááááá
áááááááááááááááááááááááááááááááá
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In Transmit mode (SDD = 1) shifting starts only if the transmit buffer has been loaded (SRDY = 1).
SIC1
SIR = 1, SSI inactive
S
erial
C
lock
D
irection
This bit has to be set to
1
during the I
2
C mode
ááááááááá
Reset value: 1111b
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áááááááááááááááááááááááááááá
1
1
0
0
SYSCL / 2
T1OUT / 2
POUT / 2
TOG2 / 2
á
á
á
áááááááááááááááááááááááááááááááá
áááááááááááááááááááááááááááááááá
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and SCS0 are insignificant
0
Setting SIR-bit loads the contents of the shift register into the receive buffer (synchronous 8-bit mode only).
In I
2
C modes, writing a 0 to SIR generates a start condition and writing a 1 generates a stop condition.
Serial Interface Control Register 2 (SIC2)
Auxiliary register address:
A
hex
Bit 3
MSM
Bit 2
Bit 1
Bit 0
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áááááááááááááááááááááááááááááááá
áááááááááááááááááááááááááááááááá
ááááááááááááááááááááááááááááááááá
ááááááááááááááááááááááááááááááááá
áááááááááááááááááááááááááááááááá
áááááááááááááááááááááááááááááááá
áááááááááááááááááááááááááááááááá
ááááááááááááááááááááááááááááááááá
áááááááááááááááááááááááááááááááá
áááááááááááááááááááááááááááááááá
áááááááááááááááááááááááááááááááá
áááááááááááááááááááááááááááááááá
Note: SDD controls port directional control and defines the reset function for the SRDY
flag
odular
S
top
M
ode
used in modulation modes for
generating bit streams which are not sub-multiples of 8 bit.
áááááááááááááááááááááááááááááááá
2
1
0
8-bit NRZ-Data changes with the falling edge of SC
3
0
1
read access
áá
áá
áá
áá
áá
2
C compatible
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SDD
S
erial
D
ata
D
irection
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