AT83EC5123 ATMEL Corporation, AT83EC5123 Datasheet - Page 106
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AT83EC5123
Manufacturer Part Number
AT83EC5123
Description
(AT8xx512x) Smart Card Reader ICs
Manufacturer
ATMEL Corporation
Datasheet
1.AT83EC5123.pdf
(187 pages)
- Current page: 106 of 187
- Download datasheet (3Mb)
8
AT8xC5122/23
Table 79. Serial Peripheral Control Register - SPCON (C3h)
Reset Value = 00010100b
Number
SPR2
Bit
7
6
5
4
3
2
1
0
7
Mnemonic
SSDIS
MSTR
CPHA
SPR2
SPEN
CPOL
SPR1
SPR0
SPEN
Bit
6
Mode
R/W
RW
RW
RW
RW
RW
RW
RW
RW
SSDIS
5
Description
Serial Peripheral Rate 2
Bit with SPR1 and SPR0 define the clock rate
Serial Peripheral Enable
Clear to disable the SPI interface (internal reset of the SPI)
Set to enable the SPI interface
SS Disable
Clear to enable SS in both Master and Slave modes
Set to disable SS in both Master and Slave modes. In Slave mode, this
bit has no effect if CPHA = ’0’
Serial Peripheral Master
Clear to configure the SPI as a Slave
Set to configure the SPI as a Master
Clock Polarity
Clear to have the SCK set to ’0’ in idle state
Set to have the SCK set to ’1’ in idle low
Clock Phase
Clear to have the data sampled when the SPSCK leaves the idle state
(see CPOL)
Set to have the data sampled when the SPSCK returns to idle state
(see CPOL)
Serial Peripheral Rate (SPR2:SPR1:SPR0)
000: Reserved
001: F
010: F
011: F
100: F
101: F
110: F
111: Reserved
CK_SPI
CK_SPI
CK_SPI
CK_SPI
CK_SPI
CK_SPI
MSTR
4
/16
/128
/8
/32
/64
/4
CPOL
3
CPHA
2
SPR1
1
4202B–SCR–07/03
SPR0
0
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